Gravely Lawn Mower 250Z User Manual

Promaster 250Z, 260Z, 272Z  
Service Manual  
992018, 020, 023, 027, 029, 030  
992032, 033, 034, 035  
09254300A 8/04  
Printed in USA  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Ariens Company  
EC DECLARATION OF CONFORMITY ISSUED BY THE MANUFACTURER –  
DÉCLARATION DE CONFORMITÉ CE ÉMISE PAR LE FABRICANT – EU-  
655 West Ryan Street  
P.O. Box 157  
ÜBEREINSTIMMUNGSERKLÄRUNG DES HERSTELLERS – VERKLARING VAN  
OVEREENSTEMMING VOOR DE EU, AFGEGEVEN DOOR DE FABRIKANT – EF  
OVERENSSTEMMELSESERKLÆRING UDSTEDT AF FABRIKANTEN – DICHIARAZIONE  
DI CONFORMITÀ CE RILASCIATA DAL PRODUTTORE – DECLARACIÓN DE  
CONFORMIDAD CE EMITIDA POR EL FABRICANTE – EF-SAMSVARSERKLÆRING FRA  
PRODUSENTEN – EG-DEKLARATIONEN OM ÖVERENSSTÄMMELSE UTFÄRDAD AV  
TILLVERKAREN – VALMISTAJAN ANTAMA EY-VAATIMUSTENMUKAISUUSVAKUUTUS –  
Brillion, Wisconsin 54110-0157  
USA  
Telephone (920) 756-2141  
Facsimile (920) 756-2407  
DEKLARACJA ZGODNO  
DECLARAÇÃO DE CONFORMIDADE CE EMITIDA PELO FABRICANTE  
We the undersigned, ARIENS COMPANY, certify that: Nous, soussignés ARIENS COMPANY, certifions que : Der Unterzeichnete,  
ARIENS COMPANY, bescheinigt, dass: Wij, de ondergetekenden, ARIENS COMPANY, verklaren dat: Undertegnede, ARIENS  
COMPANY, attesterer, at: La sottoscritta società ARIENS COMPANY certifica che: Nosotros, los abajo firmantes, ARIENS  
COMPANY, certificamos que: Undertegnede, ARIENS COMPANY, bekrefter at: Undertecknad, ARIENS COMPANY, intygar att:  
Allekirjoittanut, ARIENS COMPANY, vakuuttaa, että: My, niżej podpisani, ARIENS COMPANY, oświadczamy, że: Nós, abaixo  
assinados, certificamos em nome da ARIENS COMPANY, que:  
ŚCI Z PRZEPISAMI EC WYDANA PRZEZ PRODUCENTA –  
Type:  
Type:  
Tipo:  
Type :  
Type:  
Type:  
Typ:  
Tipo:  
Riding Rotary Lawn Mower – Tondeuse à gazon autoportée rotative – Aufsitz-Sichelmäher – Rijdende  
roterende grasmaaier – Havetraktor med roterende knive – Trattorino con unità di taglio rotativa – Tractor  
cortacésped giratorio – Plentraktor med rotorklipper – Rotoråkgräsklippare – Ajoleikkuri – Samobieżna  
rotacyjna kosiarka trawnikowa – Tractor Cortador de Relva –  
Typ:  
Tipo:  
Tyyppi:  
Typ:  
Trade Name:  
commerciale:  
Appellation commerciale :  
Handelsbezeichnung:  
Handelsnaam:  
Firmanavn: Nome  
Gravely  
Nombre comercial: Handelsnavn:  
Handelsbeteckning:  
Kauppanimi: Nazwa handlowa:  
Nome da Marca:  
Model: Modèle :  
Cutting Width (cm):  
Larghezza di taglio (cm):  
Szerokość cięcia (cm):  
Modell:  
Largeur de coupe (cm) :  
Ancho de corte (cm):  
Largura de corte (cm):  
Model:  
Model:  
Modello:  
Modelo:  
Modell:  
Maaibreedte (cm):  
: Klippbredd (cm):  
Modell:  
Malli:  
Klippebredde (cm):  
Leikkuuleveys (cm):  
Model:  
Modelo:  
992318  
992319  
152  
Schnittbreite (cm):  
152  
Klippebredde (cm)  
Conforms to:  
overensstemmelse med:  
Jest zgodny z: De acordo com:  
Est conforme à :  
Mit den Anforderungen der folgenden Richtlinien übereinstimmt:  
Voldoet aan:  
Er i  
È conforme a:  
Cumple con: Er i samsvar med: Överensstämmer med:  
Täyttää seuraavat vaatimukset:  
98/37/EC, 89/336/EEC;  
2000/14/EC Conformity Assessment Annex VI.  
Annexe VI de l'évaluation de conformité. Konformitätsbewertung, Anhang VI.  
Vurdering af overensstemmelse Anneks VI. Annesso VI della valutazione di conformità.  
Samsvarsvurdering etter vedlegg VI. Bedömning av överensstämmelse Bilaga VI. Vaatimustenmukaisuuden arviointi, liite VI.  
Dodatek VI, Ocena zgodno ci. Anexo VI da Avaliação de Conformidade.  
Bijlage VI voor beoordeling van overeenstemming.  
Anexo VI de la evaluación de la conformidad.  
ś
Representative Measured Sound Power Level (L  
)
Niveau de  
Guaranteed Sound Power Level (L ) – Niveau de puissance  
wa  
wa  
puissance acoustique représentatif mesuré (L  
)
Repräsentativer acoustique garanti (L ) – Garantierter Geräuschpegel (L ) –  
wa  
wa  
wa  
gemessener Geräuschpegel (L  
)
Representatief gemeten  
Gegarandeerd geluidsniveau (L ) – Garanteret støjeffektniveau  
wa  
wa  
geluidsniveau (L  
)
Repræsentativt, målt støjeffektniveau (L  
)
(L ) – Livello di potenza sonora garantito (L ) – Nivel de potencia  
wa wa  
wa  
wa  
Livello di potenza sonora rappresentativo rilevato (L  
)
Nivel de  
Representativt  
Representativ uppmätt ljudnivå (L  
acústica garantizado (L ) – Garantert lydeffektnivå (L ) –  
Garanterad uppmätt ljudnivå (L ) – Taattu äänitehotaso (L ) –  
wa wa  
Gwarantowany reprezentatywny poziom mocy akustycznej (L ) –  
wa  
wa wa  
potencia acústica representativo medido (L  
)
wa  
målt lydeffektnivå (L  
)
)
wa  
wa  
wa  
Tyypillinen mitattu äänitehotaso (L  
)
Zmierzony reprezentatywny Nível de Potência de Som Garantido (L ) –  
wa  
wa  
poziom mocy akustycznej (L  
)
Nível de Potência de Som  
wa  
Medido Representativo (L  
)
wa  
992318: 104 dB  
992319: 104 dB  
992318: 105 dB  
992319: 105 dB  
A
A
A
A
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
Notified Body – Organisme notifié – Zertifizierungsstelle –  
Aangemelde instantie – Bemyndiget organ – Organismo notificato –  
Organismo notificado – Teknisk kontrollorgan – Anmält organ –  
Ilmoitettu laitos – Organ zaświadczający – Organismo –  
Certificador  
SNCH  
11, Route de Luxembourg  
L-5230 Sandweiler  
Philip J. Smucker:  
11/24/2003  
Date Date  
Dato  
Dato Datum  
Data  
Quality and Conformance Manager (Keeper of Technical File)  
Responsable de la qualité et de la conformité des produits  
(Dépositaire de la fiche technique)  
und Konformität (Archivar der technischen Akte)  
normalisatiemanager (Beheerder van technische bestand)  
Datum  
Data  
Datum  
Fecha  
Päiväys Data  
Manager Qualitätssicherung  
Ariens Company  
Kwaliteits- en  
Chef for Brillion, WI 54110-0157 USA  
kvalitet og overensstemmelse (Indehaver af tekniske data)  
Responsabile della qualità e della conformità del prodotto  
Signature  
Handtekening  
Signatur Namnteckning Allekirjoitus  
Podpis Assinatura  
Signature  
Unterschrift  
(Depositario del file tecnico)  
(Depositario del archivo técnico)  
(innehaver av teknisk fil) Chef för kvalitet och  
produktöverensstämmelse (Innehavare av tekniska data)  
ja vaatimustenmukaisuudesta vastaava johtaja (Teknisen tiedoston  
haltija) Kierownik do spraw jakości i zgodności  
(Przechowujący Dokumentację Techniczną) Gestor de Qualidade  
Gerente de calidad y conformidad  
Underskrift  
Firma Firma  
Kvalitet- og samsvarsansvarlig  
Laadusta  
e Conformidade (Zelador de Arquivos Técnicos)  
CE Sound and Vibration – Bruits et vibrations  
CE – CE Geräusch- und Vibrationswerte – CE  
Geluid en trilling – CE støj og vibration –  
Livello sonoro e vibrazioni CE – Sonido y  
vibración CE – CE-lyd og -vibrasjon – CE  
ljudnivå och vibrationer – CE, melu ja tärinä –  
CE Dźwięku i Wibracji – Som e Vibração CE –  
(Ref. EN836-2001)  
Model:  
Modèle :  
Modell:  
Model:  
Model:  
Modello:  
Modelo:  
Modell: Modell:  
Malli:  
Model:  
992318  
992319  
Modelo:  
Oper. Ear Sound Pressure (L ) in dB – Pression acoustique aux oreilles de l’opérateur (L ) en dB –  
pa  
A
pa  
A
Geräuschpegel am Ohr des Bedieners (L ) in dB – Geluidsdruk bij het oor van de gebruiker (L ) in dB –  
pa  
A
pa  
A
Strøjtryk ved brugerens øre (L ) målt i dB – Pressione sonora all’orecchio dell’operatore (L ) in dB – Presión  
pa  
A
pa  
A
de sonido en el oído (L ) in dB – Lydtrykk ved førerens øre (L ) inn dB – Ljudeffekt vid förarens öron (L ) i  
pa  
A
pa  
A
pa  
dB – Kuljettajan korvaan kohdistuva äänenpaine (L ), dB – Robocze ciśnienie akustyczne na uchu (L ) w  
A
pa  
A
pa  
decybelach – Oper. Pressão do Som no Ouvido (L ) em dB  
90  
90  
A
pa  
A
2
2
Vibration Measure (m/sec ) at Operator  
Mesure des vibrations (m/s ) au niveau de l’opérateur  
Vibration (m/  
2
2
2
s ) an des Bedieners  
Gemeten trilling bij (m/sec )  
percepite dall’operatore (m/sec )  
Vibrationsmått (m/s ) vid förarens  
Medida de Vibração (m/seg. ) no Operador  
Vibrationsmålinger (m/s ) ved brugerens  
Medida de vibración (m/seg ) en el operador  
Vibrazioni  
2
2
2
Vibrasjonsmåling (m/s ) ved  
2
2
2
førerens  
Tärinä (m/s ) kuljettajan  
Pomiar wibracji (m/sec ) u operatora  
2
Hands – Mains – Hände – De handen van de gebruiker – Hænder – Mani – Manos – Hender – Händer – Käsissä  
– Ręce – Mãos  
X
Y
Z
3.2  
0.5  
0.9  
< 2.5  
< 2.5  
< 2.5  
Feet – Pieds – Füße – De voeten van de gebruiker – Fødder – Piedi – Pies – Føtter – Fötter – Jaloissa – Stopy  
– Pés  
X
Y
Z
0.2  
0.2  
0.8  
0.5  
0.5  
0.7  
Seat – Siège – Sitz – De bestuurdersplaats – Sæde – Sedile – Asiento – Sete – Säte – Istuimella – Siedzenie –  
Assento  
X
Y
Z
0.3  
0.3  
0.5  
0.5  
0.5  
0.6  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
INTRODUCTION  
honored, whether or not the product registration card is  
returned. Keep a proof of purchase if you do not  
register your unit.  
THE MANUAL  
The purpose of this manual is to provide complete  
instructions for service, maintenance, disassembly,  
repair, and installation of the mechanical components  
for the Promaster 250Z, 260Z, and 272Z.  
Customer Note: If the dealer does not register your  
product, please fill out, sign, and return the product  
registration card to Gravely.  
Dealer trained service personnel should use this  
manual as a supplement to and reminder of the training  
sessions conducted by the company.  
UNAUTHORIZED REPLACEMENT PARTS  
Use only Gravely replacement parts. The replacement  
of any part on this unit with anything other than a  
Gravely authorized replacement part may adversely  
affect the performance, durability, and safety of this unit  
and may void the warranty. Gravely disclaims liability  
for any claims or damages, whether warranty, property  
damage, personal injury or death arising out of the use  
of unauthorized replacement parts.  
Read all information for servicing a part or system  
before repair work is started to avoid needless  
disassembly.  
Operation  
Before operation of the unit, carefully and completely  
read manuals supplied with the unit. The contents will  
provide you with an understanding of safety  
instructions and controls during normal operation and  
maintenance.  
DISCLAIMER  
Gravely reserves the right to discontinue, make  
changes to, and add improvements upon its products  
at any time without public notice or obligations. The  
descriptions and specifications contained in this  
manual were in effect at printing. Equipment described  
within this manual may be optional. Some illustrations  
may not be applicable to your unit.  
Safety Messages  
For your safety and the safety of others always read  
understand, and follow all DANGER, WARNING, and  
CAUTION messages found in manuals and on safety  
decals.  
Directional Reference  
All reference to left, right, front, or rear are given from  
operator seated in operation position and facing the  
direction of forward travel.  
TECHNICAL SERVICE COMMUNICATIONS  
Gravely Technical Service communicates information  
to the field using Service Letters, Service Bulletins,  
Product Notices, and Campaigns. Each  
communication signifies a type of information and  
priority. The dealer is responsible to carry out the  
directive provided in the communication. The types of  
communication are:  
SERVICE AND REPLACEMENT PARTS  
When ordering publications, replacement parts, or  
making service inquiries, know the Model and Serial  
numbers of your unit and engine.  
Numbers are located on the product registration form in  
the unit literature package. They are printed on a serial  
number label, located on the frame of your unit.  
Service Letter - General technical information for the  
dealer. Technical information on how to service the  
product and product improvements.  
Service Bulletin - Notification to update products to  
resolve certain issues or a notification of a policy  
change.  
Serial Number  
Label  
Product Notices - Notification of limited product  
located in a certain region. This is a limited distribution  
to only those who received the product involved.  
OA0017  
Campaigns - Notification of a safety related issue. All  
products must be updated and are tracked by the  
factory until all units are corrected.  
Figure 1  
PRODUCT REGISTRATION  
PREPARATION  
The Gravely dealer must register the product at the  
time of purchase. Registering the product will help the  
company process warranty claims or contact you with  
the latest service information. All claims meeting  
requirements during the limited warranty period will be  
Before starting any removal of parts, proper  
preparation is very important for efficient work. A clean  
work area at the start of each job will allow you to  
perform service repairs easily and quickly.  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
               
SAFETY  
NOTATIONS  
NOTE: General reference information for proper opera-  
tion and maintenance practices.  
WARNING: This cutting machine is capable of  
amputating hands and feet and throwing  
objects. Failure to observe the safety  
instructions in the manuals and on decals could  
result in serious injury or death.  
IMPORTANT: Specific procedures or information  
required to prevent damage to unit or attachment.  
WARNING: Slopes are a major factor related to  
loss-of-control and tip-over accidents. Operation  
on all slopes requires extra caution.  
PRACTICES AND LAWS  
Practice usual and customary safe working  
precautions, for the benefit of yourself and others.  
Understand and follow all safety messages. Be alert to  
unsafe conditions and the possibility of minor,  
moderate, or serious injury or death. Learn applicable  
rules and laws in your area.  
WARNING: Tragic accidents can occur if the  
operator is not alert to the presence of children.  
Never assume that children will remain where  
you last saw them.  
WARNING: Gasoline is extremely flammable  
and the vapors are explosive, handle with care.  
REQUIRED OPERATOR TRAINING  
Original purchaser of this unit was instructed by the  
seller on safe and proper operation. If unit is to be used  
by someone other than original purchaser (loaned,  
rented or sold), ALWAYS provide this manual and any  
needed safety training before operation.  
WARNING: Disengage attachment, stop unit  
and engine, remove key, engage parking brake,  
and allow moving parts to stop before leaving  
operator’s position.  
SAFETY ALERT SYMBOL  
These are safety alert symbols. They  
mean:  
SAFETY DECALS AND LOCATIONS  
ALWAYS replace missing or damaged safety decals.  
See Figure 2 for safety decal locations.  
ATTENTION!  
1. DANGER! TO AVOID SERIOUS INJURY OR  
DEATH  
OL1253  
YOUR SAFETY IS INVOLVED!  
When you see this symbol:  
BECOME ALERT!  
•OBEY THE MESSAGE!  
OL3900  
Read Operator’s Manual.  
OL 1801  
Keep children and others away from unit  
while operating.  
SIGNAL WORDS  
The safety alert symbols above and signal words below  
are used on decals and in this manual.  
OL 4370  
Never direct discharge toward other  
people. Thrown objects can cause injury.  
Read and understand all safety messages.  
OL 0910  
DANGER: IMMINENTLY HAZARDOUS  
SITUATION! If not avoided, WILL RESULT in  
death or serious injury.  
Look down and behind before and while  
backing.  
OL 4460  
WARNING: POTENTIALLY HAZARDOUS  
SITUATION! If not avoided, COULD RESULT in  
death or serious injury.  
Never carry children.  
OL 4470  
CAUTION: POTENTIALLY HAZARDOUS  
SITUATION! If not avoided, MAY RESULT in  
minor or moderate injury. It may also be used to  
alert against unsafe practices.  
Go up and down slopes, not across. DO  
NOT operate on slopes over 17o.  
MAX  
17°  
OL 4450  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
             
• If machine stops going uphill, stop blade and back  
down slowly.  
• Avoid sudden turns.  
• Keep safety devices (guards, shields, switches,  
etc.) in place and working.  
• Check interlock system per manual before use.  
• Understand location and function of all controls.  
• Never allow operation by untrained persons.  
2. DANGER!  
Always keep feet and hands away from  
rotating parts.  
OL 3030  
Always stand clear of discharge area. Do  
not direct discharge toward other people.  
OL 0910  
Keep people away from unit while  
operating.  
OL 4370  
Shut off engine, remove key, and read  
manual before you adjust or repair unit.  
OL 4010  
NO STEP! Always keep feet away from  
rotating parts.  
OL 4420  
3. WARNING!  
Always stand clear of discharge area.  
OL 4430  
Do not operate mower unless guards are in  
operating position or bagger is attached.  
OL 3320  
4. HOT SURFACES!  
DO NOT touch parts which are hot from  
operation. ALWAYS allow parts to cool.  
OD 0061  
5. DANGER!  
AVOID INJURY. Stay clear of rotating parts.  
OL 4730  
AVOID INJURY. Stay clear of rotating fan.  
OL 4740  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
DANGER / PELIGRO  
• Avoid injury - Stay clear of rotating parts.  
• Risque de blessures - ne pas s’approcher des pièces en  
mouvement.  
DANGER/PELIGRO  
• Evitar lesiones - Mantenerse alejado de las piezas giratorias.  
WARNING/AVERTISSEMENT/ADVERTENCIA  
Do not operate mower Ne jamais utiliser No operar segadora  
a
unless guards are in  
operating position or protecteur sur le  
bagger is attached. canal d'ejection ou operacion  
sans le bac monte. recogedor este fijo.  
la tondeuse sans  
menos que las defensas  
esten en posicion de  
el  
o
07742300B  
DANGER / PELIGRO  
17  
MAX  
TO AVOID SERIOUS INJURY OR DEATH  
Read the operator's manual.  
If machine stops going uphill, stop blade and  
back down slowly.  
Keep children and others away from unit while  
operating.  
Avoid sudden turns.  
DANGER/PELIGRO  
Never direct discharge toward other people.  
Thrown objects can cause injury.  
Look down and behind before and while backing.  
Never carry children.  
Keep safety devices (guards, shields, switches,  
etc.) in place and working.  
Check interlock system per manual before use.  
Understand location and function of all controls.  
Never allow operation by untrained persons.  
Go up and down slopes, not across.  
POUR EVITER LES BLESSURES GRAVES  
OU LA MORT  
PARA EVITAR DAÑOS SERIOS  
MUERTE  
O
LA  
Lire le manuel d'utilisation.  
Leer el manual del operador.  
Mantenga la unidad alejada de los niños  
personas cuando esté en funcionamiento.  
Éloigner les enfants et tout autre personne  
pendant le fonctionnement de la machine.  
Ne jamais décharger directement en direction  
de quelqu’un. Des particules projetées  
peuvent provoquer des blessures.  
Regardez derrière et sur les côtés lorsque  
vous reculez.  
y
otras  
Nunca dirija la descarga hacia otras personas,  
ya que los objetos lanzados pueden provocar  
lesiones.  
Antes  
detras.  
Nunca monten niños.  
Suba baje pendientes, no transversalmente.  
Si la maquina se detiene subiendo cuesta,  
desactive la cuchilla baje lentamente.  
Evite viradas subitas.  
y
durante retroceso mirar hacia abajo  
y
Ne transportez jamais d'enfant.  
Tondez toujours de haut en bas et  
inversement jamais le long des pentes.  
y
Si la machine s'arrête en montee. Debrayez  
y
la lame et redescendez doucement.  
Evitez les virages brusques.  
Mantenga artefactos de seguridad (defensas,  
Maintenez toujours en place tous les  
elements de sécurité (protecteurs,  
interrupteurs, etc.).  
protectores, interruptores, etc.) en su lugar  
trabajando.  
y
Verifique en el manual el sistema de engranar  
antes de usar.  
Controler le bon fonctionnement du système  
de sécurité avant utilisation tel qu'indiqué  
dans le manuel d'utilisation.  
Comprenez bien la fonction et la situation de  
chacun des leviers et boutons de commande.  
Ne jamais permettre l'utilisation par des  
personnes n'ayant pas reçu la formation  
nécessaire.  
Tenga conocimiento de funciones  
y
localizaciones de todos los controles.  
No permitir que personal sin la necesaria  
formación use la máquina.  
05359300  
Figure 2 - Safety Decals  
Keep children out of work area and under watchful care  
of a responsible adult.  
SAFETY RULES  
Read, understand, and follow all safety practices in  
Owner/Operator Manual before beginning assembly.  
Failure to follow instructions could result in personal  
injury and/or damage to unit.  
Keep area of operation clear of all toys, and debris.  
Thrown objects can cause injury.  
Check for weak spots on docks, ramps or floors, Avoid  
uneven work areas and rough terrain. Stay alert for  
hidden hazards or traffic.  
ALWAYS remove key from ignition and wire from spark  
plug before assembly. Unintentional engine start up  
can cause death or serious injury.  
DO NOT operate near drop-offs, ditches, or  
embankments. Unit can suddenly turn over if a wheel is  
over the edge of a cliff or ditch, or if an edge caves in.  
Complete a walk around inspection of unit and work  
area to understand:  
Data indicates that operators, age 60 and above, are  
involved in a larger percentage of riding mower related  
injuries. These operators should evaluate their ability to  
operate the riding mower safely enough to protect  
themselves and others from serious injury.  
• Work area  
• Your unit  
• All safety decals  
Inspect unit before each use for: missing or damaged  
decals and shields, correctly operating safety interlock  
system, and deterioration of grass catchers. Replace  
or repair as needed.  
Read the entire Owner/Operator manual and other  
training material. If the operator or the mechanic  
cannot read the manual, it is the owner’s responsibility  
to explain it to them. Only the user can prevent and is  
responsible for accidents or injuries occurring to  
themselves, other people or property.  
ALWAYS check overhead and side clearances  
carefully before operation. ALWAYS be aware of traffic  
when crossing or operating along streets or curbs.  
Keep children and people away.  
Only trained adults may operate unit. Training includes  
actual operation.  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Local regulations may restrict the age of the operator.  
Start and operate unit only when seated in operator’s  
position. Steering control levers must be in neutral,  
PTO disengaged and parking brake set when starting  
engine.  
NEVER allow children to operate or play on or near  
unit. Be alert and shut off unit if children enter area.  
NEVER operate unit after or during the use of  
medication, drugs or alcohol. Safe operation requires  
your complete and unimpaired attention at all times.  
Use care when approaching blind corners, shrubs,  
trees or other objects that may obscure vision.  
Dust, smoke, fog, etc. can reduce vision and cause an  
accident. Mow only in daylight or good artificial light.  
DO NOT wear loose clothing or jewelry and tie back  
hair that may get caught in rotating parts.  
Avoid slippery surfaces. Always be sure of your footing.  
Wear adequate outer garments.  
DO NOT mow on wet grass. Reduced traction could  
cause sliding and effect the machine’s stability.  
NEVER wear open sandals or canvas shoes during  
operation. Wear adequate safety gear, protective  
gloves and footwear.  
Watch for traffic when operating near or crossing  
roadways.  
Wear proper footwear to improve footing on slippery  
surfaces.  
Never carry passengers.  
Always wear safety goggles or safety glasses with side  
shields when operating mower.  
DO NOT try to stabilize the machine by putting your  
foot on the ground.  
Moving parts can cut or amputate fingers or a hand.  
Wrap blade(s) or wear gloves to service. On multiblade  
mowers, rotation of one blade will cause all blades to  
rotate.  
Never direct discharge towards persons or property  
that may be injured or damaged by thrown objects. Use  
extreme caution on gravel surfaces.  
Always stand clear of the discharge area.  
NEVER place your hands or any part of your body or  
clothing inside or near any moving part while unit is  
running.  
ALWAYS disengage PTO, stop unit and engine,  
remove key, engage parking brake and allow moving  
parts to stop before leaving operator’s position.  
ALWAYS keep hands and feet away from all rotating  
parts during operation. Rotating parts can cut off body  
parts.  
Never engage PTO while raising attachment or when  
attachment is in raised position.  
DO NOT operate at too fast a rate. DO NOT change  
engine governor settings or over-speed engine. Slow  
down before turning.  
ALWAYS keep body and hands away from pin holes or  
nozzles which eject hydraulic fluid under pressure.  
DO NOT touch parts which are hot. Allow parts to cool.  
DO NOT operate in reverse unless absolutely  
necessary.  
ALWAYS keep hands and feet away from all pinch  
points.  
ALWAYS look down and behind before and while  
backing.  
Fumes from the engine exhaust can cause death or  
serious injury. DO NOT run engine in an enclosed  
area. Always provide good ventilation.  
Stop and inspect equipment if you strike an object or if  
there is an unusual vibration. Repair, if necessary,  
before restarting. Never make adjustments or repairs  
with the engine running.  
Read, understand, and follow all instructions in the  
manual and on the machine before starting.  
Understand:  
Mower blades are sharp and can cut you. Wrap the  
blade(s) or wear gloves, and use extra caution when  
servicing them.  
• How to operate all controls  
• The functions of all controls  
• How to STOP in an Emergency  
• Braking and steering characteristics  
• Turning radius and clearances  
NEVER weld or straighten mower blades.  
Rotation of one blade may cause rotation of the other  
blades.  
Take all possible precautions when leaving unit  
unattended. Shut off engine. Remove wire from spark  
plug and secure it away from spark plug.  
Keep safety devices or guards in place and functioning  
properly. NEVER modify or remove safety devices.  
Do not operate without either entire grass catcher  
or the discharge guard in place.  
ALWAYS remove key to prevent unauthorized use.  
Know the weight of loads. Limit loads to those you can  
safely control and the unit can safely handle.  
Stop engine before removing grass catcher or  
unclogging chute.  
Disengage PTO when attachment is not in use.  
ALWAYS turn off power to attachment when traveling,  
crossing driveways, etc.  
Ensure Safety Interlock System is functioning properly.  
DO NOT operate unit if safety interlock is damaged or  
disabled.  
Mow up and down slopes, not across them.  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
DO NOT operate on slopes of more than 17 degrees.  
Never fill containers inside a vehicle or on a truck or  
trailer bed with a plastic liner. Always place containers  
on the ground away from your vehicle before filling.  
Use of a Rollover Protection System (ROPS) is  
recommended for slope operation.  
When practical, remove gas-powered equipment from  
the truck or trailer and refuel it on the ground. If this is  
not possible, then refuel such equipment on a trailer  
with a portable container, rather than from a gasoline  
dispenser nozzle.  
Always wear a seat belt when operating unit using a  
Rollover Protection System (ROPS).  
Keep all movements on the slope slow and gradual. Do  
not make sudden changes in speed or direction.  
Avoid starting or stopping on the slope. If tires lose  
traction, disengage the blades and proceed slowly  
straight down the slope.  
Keep the nozzle in contact with the rim of the fuel tank  
or container opening at all times until fueling is  
complete. Do not use a nozzle lock-open device.  
If you cannot back up a slope or you feel uneasy on it,  
do not mow it.  
If fuel is spilled on clothing, change clothing  
immediately.  
DO NOT park on slopes unless necessary. When  
parking on slope always chock or block wheels. Always  
set parking brake.  
Avoid Electric Shock. Objects contacting both battery  
terminals at the same time may result in injury and unit  
damage. DO NOT reverse battery connections.  
Use a slow speed. Tires may lose traction on slopes  
even though the brakes are functioning properly.  
Reversed connections may result in sparks which can  
cause serious injury. Always connect positive (+) cable  
FIRST, and negative (-) cable SECOND.  
DO NOT bypass transmission when on a slope.  
Tow only with a machine that has a hitch designed for  
towing. Do not attach towed equipment except at the  
hitch point.  
Explosive Gases from battery can cause death or  
serious injury. Poisonous battery fluid contains sulfuric  
acid and its contact with skin, eyes or clothing can  
cause severe chemical burns.  
Follow the manufacturer’s recommendations for weight  
limits for towed equipment and towing on slopes.  
No flames, No sparks, No smoking near battery.  
NEVER allow children or others in or on towed  
equipment.  
ALWAYS wear safety glasses and protective gear near  
battery. Use insulated tools.  
On slopes, the weight of the towed equipment may  
cause loss of control.  
DO NOT TIP battery beyond a 45o angle in any  
direction.  
Travel slowly and allow extra distance to stop.  
ALWAYS keep batteries out of reach of children.  
Use extra care when loading or unloading unit onto  
trailer or truck.  
Battery posts, terminals and related accessories  
contain lead and lead compounds, chemicals known to  
the State of California to cause cancer and  
Secure unit chassis to transport vehicle. NEVER  
secure from rods or linkages that could be damaged.  
reproductive harm. Wash hands after handling.  
DO NOT transport machine while engine is running.  
ALWAYS block wheels and know all jack stands are  
strong and secure and will hold weight of unit during  
maintenance.  
ALWAYS turn off power to attachment and shut off fuel  
when transporting unit.  
Release pressure slowly from components with stored  
energy.  
Keep unit free of debris. Clean up oil or fuel spills.  
This product is equipped with an internal combustion  
type engine. DO NOT use unit on or near any  
unimproved, forest-covered or brush covered land  
unless exhaust system is equipped with a spark  
arrester meeting applicable local, state or federal laws.  
A spark arrester, if it is used, must be maintained in  
effective working order by operator.  
NEVER attempt to make any adjustments to unit while  
engine is running (except where specifically  
recommended). Stop engine, remove key or spark plug  
wire and wait for all moving parts to stop before  
servicing or cleaning.  
Check parking brake operation frequently. Adjust and  
service as required.  
Fuel is highly flammable and its vapors are explosive.  
Handle with care. Use an approved fuel container.  
ALWAYS maintain unit in safe operating condition.  
Damaged or worn out muffler can cause fire or  
explosion.  
NO smoking, NO sparks, NO flames. ALWAYS allow  
engine to cool before servicing.  
Maintain or replace safety and instruction labels, as  
necessary.  
NEVER fill fuel tank when engine is running or hot from  
operation.  
NEVER store unit with fuel in fuel tank, inside a  
building where any ignition sources are present.  
NEVER fill or drain fuel tank indoors.  
Replace fuel cap securely and clean up spilled fuel.  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Shut off fuel and allow engine to cool completely before  
storing in closed area or covering unit.  
Test  
Steering  
Levers  
PTO  
Parking  
Brake  
Engine  
Clean grass and debris from unit, especially from  
around muffler and engine, to help prevent fires.  
STARTING INTERLOCK  
For extended storage, shut off fuel and clean unit  
thoroughly. See engine manual for proper storage.  
1
2
Neutral  
Neutral  
Off  
On  
Engaged  
Engaged  
Start  
Doesn’t  
Start  
Lower cutting deck unless a positive mechanical lock is  
used.  
3
Neutral  
Off  
Disengaged  
Doesn’t  
Start  
Use only attachments or accessories designed for your  
unit.  
Check all hardware at regular intervals, especially  
blade attachment bolts. Keep all hardware properly  
tightened.  
OPERATING INTERLOCK (ENGINE ON)  
4*  
5*  
6*  
Neutral  
Neutral  
Neutral  
On  
Off  
Off  
Engaged  
Disengaged  
Engaged  
Shuts Off  
Shuts Off  
On  
Check attachment components frequently. If worn or  
damaged, replace with manufacturer’s recommended  
parts.  
*Operator lifts off seat.  
Safety Interlock System  
WARNING: Safety interlock system failure  
and improper operation of unit can result in  
death or serious injury. Test this system each  
time unit is operated. If this system does not  
function as described, do not operate until  
repairs are made.  
Parking Brake Interlock System  
With parking brake engaged, steering levers must be  
locked in neutral.  
With parking brake disengaged, engine must not start  
and engine must shut off if operator leaves seat.  
Perform the following tests to ensure safety interlock  
system is working properly. If unit does not perform as  
stated contact your Gravely dealer for repairs.  
NOTE: For all models, when parking brake is engaged,  
steering levers are locked in neutral.  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
SPECIFICATIONS  
Model Number  
Model  
992018  
992023  
992027  
PM260Z 25 HP Kohler  
with 50 Inch Deck  
PM250Z 20 HP Briggs &  
Stratton with 50 Inch  
Deck  
PM260Z 25 HP Kohler with  
72 Inch Deck  
Length - in (cm)  
Height - in (cm)  
Width - in (cm)  
Weight Actual - lbs (kg)  
Battery  
87 (221)  
90 (229)  
50 (127)  
63 (160)  
85 (216)  
1100 (499)  
1080 (490)  
12 volt  
1259 (572)  
Brakes  
Hydro/Dynamic Disk - Parking  
Turning Radius  
Tire Size Front  
Rear  
0
15 x 6 - 6  
23 x 8.5 - 12  
Briggs & Stratton  
351777  
15 x 6 - 6  
23 x 10.5 - 12  
Kohler  
15 x 6 - 6  
12 x 1.5 - 12  
Kohler  
Engine - Manufacturer  
Model Number  
Cycle  
CV25S  
CV25S  
4
Engine Power-  
25 HP  
20 HP  
25 HP  
-1  
-1  
-1  
-1  
HP (KW/min  
)
(18.6 KW/min  
)
(14.7 KW/min  
Electric  
)
18.6 KW/min  
)
Starting System  
Fuel Tank Capacity  
Fuel  
9 gals. US (34 liters)  
See Engine Manual  
1800  
Idle RPM  
Governed RPM  
Air Cleaner  
3600  
Large Capacity Dual ELement  
Air Cooled  
Cooling Capacity  
Engine Oil Type  
Spark Plug Gap  
Transmission  
See Engine Manual  
See Engine Manual  
Hydrostatic Drive  
9 MPH  
Speed - Forward Max.  
Reverse Max.  
4.5 MPH  
Transmission Lube  
Drive Clutch  
Mobil 1 15W - 50 Synthetic  
Hydrostatic  
Tire Pressure Front  
Rear  
20-25 psi  
12-15 psi  
Lift system  
Hydraulic  
Power Take Off  
Cutting Width - in (cm)  
Cutting Height - in (cm)  
Cutting Increments - in (cm)  
Electric PTO Clutch/Brake  
50 (127)  
72 (183)  
1 - 5 (2.5 - 12.7)  
Infinite between 1 - 5 (2.5 - 12.7)  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Model Number  
Model  
992020  
992029  
992030  
992032  
992033  
992034  
992035  
260Z 25 HP  
Kohler  
w/60" deck  
260Z 25 HP  
Kawasaki  
w/60" deck  
272Z 25 HP  
Kawasaki  
w/72" deck  
272Z 26 HP  
EFI Kohler  
w/72" deck  
260Z 26 HP 250Z 23 HP 250Z 23 HP  
Kawasaki  
w/50" deck  
Kawasaki  
w/50" deck  
Kawasaki  
w/50" dek  
Length - in (cm)  
Height - in (cm)  
Width - in (cm)  
Weight Actual - lbs (kg)  
Battery  
80 (203)  
84 (213.4)  
50 (127)  
85 (216)  
1259 (572)  
12 volt  
80 (203)  
73 (185)  
73 (185)  
63 (160)  
1100 (499)  
1125 (510)  
1125 (510)  
Brakes  
Hydro/Dynamic Disk - Parking  
Turning Radius  
Tire Size Front  
Rear  
0
15 x 6 - 6  
23 x 10.5 - 12  
Kohler  
Engine - Manufacturer  
Model Number  
Cycle  
Kohler  
CV25S  
Kawasaki  
FH721V  
Kawasaki  
CV26S  
FH601V  
FH680V  
4
Engine Power - HP (kw) @  
Governed RPM  
25 (18.6)  
26 (19.3)  
19 (14.1)  
23 (17.2)  
Governed RPM  
Idle RPM  
3600  
1800  
Starting System  
Fuel Tank Capacity  
Fuel  
Electric  
9 gals. US (34 liters)  
See Engine Manual  
Large Capacity Dual ELement  
Air Cooled  
Air Cleaner  
Cooling Capacity  
Engine Oil Type  
Spark Plug Gap  
Transmission  
See Engine Manual  
See Engine Manual  
Hydrostatic Drive  
9 MPH  
Speed - Forward Max.  
Reverse Max.  
4.5 MPH  
Transmission Lube  
Drive Clutch  
Mobil 1 15W - 50 Synthetic  
Hydrostatic  
Tire Pressure Front  
Rear  
20-25 psi  
12-15 psi  
Lift system  
Hydraulic  
Power Take Off  
Cutting Width - in (cm)  
Cutting Height - in (cm)  
Cutting Increments - in (cm)  
Electric PTO Clutch/Brake  
60 (152)  
72 (183)  
1 - 5 (2.5 - 12.7)  
Infinite between 1 - 5 (2.5 - 12.7)  
60 (152)  
50 (127)  
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
CONTROLS AND FEATURES  
8
19  
13  
3
10  
9
11  
8
14  
7
15  
16  
20  
17  
2
6
5
18  
4
12  
22  
21  
OF 1722  
1
23  
1. Mower Deck with Chute Deflector  
2. Fuel Shut off Valve  
3. Parking Brake  
12.Ignition Switch  
13.Power Take Off (PTO) Switch  
14.Steering Levers  
4. Battery  
15.Mower Lift Lever  
5. Hour Meter  
16.Seat Adjustment Lever  
6. Oil Pressure Indicator  
7. Engine Frame and Hood  
8. Fuel Tanks and Caps  
9. Choke Control (not on EFI* models)  
10.Malfunction Indicator Light  
11.Throttle Lever  
17.Seat Suspension Adjustment Knob (not on  
model 992034)  
18.Height of Cut Indicator  
19.Hydraulic Oil Reservoir  
20.Engine Hood Latch  
21.Cylinder Stop Storage Post  
22.Cylinder Stops  
*Electronic Fuel Injection  
Figure 3  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
GENERAL MAINTENANCE & ADJUSTMENTS  
Proper maintenance can prolong the life of unit. The  
MAINTENANCE SCHEDULE  
following chart shows the recommended service  
schedule. More frequent service may be required due  
to working conditions (Heavy loads, high ambient  
temperatures, dusty conditions, or airborne debris).  
WARNING: AVOID INJURY. Read and  
understand the entire Safety section before  
proceeding.  
See the maintenance instructions in Engine Manual for  
additional information.  
Interval  
Task  
Action  
Check Safety Interlock  
WARNING: Safety interlock system failure and improper operation of  
unit can result in death or serious injury. Test this system each time unit is  
operated. If this system does not function as described, do not operate  
until repairs are made (see Safety Interlock System on page 11).  
Check Parking Brake  
Interlock System  
See Parking Brake Interlock System on page 11.  
Check Parking Brake  
Engage parking brake. Push unit. If unit rolls adjust parking brake (see Parking  
Brake Adjustment on page 22).  
Each Use  
Check Hydraulic Oil Level  
Check Tires  
See Checking Hydraulic Oil Level on page 26.  
See Specifications on page 12 for correct tire pressure.  
Clean Unit  
Clean engine, battery, seat, mower deck, etc. of all dirt and debris. Do not use  
solvents, hard cleaners, or abrasives.  
NOTE: Protect painted surfaces with automotive type wax.  
Follow Engine Manual  
Maintenance Schedule  
Perform scheduled engine maintenance. Refer to Engine Manual for detailed  
instructions.  
Check Cooling System  
Check cooling system for dirt and debris. Refer to Engine Manual for detailed  
instructions.  
Every 25 Check Mower Blades  
Hours  
Ensure mower blade hardware is tightened to 115 – 125 lbf-ft. (156 – 169 Nm).  
Check mower blades for wear, Sharpen or replace mower blades as needed (see  
Sharpening Mower Blade on page 19).  
Every 50 Lubricate Front Axle and  
Oil all pivot points, pin connections and apply grease to front axle grease zerk (see  
General Lubrication on page 18).  
Hours  
Pivot Points  
Keep battery and battery terminals clean (see Cleaning the Battery on page 19).  
Clean Battery  
Check Fasteners  
Check mower blade mounting hardware and all other fasteners. Replace missing  
or damaged fasteners. Tighten all nuts and bolts to their correct torque value.  
Every  
100  
Check Belts  
Replace worn or deteriorated belts.  
• Check mower drive belt (see Replacing Mower Belts on page20 for mower  
drive belt location).  
Hours  
• Check PTO belt (see PTO Belt Removal on page 20 for PTO belt location).  
• Check radiator fan belt (refer to Engine Manual).  
Every  
400  
Grease Front Axle Caster  
Pivots  
Repack front axle caster pivots (see General Lubrication on page 18).  
Hours  
Every  
500  
Hours  
Change Hydraulic Oil and  
Filter  
See Hydraulic Oil System on page 26.  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
SERVICE AND ADJUSTMENTS  
Gravely Dealers will provide any service which may be  
required to keep your unit operating at peak efficiency.  
Should engine service be required, it can be obtained  
from a Gravely Dealer or engine manufacturer’s  
authorized service center.  
7
4
5
1
8
2
3
WARNING: AVOID INJURY. Read and  
understand the entire Safety section before  
proceeding.  
9
6
CAUTION: HOT SURFACES may result in  
injury. DO NOT touch engine or drive parts  
which are hot from operation. Allow parts to  
cool before servicing.  
OF 1811  
10  
1. Steering Levers  
2. Parking Brake  
3. Footboard  
6. Service Slot  
7. Full Service Position  
8. Engine  
4. Engine Hood &  
Frame  
9. No Step Decal  
10.Battery  
SERVICE POSITIONS  
IMPORTANT: Place unit on a flat level surface.  
ALWAYS shut off engine, set parking brake, and  
remove ignition key. Ensure unit is secure and will not  
tip over. When a lift is used, strap and clamp unit to the  
lift.  
5. Engine Hood Prop  
Rod  
Figure 4  
MOVING UNIT MANUALLY  
1. Place steering levers in neutral position and set  
parking brake.  
1
2. Unhook hood latches. Firmly grasp hood frame  
handle and lift to the desired service position  
2
CAUTION: When opening hood, use care to  
properly engage hood prop rod into service  
slot. Be sure footing is secure to  
accommodate weight shift of hood when  
rotating to full service position.  
OF 1730  
Daily Service Position: Place hood prop rod into  
service slot. Ensure prop rod is engaged in service slot  
properly.  
1. Right Bypass Valve  
Lever  
2. Left Bypass Valve  
Lever  
Full Service Position: Slowly release hood after seat  
contacts foot board. Use care and be sure of your  
footing. Do not step on mower deck.  
Figure 5  
IMPORTANT: Never tow unit.  
1. Place hood in the full service position (see Service  
Positions on page 16).  
3. When service is complete, lower hood, and secure  
with hood latches.  
2. Rotate the bypass valve dump levers located on  
the pumps using a wrench.  
WARNING: Do not bypass transmission when  
on a slope.  
3. Disengage parking brake.  
4. Push unit to desired location.  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
5. Engage parking brake.  
IMPORTANT: Never spray unit with water or store unit  
outdoors. Water can seep into sealed bearings and  
reduce component life. Bearings are sealed against dirt  
and debris only.  
6. Levers must be returned to their original position in  
order to operate the unit (Figure 5).  
TRANSPORTING UNIT  
A unit that is excessively dirty should be cleaned  
before work starts. Cleaning will occasionally uncover  
trouble sources. Dirt and abrasive dust reduce the  
efficient work life of parts and can lead to costly  
replacement.  
ALWAYS shut off engine, set parking brake, and  
remove key when transporting unit on a truck or trailer.  
Tie unit down securely. Do not tie down by linkages,  
guards, cables or other parts that may be damaged.  
STARTING AND SHUTTING OFF THE  
ENGINE  
NOTE: DO NOT operate starter more than 15 seconds  
per minute, as overheating and damage can occur. If  
engine will not start, see Troubleshooting on page 42  
or refer to Engine Manual.  
WARNING: AVOID INJURY. Read and  
understand the entire Safety section before  
proceeding.  
Short Term  
NEVER spray unit with high-pressure water or store  
unit outdoors.  
NOTE: PTO must be disengaged and parking brake  
engaged prior to starting engine.  
Inspect unit for visible signs of wear, breakage or  
damage.  
To start:  
1. Insert ignition key (Figure 6).  
2. Move throttle control lever to middle position.  
Keep all nuts, bolts and screws properly tightened and  
know unit is in safe working condition.  
NOTE: If engine is cold, move choke control to the on  
position. Once engine has started and is warmed up,  
move choke control to the off position. If engine is  
warm, do not use choke.  
Store unit in a cool, dry protected area.  
Long Term  
Clean unit thoroughly and lubricate. Touch up all  
scratched painted surfaces.  
3. Turn ignition key to Start (3) position. If engine  
does not start in five seconds, release ignition key,  
wait, and then repeat. Once engine has started,  
ignition key will return to the Run (2) position.  
Remove weight from wheels by putting blocks under  
frame or axle.  
When storing unit for extended periods of time, remove  
all fuel from tank and carburetor (run dry). Refer to  
Engine Manual.  
OFF  
Clean and charge battery. Charge battery every three  
to four weeks when storing unit.  
1
RUN  
When taking unit out of extended storage:  
START  
2
1. Check for any damage or loose parts. Repair,  
replace or tighten hardware before operation,  
especially blade attachment bolts.  
OF 1750  
3
2. If a preservative fluid was used in fuel tank, drain  
and discard. Fill fuel tank with fresh new fuel.  
Figure 6  
To shut off:  
1. Disengage PTO.  
2. Set parking brake.  
3. Turn ignition key to Off (1) position.  
CLEANING AND STORAGE  
WARNING: AVOID SHARP EDGES which  
can cut. Movement of parts can cut off fingers  
or a hand. Wrap blades, wear gloves, and use  
extreme caution when servicing.  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
Apply oil at all pivot points and pin connections.  
FILLING FUEL TANK  
EXPLOSIVE VAPORS and FLAMMABLE  
FUEL can result in serious injury or death.  
Handle fuel with care. ALWAYS use an  
approved fuel container.  
1
2
No Smoking!  
No Lighted Materials!  
No Open Flame!  
Allow engine to cool.  
1
Use caution with fuel. Fuel is very flammable.  
Keep fuel in a clean and tight container. Keep  
fuel away from fire or heat. Never put fuel in  
the fuel tank while the engine is running or  
hot. Clean up any spilled fuel before starting  
the engine.  
OF 1792  
Item  
Lubrication  
Repack  
Grease  
Oil  
Item  
Location  
Caster Pivot  
Axle Pivot  
Interval  
400 hours  
50 hours  
50 hours  
1
2
2
1
Add fuel to the tank as needed.  
All Pivot Points, Pin  
Connections  
IMPORTANT: Refer to Engine Manual for correct type  
and grade of fuel. See Specifications for fuel tank  
capacity.  
Figure 7  
IMPORTANT: Wipe front axle grease zerk and two  
front axle caster pivots clean before and after  
lubrication.  
To add fuel to the fuel tank:  
1. Refuel the unit only in a well ventilated, open area.  
2. Stop the engine.  
NOTE: Use Stens Mix Hi-Temp Grease or equivalent  
(part number 00036700).  
3. Clean the fuel cap and the area around the fuel  
cap to prevent dirt from entering the fuel tank.  
Remove the cap from the fuel tank.  
Description  
Grease fittings  
Use  
Interval  
4. Fill the fuel tank. Be careful not to spill the fuel. Do  
not overfill, allow for fuel expansion. Stop filling  
when fuel is about 1" below the bottom of the neck.  
Sten Mix HI-Temp  
50 hrs. running time  
grease or equivalent  
Hydraulic system  
Mobil 15W50  
synthetic oil  
500 hrs. running  
time  
5. Install the cap on the fuel tank and tighten.  
6. Clean up any spilled fuel before starting the  
engine.  
SERVICING THE BATTERY  
FASTENERS  
WARNING: AVOID INJURY. Read and  
understand the entire Safety section before  
proceeding.  
Each day before operating, check mower blade  
mounting hardware and all other fasteners. Replace  
fasteners that are missing or damaged. Tighten all nuts  
and bolts to their correct torque value.  
WARNING: Battery posts, terminals and  
related accessories contain lead and lead  
compounds, chemicals known to the State of  
California to cause cancer and reproductive  
harm. Wash hands after handling.  
GENERAL LUBRICATION  
IMPORTANT: Wipe each fitting clean before and after  
lubrication.  
Lube fitting locations are: front axle pivot (1) (Figure 7)  
Apply Sten Mix Hi-Temp Grease or equivalent to the  
lube fittings. Order P/N: 00036700 - Ten pack of 14 oz.  
cartridges.  
NOTE: Unit comes equipped with a maintenance-free  
battery that requires no regular maintenance except  
cleaning the terminals.  
When using Sten Mix Grease for the first time, all  
components should be thoroughly cleaned prior to  
lubricating.  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Eyes: Flush with water for at least 15 minutes and  
Battery Removal and Installation  
Remove  
1. Place hood in full service position (see Service  
Positions on page 16).  
get medical attention immediately!  
Internal Contact: Drink large quantities of water.  
Follow with Milk of Magnesia, beaten egg or  
vegetable oil. Get medical attention immediately!  
2. Disconnect negative (-) cable first, then positive (+)  
cable (Figure 8).  
• In case of internal contact, DO NOT induce  
vomiting!  
3. Remove battery hold-down bracket and battery  
from unit.  
IMPORTANT: DO NOT fast charge. Charging at a  
higher rate will damage or destroy battery. ALWAYS  
follow information provided on battery and battery  
charger. Contact battery manufacturer and battery  
charger manufacturer for detailed instructions.  
Install  
1. Install battery on unit with battery hold-down  
bracket.  
1. Remove battery from unit (see Battery Removal  
and Installation on page 19).  
2. Connect positive (+) cable first, then negative (-)  
cable.  
2. Place battery on bench or other well-ventilated  
area.  
3. Coat terminals with dielectric grease or petroleum  
jelly.  
3. Connect positive (+) lead of charger to positive (+)  
terminal, and negative (-) lead to negative (-)  
terminal.  
4. Close hood.  
Cleaning the Battery  
1. Disconnect negative (-) cable first, then positive (+)  
cable.  
4. Charge battery according to the instructions from  
battery charger manufacturer and battery  
manufacturer.  
2. Clean battery cable ends and terminals with wire  
brush. Rinse with a weak baking soda solution.  
Storage  
3. Connect positive (+) cable first, then negative (-)  
cable.  
The battery is a perishable item and it should be stored  
properly to obtain a long, useful life. Batteries not in  
use will self discharge.  
4. Coat terminals with dielectric grease or petroleum  
jelly.  
If the battery will not be used for more than three  
months, it should be removed and stored in a cool, dry  
place.  
Any collection of dirt, grease, or electrolyte should be  
removed from the top of the battery.  
2
The battery must be recharged monthly. Before  
reinstalling the battery in the spring, it should always be  
fully recharged.  
3
1
BASIC ENGINE MAINTENANCE  
5
4
See your engine manual and Engine Chapter of this  
manual for detailed information on the operation and  
maintenance of your engine.  
OF 3227  
1. Battery  
4. Positive (+) Terminal  
5. Positive (+) Cable  
1. Each day before operating, check the level of the  
oil in the engine. Never operate the engine when  
the oil level is below the add mark.  
2. Negative (-) Terminal  
3. Negative(-) Cable  
2. Each day before operating, check the air cleaner  
element. Dirt can decrease the flow of air to the  
engine.  
Figure 8  
Charging the Battery  
WARNING: FROZEN BATTERIES CAN  
3. Each day before operating, check the air cooling  
system on the engine. Debris can decrease the  
flow of air cooling the engine.  
EXPLODE and result in death or serious  
injury. DO NOT charge a frozen battery. Let  
battery thaw before charging.  
4. Follow the maintenance instructions in your engine  
manual concerning oil and filter changes.  
Follow First Aid directions for contact with battery fluid.  
External Contact: Flush with water.  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
BELTS  
3
WARNING: MOVING PARTS can cut or  
1
amputate body parts. ALWAYS wait for  
moving parts to stop before performing  
maintenance or service.  
2
72" Belt  
Layout  
3
4
CAUTION: DAMAGED OR WORN BELTS  
may result in injury and/or damage to the unit.  
Check belts for excessive wear or cracks  
often.  
2
50" and 60"  
Belt Layout  
Belt Access  
1. Properly stop and park unit (refer to Owner’s  
Manual).  
1
4
5
OF 1641  
2. Lower the mower.  
1. Long Mower Belt  
2. Short Mower Belt  
3. Springs  
4. Idlers  
3. Place seat in most rearward position.  
4. Remove belt covers.  
5. Mower Clutch  
Sheave  
5. Place foot board in open position (Figure 9).  
6. Secure raised footboard with latch.  
Figure 10  
CAUTION: Use care when releasing idler  
spring tension. Keep body parts well away  
from idlers when performing this operation.  
1
3. Arrange new mower belt(s) on deck (short belt  
first). Retighten short belt idler pivot bolt. Install  
belts on sheaves. Roll belts onto blade sheave last.  
2
5
4. Replace belt covers and return foot board to closed  
position.  
Replacing the Hydro Pump Belt  
1. Properly stop and park unit (refer to unit Owner’s  
Manual).  
4
OF 1802  
3
1. Footboard in open  
position  
3. Support Frame  
2. Remove the mower belt from the mower clutch  
sheave. See replacing Mower Belts.  
4. Pivot  
5. Latch  
2. Footboard in closed  
position  
3. Remove old hydro pump belt by rolling belt off right  
hand hydrostat sheave first. (Figure 11)  
4. Install new pump belt by positioning belt on  
sheaves. Roll belt onto right hand hydrostat  
sheave last.  
Figure 9  
Replacing Mower Belts  
NOTE: Long belt must be removed to remove short  
belt.  
5. Put the mower belt back on mower clutch sheave.  
See Replacing Mower Belts.  
1. Roll long belt off left blade spindle and remove  
from deck.  
2. Roll short belt off right blade spindle and remove  
from deck. Idler pivot bolt must be loosened  
slightly to gain clearance to remove belt from under  
idler pulley (Figure 10).  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
3. Sharpen the beveled edges of the blades in a  
straight line. Do not change the angle of the  
beveled edge. If more than 0.5 inches (12.7 mm)  
are removed from the width of a blade, discard the  
blade. Make sure the sharpened blades are  
balanced. Balance must be held within 1.3 inch  
ounces.  
5
1
6
2
3
4. Put the blades, the flat washers, lock washers, and  
the bolts back on the spindle shafts.  
5. Tighten the bolts to a torque of 70 ft. lbs (95 Nm).  
Put the ignition wires back on the spark plugs.  
4
STEERING CONTROL NEUTRAL  
ADJUSTMENT  
If the unit has excessive creep when the control levers  
are in neutral, adjust as follows: (Figure 13)  
OF 1631  
1. Hydro Belt  
2. Spring  
5. Right Hand  
Hydrostat  
6. Left Hand Hydrostat  
3. Idler  
4. Engine Sheave  
2
Figure 11  
1
TIRES  
2
Before each use, make a visual check of tires.The  
correct air pressure is 12-15 psi (83-103 kn/m2) for the  
rear tires, and 20-25 psi (138-172 kn/m2) for the front  
tires.  
4
3
MOWER BLADES  
NOTE: If mower is used under sandy soil conditions,  
replace mower blades when air lifts become eroded  
through at ends (Figure 12).  
5
6
3
2
4
OF 1820  
1
7
1. Stop Bolts  
5. Parking Brake  
Interlock  
3
2. Pump Levers  
3. Front Ball Joints  
4. Control Levers  
6. Clamping Bolt and  
Slot  
7. Mounting Bolt  
4
Figure 13  
1. Cutting Blade  
2. Square Corner  
3. Air Lift Erosion  
4. Air Lift  
WARNING: This adjustment requires operation  
of the engine and opening of hood. Use extreme  
care to avoid contact with moving parts and hot  
surfaces. Be sure rear of unit is well supported  
and secure before starting engine.  
Figure 12  
Sharpening Mower Blade  
CAUTION: Use sturdy gloves or padding to  
protect hands when working with mower  
blades.  
1. If hydraulic system is cold, run unit for a minimum  
of five minutes, then shut off unit.  
2. Make sure both control levers are in neutral. Raise  
hood.  
1. Turn the engine off. Remove the ignition key.  
2. Remove the bolts, lock washer, the flat washers,  
and blades from the spindle shafts.  
3. With the unit up to and facing a wall, jack the unit  
up so that both drive wheels are off the ground.  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
4. Have someone depress center of seat to activate  
seat switch.  
ADJUSTING THE PARKING BRAKE  
1. The parking brake may be adjusted through the  
use of the jam nuts on the brake rod which push  
against the compression spring which pushes on  
the caliper arm. See Figure 14.  
5. Start the engine and run at about half throttle or  
faster. Release parking brake.  
6. Move the control levers from Forward to Reverse  
several times to make sure controls are free and  
check neutral adjustment. If binding is found,  
correct it.  
2. Turn the nuts further on the rod (clockwise) to  
tighten the brake and further off the rod  
(counterclockwise) to loosen the brake.  
7. Minor adjustments may be made by simply  
adjusting the stop screw which contacts the lever  
on the pump. The screw may be turned in or out to  
bring the unit into neutral.  
3. Ensure when the brake is applied, the caliper arms  
do not contact the return nuts on the rods in front of  
the caliper arms. If they do, back them off slightly.  
4. When installing new pads in the calipers, they must  
be burnished by driving for a short distance (about  
200 feet) with the brake. To do this, bring the  
parking brake lever part way up, while driving  
normally (in a straight line). This quickly breaks-in  
the pads for maximum effectiveness.  
8. If major adjustment is needed, it is best to remove  
the front ball joint from the bottom of the control  
levers and turn the stop screw in or out until neutral  
is found.  
9. Then, with the adjustable arms of the parking brake  
interlock positioned so the clamping bolt is in the  
middle of the slot, adjust the ball joint on or off the  
control link rod so that their mounting bolts fit into  
the slot at the end of the adjustable interlock.  
1
2
1
1. Jam Nuts  
10.Reinstall the front ball joint(s)  
2. Compression Spring  
NOTE: When properly adjusted, the parking brake  
interlock will move upward when the parking brake is  
set and hold the steering control levers in neutral. The  
parking brake starting interlock switch will not be  
depressed unless the steering control levers are in  
neutral. The interlock holds the levers in neutral until  
the parking brake is released.  
PF 1732  
11.Move the control levers, from forward to reverse  
several times to make sure it is adjusted to neutral.  
Readjust if necessary.  
Figure 14  
ADJUSTING UNIT TO TRACK STRAIGHT  
12.Stop the engine.  
Check and adjust tire pressure. Increase pressure on  
side unit tracks to. DO NOT exceed maximum  
recommended tire pressure (refer to Specifications).  
ADJUSTING CONTROL LEVERS  
To be done after neutral has been set. (Figure 13).  
If tire pressure adjustment does not solve tracking  
problem, the limiter bolts at base of handles can be  
adjusted. See Figure 15. Front bolts are for forward  
and rear bolts are for reverse. Lengthen bolts (move  
closer to lever) on side which is too fast.  
1. If desired the steering control levers can be set to  
match (be in line) when in neutral.  
2. Remove front ball joint from bottom of steering  
control lever on side which is going to be adjusted.  
Screw ball joint on or off link rod to hydrostat so  
that control levers align. Replace rod end on lower  
part of steering control lever.  
1. Limiter Bolt  
1
2. Lever  
2
3. If needed, adjust parking brake interlock so that  
interlock is able to move up when both steering  
control levers are in neutral. To do this, loosen the  
clamping bolt on the adjustable member of the  
interlock and slide it in either direction until the  
interlock moves up and latches the ball joint  
mounting bolts.  
Front  
1
4. Tighten the clamping bolt.  
Figure 15  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
14.Tighten rear hex nut on each rod that was  
loosened in step 11.  
LEVELING THE MOWER DECK  
These adjustments should be made on a level surface  
with the tires inflated to the correct air pressure.  
1
Right Side View  
1
1
1
The mower is leveled from side to side with the slots  
where 4 chains fasten to the mower mounting brackets.  
The mower is leveled from front to rear by adjusting the  
rod running down each side of the frame (Figure 16).  
1
1
1. Raise mower deck and insert 3" (7.6 cm) tall blocks  
to support deck.  
1
1
1
1
1
2. Lower deck onto blocks so chains are slack.  
3. Measure from bottom of mower blade end to  
ground.  
Front of Unit  
PF 1920  
1. Rod  
7. Front Mower Lift  
Pivot  
4. Shut off engine. Engage parking brake. Remove  
the ignition key.  
2. Rear Hex Nut  
3. Front Hex Nut  
4. Chains  
8. Rear Mower Lift  
Pivot  
5. Set hydraulic lift cylinder so cut of height reads the  
same as blade height measurement.  
9. Hydraulic Cylinder  
6. Loosen the locknuts on the side where the chains  
are slack and slide the bolt down the slot until the  
chain is tight.  
5. Lock Nuts and Slots  
6. Mower Mounting  
Brackets  
7. Tighten bolt and nuts in mower mounting brackets.  
8. Lift mower and remove blocks.  
Figure 16  
9. Measure height of deck at each side.  
Measurements must be within 1/16" (1.5 mm) of  
each other.  
10.If measurements are out of range, fix by adjusting  
chains on low side of deck.  
11.Once deck is level side to side, measure height of  
deck at middle of front and on both sides of rear.  
Front of deck should be 1/8" (3 mm) lower than  
rear.  
12.To adjust, loosen rear hex nut of the front mower lift  
pivot on each rod.  
13.Turn the front hex nut on each rod until mower is  
1/8" (3 mm) lower in front.  
NOTE: If mower cannot be leveled, it may be neces-  
sary to loosen the rear nut of the rear mower lift pivot to  
get more threads at the front of rod for adjustment.  
After loosening rear nut and adjusting level, tighten  
front nut on rear mower lift pivot.  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
ENGINE  
ENGINE TROUBLESHOOTING  
The following troubleshooting chart is to be used to  
isolate engine problems and give possible causes and  
corrective action responses.  
The troubleshooting key is generic and can be used for  
several types of engines. Use only those possible  
causes and corrective actions that apply to the  
unit.  
TROUBLE  
POSSIBLE CAUSES  
(Refer to Key Below)  
1, 20, 22, 25, 29, 31, 32, 33  
CORRECTIVE ACTION  
Black Exhaust  
repair or replace  
Blue/White Exhaust  
Difficult Starting  
Erratic Running  
4, 20, 25, 31, 33, 34  
repair or replace  
1, 5, 7, 8, 9, 10, 20, 21, 22, 29, 31, 32, 33  
1, 7, 8, 9, 10, 20, 21, 23, 26, 29, 33, 59, 62  
1, 20, 22, 23, 25, 39, 31, 32, 33  
4, 41  
repair or replace  
repair or replace  
Excessive Fuel Consumption  
High Oil Pressure  
Knocking  
repair or replace  
repair or replace  
22, 26, 29, 31, 33, 36, 46, 59  
1, 8, 10, 20, 21, 22, 23, 25, 26, 31, 32, 33  
2, 3, 4, 11  
repair or replace  
Loss of Power or System  
Low Cranking Power  
Low Oil Pressure  
Misfiring  
repair or replace  
repair or replace  
4, 36, 37, 39  
repair or replace  
10, 20, 25, 26, 28, 29, 32  
1, 19, 25,  
repair or replace  
Overheating  
repair or replace  
Poor Compression  
Starts and Stops  
25, 28, 29, 31, 32, 33, 34, 59,  
1, 6, 10, 62  
repair or replace  
repair or replace  
see electrical systems  
see engine service manual  
repair or replace  
Vibration  
20, 23, 25, 26, 29, 33, 45, 49  
2, 11, 45  
Will Not Crank  
Will Not Start  
charge battery or replace  
repair or replace  
1, 10, 62  
see electrical systems  
see engine service manual  
TROUBLESHOOTING KEY  
1
Restriction in air cleaner  
Bad electrical connection  
Faulty starter motor  
Incorrect grade of lubricating oil  
Low cranking speed  
Fuel tank empty  
22  
23  
24  
25  
26  
27  
28  
Incorrect grade of fuel  
Sticking throttle/restricted movement 44  
Exhaust pipe restriction  
Leaking cylinder head gasket  
Overheating  
43  
Faulty suction pipe  
Choked oil filter  
2
3
4
5
6
7
45  
46  
47  
48  
49  
Bad solenoid switch  
Incorrect piston height  
Damaged fan  
Faulty engine mounting  
Incorrectly aligned flywheel and/or  
flywheel housing  
Cold running  
Incorrect tappet adjustment  
Controls not in correct operation  
position  
8
9
Blocked fuel feed line  
Faulty fuel lift pump  
Choked fuel filter  
Battery capacity low  
Air in fuel system  
29  
30  
31  
32  
33  
34  
Sticking valves  
50  
51  
52  
53  
Faulty thermostat  
Restriction in water jacket  
Loose fan belt  
Choked radiator  
Faulty water pump  
Choked breather pipe  
Damaged valve stem oil deflector (if  
fitted)  
Incorrect high pressure pipes  
Worn cylinder bores  
Pitted valves and seats  
Broken, worn or sticking piston ring(s) 54  
Worn valve stems and guides  
Restriction in air cleaner  
10  
11  
12  
13  
14  
Faulty fuel injection pump  
Faulty fuel injectors or incorrect type 35  
55  
56  
15  
16  
17  
18  
19  
Incorrect use of cold start equipment 36  
Worn or damaged bearings  
Insufficient oil in sump  
Bad/defective oil temperature switch 59  
Oil pump worn  
Pressure relief valve sticking open  
57  
58  
Coolant level too low  
Blocked sump strainer  
Broken valve spring  
Exhaust or vacuum pipe leak  
Bad or defective water temperature  
switch  
Faulty cold start equipment  
Broken fuel injection pump drive  
Incorrect fuel pump timing  
Incorrect valve timing  
37  
38  
39  
40  
60  
61  
20  
21  
Poor compression  
Blocked fuel tank vent  
41  
42  
Pressure relief valve sticking closed 62  
Broken relief valve spring  
Bad spark plug(s)  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
To Replace the Clutch  
REMOVING THE ENGINE  
1. Remove the belt by relaxing the idler pulley.  
2. Remove the center bolt.  
1. Place the mower in the full service position.  
2. Disconnect the battery cables, negative first.  
3. Disconnect ignition wires using the connectors.  
4. Remove the belts from the pulley and clutch.  
CAUTION: DO NOT ALLOW the engine  
crankshaft to rotate. Damage to the engine  
may occur.  
5. Unscrew the bolt from the center of the output shaft  
and remove clutch. Refer to "Replacing the  
Clutch".  
3. Disconnect electrical wires.  
4. Remove nut from the anchor bracket.  
5. Pull clutch from shaft.  
6. Remove the square key and the pulley.  
7. Unclamp and remove the fuel line. Plug the fuel  
line and wipe up any spills.  
6. Position new clutch on the shaft by aligning the  
square key on the shaft with the keyway of the  
clutch.  
8. Remove the engine mounting bolts and lift engine  
out the top.  
7. Clutch should be rotated to position the anchor  
bracket with the slot in the stationary shell.  
Replace nut and tighten.  
INSTALLING THE ENGINE  
1. Position the new engine in the chassis, insert  
mounting bolts and tighten.  
8. Replace bolt and washers. Torque to 55 foot  
pounds (74.5 Nm).  
2. Install pulley and then the clutch on the output  
shaft.  
NOTE: Check condition of square key and replace if  
needed.  
3. Place belts on pulley and clutch. Check for proper  
routing of belts.  
4. Connect fuel line and ignition wires.  
5. Connect battery, positive first.  
6. Check oil level and add as needed.  
ELECTRIC CLUTCH  
The motor output shaft has two pulley mechanisms.  
The top pulley is direct drive and powers the hydraulic  
system. The lower pulley is engaged by an electric  
clutch and supplies power to the mower blades. See  
The clutch has no repairable parts.  
If the clutch does not operate, before replacing clutch:  
1. Check the deck for debris that may be blocking  
blades.  
2. Check PTO switch and wire harness for proper  
operation.  
3
1. Electric Clutch  
2. Pulley  
3. Anchor Bracket  
1
2
Figure 17  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
DRIVE TRAIN  
4. Turn the filter by hand, an additional 1/2 to 3/4 turn.  
5. Fill the hydraulic oil reservoir to the top mark on the  
dipstick. It will take about 5 quarts. Use Mobil  
15W50 synthetic oil. Start the engine and run for 1  
to 2 minutes.  
WARNING: Hydraulic Fluid can result in  
severe burns. Fluid in hydraulic system can  
penetrate skin and result in serious injury or  
death.  
6. After shutting off the engine, check the fluid level.  
The dipstick should read the fluid level between the  
high and low markings.  
Be sure to stop the engine before doing any  
work on hydraulic parts.  
Keep body and hands away from pin holes or  
nozzles which expel hydraulic fluid when  
under pressure. Use paper or cardboard, not  
hands, to search for leaks.  
7. Properly dispose of waste oil.  
HYDRAULIC DRIVE FLOW TEST  
Use this procedure for trouble shooting the drive  
system if the unit becomes sluggish or loss of drive  
becomes apparent. This test is to be performed one  
side at a time.  
Insure all hydraulic fluid connections are tight  
and all hydraulic hoses and lines are in good  
condition before applying pressure to system.  
1. Block and jack the unit up so that both drive wheels  
are off the ground.  
WARNING: FOREIGN FLUID INJECTED  
INTO BODY can result in gangrene. Fluid  
must be surgically removed within a few hours  
by a doctor familiar with this form of injury.  
2. Place hood into the full service position.  
3. Verify that the bypass valves are closed and there  
is no binding in the steering control linkage. If  
binding occurs, you will need to correct that  
problem before proceeding to the next steps.  
CHECKING THE HYDRAULIC FLUID  
LEVEL  
A check of the hydraulic fluid level should be made  
daily.  
4. Make sure hydraulic fluid level is correct.  
5. Clean hydraulic hoses at the wheel motor.  
6. Disconnect the hydraulic hoses at the wheel motor,  
note the proper orientation of hoses.  
NOTE: The oil level should be centered between the  
two marks on the dipstick.  
7. Install a bi-directional flow gauge.  
8. Have someone depress center of seat to activate  
seat switch.  
To Check:  
First, remove any dirt that may be around the cap on  
the tank. Remove the dipstick and check the oil level. If  
required, add Mobil 15W50 synthetic oil through the  
dipstick tube. Do not overfill.  
9. Start the engine and run at about 3/4 throttle or  
faster. Release parking brake.  
10.Stroke the appropriate control lever full stroke  
forward and hold.  
CHANGING HYDRAULIC FLUID AND  
FILTER  
The hydraulic fluid and filter should be changed every  
500 hours of operation. To drain the hydraulic oil  
reservoir, remove the filter and catch the hydraulic oil in  
a pan.  
11.Set the hydraulic system pressure to 200-400 PSI  
by using the restriction valve. Note the GPM  
(gallon per minute) flow on the meter. While  
keeping the pump in full stroke, increase the  
hydraulic system pressure to 1000-1200 PSI by  
using the restriction valve. Note the GPM flow on  
the meter. Do not keep hydraulic system under  
pressure for an extended period of time to prevent  
damaging the hydraulic system by inducing too  
much heat to the system.  
The filter for the hydraulic system is located under the  
chassis behind the left rear wheel. It is accessed from  
the rear of the unit.  
To Replace the Filter  
1. Unscrew the filter and dispose of properly. Allow  
tank to drain into container.  
12.Open the restriction valve and move the control  
lever back to neutral. Idle unit down for a few  
seconds and shut off engine.  
2. Place a film of oil on the new filter’s gasket.  
13.The acceptable flow drop would be less than 1  
GPM difference between the low and high  
3. Screw the filter on until it makes contact with the  
sealing surface of the filter head.  
pressure settings. If flow drop is greater than 1  
GPM, the hydro-pump will need to be repaired or  
26  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
replaced. If the flow drop is less than 1 GPM you  
will need to replace the wheel motor.  
18.Lower the cover and start the engine. Run the  
engine for 1 - 2 minutes. After shutting off the  
engine, check the hydraulic fluid level. The dipstick  
should read between the high and low markings.  
REPLACING THE HYDRAULIC PUMP  
The two hydraulic pumps are located inside the chassis  
in front of the engine. The pumps are maintenance free  
and should be replaced in the event of a failure. See  
REPLACE WHEEL MOTOR  
Each drive wheel is mounted to a hydraulic drive motor.  
The drive motors are maintenance free. In the event of  
a failure, the drive motors should be replaced.  
1
2
1. Hydrostat BDP  
Pump  
2
2. Variable-  
1
1
2
Displace Pump  
1. Hub  
2. Hydraulic motor  
Figure 19  
To Replace a Drive Motor  
1. Loosen the wheel lugs 1/4 turn. (Figure 19)  
Figure 18  
To Replace a Hydraulic Pump  
1. Lift cover to full service position.  
2. Remove the cross channel.  
2. Jack the drive wheels off the ground and securely  
support the unit.  
3. Clean hoses and fittings and mark for location.  
4. Disconnect hoses from pump.  
3. Remove the wheel.  
4. Remove the brake caliper assembly by removing  
the two bolts.  
CAUTION: Some fluid will leak out. Clean up  
any spills.  
5. Unscrew the axle bolt at the center of the hub and  
remove the hub. The hub is a taper fit on the axle.  
Use a wheel puller to assist in removal.  
5. Remove belt from pulley.  
6. Remove bolt and washers from end of shaft.  
6. Mark the hydraulic lines and remove.  
7. Loosen pulley lock bolt and slide pulley from shaft.  
Remove and inspect square key. Replace key if  
damaged.  
CAUTION: Some fluid will leak out. Clean up  
any spills.  
8. Remove back bolt on pump and loosen front bolt.  
9. Remove pump.  
7. Unscrew the two bottom bolts and pull the  
hydraulic motor out.  
10.Insert the new pump into position with the front bolt  
in the mounting flange slot.  
8. Remove the four bolt sleeves.  
11.Insert rear bolt and tighten both bolts.  
9. Insert the sleeves into the four bolt holes in the  
new hydraulic motor.  
12.Attach hydraulic hoses to correct ports and tighten.  
13.Position square key in shaft keyway and slide  
pulley into position.  
10.Slide the motor into place and secure with two  
bottom bolts. Apply Loctite to bolts.  
14.Screw the bolt, washer and lock washer into the  
end of the shaft. Tighten securely.  
11.Reattach hydraulic lines to proper ports and  
tighten.  
15.Tighten pulley lock bolt.  
16.Place belt on pulley.  
17.Replace cross channel.  
12.Clean the axle and the inside of the hub. Place hub  
over axle and lightly tap into position. Screw the  
axle nut onto the axle and tighten to 300-400 ft. lbs.  
(406-542 Nm)  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
13.Place the brake caliper into position and insert  
bolts from the inside of the frame outward. Use  
lock washer and nut and tighten.  
2. Clean hose fittings, mark hoses for position and  
disconnect from valve.  
14.Position wheel on hub and insert lug nuts finger  
tight.  
CAUTION: Some hydraulic fluid will leak out  
of the hoses. Clean up any spills.  
15.Tighten lug nuts using the pattern shown in Figure  
20.  
3. Loosen mounting bolts and remove valve.  
4. Mount new valve and tighten bolts.  
5. Connect hoses to proper ports.  
16.Lower the unit to the ground and start the engine.  
Drive forward twenty feet and stop the engine.  
Check the hydraulic fluid level. The dipstick should  
read between the high and low markings.  
6. The hydraulic system is self-bleeding. Check  
hydraulic fluid level after running the engine. The  
dipstick should read between the high and low  
markings.  
1
4
3
2
5
OK 0630  
Figure 20  
Lift Valve  
Figure 21  
HYDRAULIC DECK LIFT PRESSURE TEST  
Use this test for trouble shooting the hydraulic lift  
system if the lift becomes sluggish or loss of lift occurs.  
1. Place unit into the service position.  
2. Clean and disconnect the hydraulic hose at the  
lower side of hydraulic lift valve (Figure 21) and  
install a 1500 psi minimum hydraulic pressure  
gauge using a tee fitting.  
3. Have someone depress center of seat to activate  
seat switch.  
4. Start the engine and run at about 3/4 throttle or  
faster.  
5. Move the deck lift lever to the raise position and  
hold. Relief pressure should be 650 psi minimum  
from the Hydro-Gear auxiliary pump.  
6. If the mower deck height creeps down during  
operation, the hydraulic valve, cylinder or hydraulic  
hose is faulty. You will need to check the condition  
of the hoses and verify that there are no hydraulic  
leaks and the fittings are tight.  
7. Remove the valve.  
REPLACE LIFT VALVE  
The lift valve is located inside the chassis on the left  
side. See Figure 21.  
1. Place hood in full service position.  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
HYDRAULIC DIAGRAM  
992018, 023, 027  
Lift  
Cylinder  
Lift  
Valve  
Deck Lower  
Deck Lift  
B
Return  
A
Inlet  
Left Pump  
A
B
Forward  
High  
Pressure  
A
Right Pump  
B
Right  
Wheel  
Motor  
Left  
Wheel  
Motor  
Forward  
High  
Pressure  
Upper  
Upper  
Reverse  
B
A
High  
Pressure  
Reverse  
High Pressure  
B
A
Lower  
Lower  
Oil  
Filter  
PRESSURE  
RETURN  
SUCTION  
Oil  
Tank  
PD1772  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Models 992020, 029, 030, 032, 033, 034, 035  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
MOWER DECK  
Mower Spindles  
This unit utilizes a maintenance free extended life  
spindle. No routine maintenance is required. In the  
event of bearing failure or a bent shaft the spindle  
should be replaced.  
To Remove the Spindle  
1. Place the unit in service position. Turn key off and  
remove the spark plug wire from contact with spark  
plug.  
2. Remove cutting blade by unscrewing bolt.  
CAUTION: Use sturdy gloves or padding to  
protect hands when working with mower  
blades  
3. Remove belt from pulley.  
4. Remove pulley by unscrewing bolt. Lift pulley off  
the shaft and check placement and condition of  
key.  
5. Unbolt spindle from deck.  
To Install Spindle  
1. Bolt new spindle to mower deck.  
2. Place square key in position and slide pulley down  
the shaft. Tighten bolt and washer.  
3. Replace belts.  
4. Install blade using flat washer, lock washer and  
bolt. Torque to 70 ft. lbs. (95 Nm)  
ANTI-SCALP ROLLERS  
All of the anti-scalp rollers are maintenance free. If any  
roller, shaft, or weldment shows excessive wear it  
should be replaced.  
The caster-type rollers are replaced by removing the  
top pin and dropping the weldment with roller out the  
bottom. Note the position of spacers and bushings for  
installation.  
The rollers are replaced by removing the shaft. Note  
the position of spacers for installation.  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
FRONT SUSPENSION  
SUSPENSION  
The front suspension consists of a weldment that is a  
square tube (Figure 22). A pivot pin holds the axle to  
the chassis. Two caster wheels are attached. The front  
axle is maintenance free except for one grease fitting  
at the chassis for the pivot pin. This fitting is greased as  
needed with Sten Mix Hi-Temp grease or equivalent.  
3
4
1
4
2
1. Pivot Pin  
2. Spindle  
3. Dust Cap  
4. Bearing  
Figure 22  
To Replace the Caster Wheel  
1. Support the axle to keep the wheel off the ground.  
2. Remove dust cap and spindle nut at top of spindle.  
3. Lift axle to allow caster spindle to drop out of  
sleeve, check washers, bearings, and spacers for  
position.  
4. Place washers bearings, and spacers onto the new  
caster spindle.  
5. Insert spindle into the axle sleeve.  
6. Place washer and nut onto the spindle and tighten.  
Fork should pivot freely with no end play.  
7. Replace dust cap.  
32  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
ELECTRICAL  
TOOLS  
ELECTRICAL MEASUREMENTS  
There are some specialized tools and test equipment  
that are needed for electrical repair work. A brief  
description of these follows.  
Long or needle nose pliers - used to connect or bend  
wires and connectors in close quarters.  
Diagonal cutters - used to cut wires or trim connec-  
tions.  
Wire stripper/crimping tool - available separately or  
as a combination tool. Used to strip insulation from  
wires of various sizes, crimp terminals and connector  
or wires.  
Soldering gun or soldering iron - used to solder all  
splices and connections to terminals, connector, etc. A  
soldering gun is faster and more convenient that wait-  
ing for a soldering iron to heat.  
Multimeter - analog or digital, to measure voltage,  
amperage and ohms.  
Tachometer - used to measure engine speed.  
Required to properly test alternator and charging cir-  
cuits where output is dependent upon engine speed.  
Heat gun - used to shrink insulated tubing in place.  
Used to replace electrical tape or insulated sleeving. To  
use, place a piece of shrink tubing over a wire joint,  
heat with the heat gun, until it shrinks tightly around the  
joint.  
Supplies - electrical tape, rosin core solder (never use  
acid or acid core solder on electrical joints), an assort-  
ment of various size terminals, connectors, insulated or  
heat shrink tubing (for use on joints and connections),  
and an assortment of automotive type wire (in several  
colors).  
Gravely Company recommends that all work be done  
in a professional manner. The use of the tubing to  
cover joints and the soldering of connections contribute  
to a professional looking job. In addition to a pleasing  
appearance, repairs made in this manner are more  
likely to withstand vibration. The weakest points in an  
electrical system are the joints where wires are  
attached.  
Replace all defective components with Gravely  
replacement parts only. Engine parts, such as rectifiers  
or alternator components should be secured through  
the nearest engine service center.  
Gravely Company does not recommend attempting to  
repair electrical components. Most do not lend them-  
selves to repair and you would have more money  
invested in "time of repair" than the part would cost and  
the results may not be as good.  
In many electrical circuits, there is some visible effect  
which indicates that the circuit is functioning properly. A  
switch is turned "ON" and a lamp lights. A key is  
turned, a starter motor runs and cranks the engine.  
If the lamp does not light, or the starter motor does not  
run, some means of measuring voltage, current flow,  
resistance and continuity is needed, (continuity means  
there is a complete electrical path through the circuit or  
component.)  
To know exactly what conditions exist in an electrical  
circuit requires AC and DC Voltmeter, AC and DC  
Ammeter, and an Ohmmeter.  
Multimeter  
A single combination meter that does all of these things  
is available. Such a meter is called a Multimeter or Volt-  
Ohm-multitester (VOM). Meters of this kind are avail-  
able in many forms and all change functions and  
ranges with switches, or by plugging test leads into dif-  
ferent jacks. Multimeters are available in two basic  
types, Analog and Digital.  
Analog Meters  
Analog Meters have a needle that moves across a  
scale to give a reading. The longer the scale, the easier  
it is to read and more accurate the reading will be. A  
jeweled movement used in this type of meter is more  
likely to be damaged through rough handling (except  
for overloaded Protected Meters) or by measuring high  
values that exceed the range set on the meter than a  
digital meter. They provide excellent service for the  
money as long as they are used with care.  
Digital Meters  
Digital Meters do not have a movement and are there-  
fore more rugged. The reading shows up directly on a  
display window of some type. Since they read direct,  
no skill in reading the scale is required, nor is it neces-  
sary to set the range. The meter switches the ranges  
automatically. One has only to select the function DC  
Volts, AC Ampere, Ohms, etc.,) connect the test leads,  
and the reading is shown on the display. Because of  
the internal circuitry and the lack of a movement, these  
meters are not likely to be damaged by overloads.  
In the discussions that follow, either type of meter may  
be used. Test procedures are the same. It is best to  
learn proper procedures, even though some meters  
may be more forgiving of mistakes. Where differences  
in use may occur, they will be covered in the discus-  
sion.  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
Voltage Measurement  
There are two basic rules to be remembered when  
using a voltmeter. A voltmeter measures the voltage  
difference between the test leads and the voltmeter is  
always connected across the circuit under test.  
WARNING: EXPLOSIVE GASES can result in  
serious injury or death. ALWAYS keep open  
flames, sparks, or smoking materials away  
from battery.  
Current Measurement  
POISONOUS BATTERY FLUID contains  
sulfuric acid and its contact with skin, eyes, or  
clothing can cause severe chemical burns.  
ALWAYS wear safety glasses and protective  
gear near battery.  
DO NOT TIP any battery beyond 45 degree  
angle in any direction.  
ALWAYS KEEP BATTERIES OUT OF REACH  
of children.  
The two rules to remember when measuring current  
with an ammeter are; an ammeter measures the cur-  
rent that flows through the meter, and to measure cur-  
rent an ammeter must be connected into the circuit.  
The latter rule means that the circuit must be opened,  
and the ammeter wired into it. Because this procedure  
is usually difficult, an ammeter is seldom used for trou-  
bleshooting.  
Resistance Measurement  
An Ohmmeter is used to make resistance measure-  
ments and to check continuity through wires and elec-  
trical components.  
There is one rule to keep in mind when using an ohm-  
meter. The ohmmeter has a self contained battery and  
requires no electrical power. Using the ohmmeter on a  
circuit that has power applied may result in damage to  
the meter.  
WARNING: REVERSE CONNECTIONS may  
result in sparks which may result in injury.  
ALWAYS connect/disconnect cables in proper  
order  
WARNING: Battery posts, terminals and  
related accessories contain lead and lead  
compounds, chemicals known to the State of  
California to cause cancer and reproductive  
harm. Wash hands after handling.  
IMPORTANT: Disconnect the equipment battery when  
making Ohmmeter test or damage to the Ohmmeter  
may result.  
IMPORTANT: An ohmmeter reads the resistance of  
whatever component is connected between the test  
leads. It can be used to check wires, coils, light bulbs,  
or any item that conducts current.  
Battery Electrolyte First Aid  
• External contact: Flush with water.  
BATTERY  
• Eyes: Flush with water for at least 15 minutes and  
get medical attention immediately!  
When charging battery, remove it from unit first. Keep  
batteries out of reach of children. ALWAYS follow  
information provided on battery by battery  
manufacturer. Lead acid batteries generate explosive  
gases. Severe chemical burns can result from  
improper handling of battery electrolyte. Wear safety  
glasses and proper protective gear when handling  
batteries to prevent electrolyte from coming in contact  
with eyes, skin, or clothing.  
• Internal contact: Drink large quantities of water.  
Follow with Milk of Magnesia, beaten egg or  
vegetable oil. Get medical attention immediately.  
IMPORTANT: In case of internal contact, DO NOT  
induce vomiting.  
Inspection, Cleaning, Drying, and Maintenance  
Inspect the top of the battery, terminals, cables,  
terminal posts, and case for any accumulation of dirt,  
corrosion, cracks, or loose or broken parts. Keep  
battery and its terminals clean. Inspect monthly to  
maintain best performance. Replace battery if  
damaged.  
WARNING: ELECTRIC SHOCK may result in  
injury and/or damage to unit.  
DO NOT allow tools or other objects to come  
into contact with both terminals at the same  
time. ALWAYS remove Negative (-) cable first  
to reduce risk of sparks when removing  
battery. ALWAYS connect Positive (+) cable  
first, then connect Negative (-) cable when  
installing battery.  
Remove hold down and bolt and lift battery out. Clean  
or service battery away from unit. Remove corrosion  
from battery terminals and cable connections with wire  
brush, then wash with a weak baking soda solution.  
Scrub the exterior of the battery and cable terminals  
with a nonmetallic brush which has been dipped into a  
mixture of baking soda and water.  
After cleaning, apply a thin coat of grease or petroleum  
jelly to terminals and cable ends to retard corrosion.  
Reinstall battery.  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Check the alternator voltage regulator output (if used)  
at every period maintenance inspection. Over charging  
is a common cause of battery failure.  
Switches are selected with regard to Current rating  
(contacts must be of sufficient size to carry the required  
current), Voltage rating (switches insulated for specific  
voltages), Case or housing (switches that are exposed  
to moisture and must be sealed to prevent moisture  
from entering), and Actuating type (push, pull, rotary,  
momentary contact, or micro switches).  
Battery Charger  
Under normal conditions, the engine alternator will  
have no problem keeping battery charged. When unit  
has set for an extended period of time without  
operation and the battery has been completely  
discharged, a battery charger will be required for  
recharging.  
NOTE: Check that the connections to the switches are  
secure and that a switch is being activated properly  
before performing electrical test on switches. (Safety  
switches on speed selector and clutch levers may be  
out of adjustment and not activating.)  
Charging a New Battery  
IMPORTANT: When checking switches, remove them  
from their respective circuit by disconnecting the wires  
from the switch at the connector(s). Damage could  
result to the meter or machine components if switches  
are left in.  
WARNING: FROZEN BATTERIES CAN  
EXPLODE and result in death or serious  
injury.  
DO NOT charge a frozen battery. Let the  
battery thaw out before putting on a charger.  
Normally Open Switch  
To test a normally open switch (key, headlight, safety,  
or seat) connect the ohmmeter across the switch  
terminals. Meter should indicate open circuit (infinite  
resistance). Activate the switch. The ohmmeter should  
read up scale to zero resistance (Close Circuit). This  
indicates the switch is operating properly. Also check  
from each terminal to the switch case (if case is metal).  
reading should show infinite resistance indicating no  
short to ground.  
IMPORTANT: DO NOT fast charge. Charging at a  
higher rate will damage or destroy battery.  
ALWAYS follow information provided on battery by  
battery manufacturer. Contact battery manufacturer for  
extensive instructions to charge battery.  
1. Put unit into service position to gain access to  
battery.  
2. Disconnect Negative (-) cable first, then Positive  
(+) cable.  
Variation from test results described indicates a  
defective switch.  
3. Remove hold down and remove battery.  
Normally Closed Switch  
4. Place battery on bench or other well-ventilated  
place where electrolyte spill will not create  
damage.  
To test a normally closed switch connect the ohmmeter  
across the switch terminals. Meter should indicate a  
closed circuit (zero resistance). Activate the switch and  
the meter should move to open circuit (infinite  
resistance). Check from each terminal to ground  
(switch case). Meter should show open circuit (infinite  
resistance).  
5. Connect Positive (+) lead of charger to Positive (+)  
terminal. Connect Negative (-) lead to Negative (-)  
terminal.  
6. Charge battery at two and half amps for ten hours  
or until all cells are gassing freely.  
Variation from test results described indicates a  
defective switch.  
7. Reinstall battery into unit and connect Positive (+)  
cable first, then Negative (-) cable.  
Ignition Switch  
NOTE: Refer to the wiring diagram of the unit involved  
to determine switch functions and test using the meth-  
ods described.  
SWITCHES  
Switches either open a circuit to stop current flow or  
close and allow current to flow through.  
The ignition switch incorporates a number of functions,  
although not all functions are used on all equipment.  
The switch has three positions: OFF, RUN, and a  
momentary contact START position. Use an ohmmeter  
to check the continuity of the switch in each position.  
A normally open (N.O.) switch prevents current flow  
until the switch is actuated, completing the circuit and  
allowing current to flow through it. An example is a light  
switch - the lights are off until the switch is actuated  
and the lights go on.  
OFF Position - Should be continuity between contacts  
G and M. These connections ground the engine  
magneto and stop the engine in the OFF position.  
A normally closed (N.C.) switch allows current to flow  
until the switch is actuated, breaking the circuit and  
stopping current flow through it. An example is an  
ignition switch that grounds the magneto when in the  
off position (completing the circuit) but opens the circuit  
when in the ON position allowing the engine to operate.  
RUN Position - Should be continuity between contacts  
B and A. These connections supply power to the rest of  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
the wiring harness. Connections G and M open to each  
other.  
connections. The two large connections carry high  
current to operate the starter motor. The small  
connections are connected to the coil and carry the  
control current.  
START Position - Hold switch in START position while  
testing. There should be continuity between contacts  
S1 and S2. These connections apply power to close  
the solenoid contacts and operate the starter motor.  
To check the solenoid, disconnect the cables to the  
starter motor, turn the ignition switch to the start  
position, and listen for the solenoid to snap inside  
contacts closed.  
In addition to the above test, place the switch in the run  
position and check between each contact and ground  
(metal case) to be sure no terminals are grounded. If  
the switch is operating properly, there will be no  
If no snap is heard, check across the coils with a  
voltmeter. The voltage should read 12 volts with the  
ignition switch in the start position. If no voltage  
appears, the defect is in the start circuit.  
continuity between contacts other that those described.  
SOLENOID AND RELAYS  
If the voltage is correct, turn off the power and check  
continuity of the coil with an ohmmeter. If the coil is  
open, the solenoid is defective and must be replaced.  
Solenoid and relays are both magnetically operated  
devices. Both devices operate on the principle that  
passing a current of electricity through a coil of wire will  
create a magnetic field strong enough to attract a piece  
of iron or steel. Each device uses this principle in a  
slightly different manner.  
If the coil has the proper voltage applied, and the  
continuity check indicates the coil is intact, the solenoid  
plunger is stuck or the contacts are welded shut and  
the solenoid must be replaced.  
Relay - A basic relay consists of a coil of wire wound  
around a soft iron (magnetic) core. When current is  
passed through the coil, the core is magnetized and  
pulls down on a magnetic lever. The lever in turn is  
attached to several switch contacts which open or  
close other electrical circuits. In this fashion, a small  
current can control one or more larger electrical  
currents and actuate several other devices. In most  
cases a relay contact moves only a fraction of an inch  
and the magnetic pull is small.  
If the solenoid snaps shut, but the start does not  
operate, check across the large contacts with an  
ohmmeter. If there is no continuity when the solenoid  
snaps shut, the contacts are defective and the solenoid  
must be replaced.  
FUSES  
Fuses are connected in electrical circuits to protect the  
circuits from damage due to overload or short circuits.  
Fuses are a "weak link" in the circuit. They contain a  
metal link designed to melt when a certain current  
value is exceeded thus opening or disconnecting the  
wiring. Once a fuse blows or melts it must be discarded  
and replaced with a new fuse of the same value.  
Solenoid - A basic solenoid consists of a coil of wire  
wound around a hollow tube. A magnetic core slides  
inside the tube. When current is passed through the  
coil, the core is pulled into the solenoid with  
considerable force. With proper design, a solenoid can  
exert considerable force over a distance of several  
inched. A solenoid can therefore, pull a lever, close a  
heavy contact, or perform other jobs that require a  
straight line pull.  
Since the function of the fuse is to protect the circuit,  
NEVER attempt to defect the protective device by  
bridging or replacing with a device of a higher current  
rating.  
Electrical testing of these devices is simple. Since the  
device either conducts current (and is therefore  
functioning) or the device is open and is therefore  
defective. Use an ohmmeter to check for continuity.  
If a relay or solenoid fails to operate, the cause may be  
either electrical or mechanical.  
To check electrically, connect a voltmeter across the  
coil of the device and activate the circuit that operates  
the relay or solenoid. If the meter indicates no voltage  
is applied, the cause is in the control circuit.  
DIODES AND RECTIFIERS  
Diodes are solid state, semiconductor devices. They  
contain no moving parts and conduct current better in  
one direction than the other. They are electrical "check  
valves" and permit current flow in one direction, but not  
in the other.  
If the meter indicates proper voltage across the coil but  
the device does not function, remove the power,  
disconnect the wiring and check the continuity of the  
coil with an ohmmeter. The meter should indicate  
resistance, in the order of 3 to 5 ohms, if the coil is  
intact. A high resistance indicates an open coil and a  
defective device.  
Diodes allow current to flow through one circuit without  
"backing up" into another. In engine alternator circuits,  
a diode is used to convert current which flows back and  
forth (AC) in a circuit to current which flows only in one  
direction (DC). A device which converts alternating  
current to a direct current is called a RECTIFIER. A  
diode is one type of rectifier.  
There are also a number of mechanical problems that  
may cause the problem.  
The starter solenoid in the Ariens equipment is a  
sealed unit used to actuate the starter motor on the  
engines. These solenoids may have three or four  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
To check a diode, isolate it from the circuit by  
disconnecting one end. With a multitester set on the  
lowest ohms scale setting, measure the resistance in  
one direction, reverse the test leads, and measure in  
the other direction. Readings should be high in one  
direction and low in the other. (If the readings are low in  
both directions, the diode is shorted, and if the  
readings are high, the diode is open.) If the readings  
are the same in both directions, the diode is defective  
and must be replaced.  
IMPORTANT: Diodes are marked to indicate polarity (a  
band on one end, an arrow on the side). They fit on a  
holder only one way.  
Rectifiers  
A battery is charged through the use of an alternator  
located in or on the engine. A charging circuit contains  
a rectifier because alternators produce alternating  
current (AC) and batteries require direct current (DC)  
for charging.  
The rectifier may be built into the engine or it may be  
an external part. It may also contain a regulator to  
prevent overcharging the battery. (Servicing of  
rectifiers built into the engine should be done by an  
approved engine manufacturer’s service center. Such  
a service center has access to the information and  
parts required to test and repair or replace engine  
components, including rectifiers and regulators.)  
Units that contain both a rectifier and regulator are  
tested in a working circuit to make sure the regulator  
portion of the device is operating.  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
WIRING DIAGRAMS  
Models 992018, 020, 027  
PD2110  
PD3230  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Model 992029, 030, 034, 035  
PD3242  
39  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Model 992023  
SEAT  
SWITCH  
SEAT / PTO RELAY  
PINK  
85  
87a  
87 86  
1
2
CAB  
POWER  
SUPPLY  
30  
BLACK  
2
PTO  
SWITCH  
1
W
/
PTO  
CLUTCH  
D
LO  
E
L
7
R
E
PURPLE /  
WHITE  
BLACK  
HOUR  
METER  
Y
4
3
1
2
1
9
PURPLE  
OIL  
LIGHT  
W
BLACK  
LO  
L
YE  
OIL PRESSURE  
FUEL SOLENIOD  
REGULATOR  
         /
BLUE / WHITE  
RED / YELLOW  
PURPLE  
BLACK  
N
OW  
R
SWITCH  
B
START  
RELAY  
ENGINE  
BLACK  
86  
85  
87a  
87  
MAGNETO KILL  
WHITE / BLACK  
30  
STARTER  
OW  
L
YE  
         /
D
E
R
A
B
BLACK  
RED  
RED  
1
A
B
BRAKE  
SWITCH  
FUSE  
30A  
RED  
2
M
BATTERY  
T
LE  
BLACK  
IO  
V
BLACK  
         /
G
D
RE  
S1  
COIL 2  
COIL 1  
BROWN  
RED / VIOLET  
STARTER  
SOLENOID  
S2  
KEY  
SWITCH  
BLACK  
PD3251  
40  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Models 992032, 033  
41  
Download from Www.Somanuals.com. All Manuals Search And Download.  
TROUBLESHOOTING  
TROUBLESHOOTING  
PROBABLE CAUSE  
PROBLEM  
CORRECTION  
1. Disengage PTO.  
Engine does not crank.  
1. PTO engaged.  
2. Parking brake disengaged.  
2. Engage parking brake.  
3. Loose or corroded battery  
cables.  
3. Clean and tighten battery cables  
(see Servicing the Battery on  
page 18).  
4. Discharged battery.  
4. Charge battery (see Charging  
the Battery on page 19).  
5. Faulty starter.  
5. See your Gravely Dealer.  
Engine cranks but does not start.  
1. Fuel tank empty.  
1. Fill fuel tank (see Filling Fuel  
Tank on page 18).  
2. Faulty spark plug.  
3. Air cleaner is plugged or dirty.  
4. Fuel filter is dirty.  
2. Replace spark plug. Refer to  
Engine Manual.  
3. Clean or replace air cleaner.  
Refer to Engine Manual.  
4. Clean or replace fuel filter. Refer  
to Engine Manual  
5. Faulty engine.  
5. Refer to Engine Manual or see  
your Gravely Dealer.  
Battery light does not light up  
when starting engine.  
1. Discharged battery.  
1. Oil pressure is low.  
1. Charge battery (see Charging  
the Battery on page 19).  
Oil pressure light is on.  
1. Refer to Engine Manual.  
Fuel/Water separator light is on.  
1. Fuel/water separator filter dirty  
or damaged.  
1. Clean or replace fuel/water  
separator filter. Refer to Engine  
Manual  
Engine is overheating  
1. Engine oil level is low.  
1. Add engine oil. Refer to Engine  
Manual.  
2. Cooling fins/screen on engine  
plugged with debris.  
2. Clean engine and surrounding  
area.  
Engine continues to run when  
ignition key is in the off position.  
1. Ignition ground wire  
disconnected.  
1. Connect ground wire to clean  
metal surface.  
2. Ignition switch failure.  
2. Replace ignition switch (see your  
Gravely Dealer).  
PTO or mower blades do not  
engage or shuts off.  
1. Operator presence switch not  
depressed.  
1. Depress operator presence  
switch by sitting on seat.  
2. Eye-Q alarm setting is turned  
on.  
2. Turn off the alarm that  
deactivates the PTO on a regular  
schedule. See the Owner’s  
Manual.  
3. The Eye-Q circuitry senses an  
overload to the PTO clutch and  
is shutting off the PTO switch.  
3. Check the mower deck for  
clogging or debris. Check the  
electrical system to the clutch for  
damage or wear.  
4. Faulty PTO switch.  
4. See your Gravely Dealer.  
42  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
TROUBLESHOOTING  
PROBABLE CAUSE  
PROBLEM  
Unit does not drive.  
CORRECTION  
1. Parking brake engaged.  
1. Disengage parking brake.  
2. Transmission bypass levers  
open.  
2. Close transmission bypass  
levers (see Moving Unit Manually  
on page 16).  
3. Hydraulic oil level low.  
3. Add hydraulic oil (see Checking  
Hydraulic Oil Level on page 26).  
4. Faulty hydraulic drive system.  
4. See your Gravely dealer.  
43  
Download from Www.Somanuals.com. All Manuals Search And Download.  
GRAVELY  
A Division of Ariens Company  
655 West Ryan Street  
P.O. Box 157  
Brillion, WI 54110-0157  
920-756-2141  
Fax 920-756-2407  
Download from Www.Somanuals.com. All Manuals Search And Download.  

HANNspree Flat Panel Television DT07 10A1 User Manual
Harbor Freight Tools Doll 92906 User Manual
Harbor Freight Tools Model Vehicle 91132 User Manual
Harbor Freight Tools Washer Dryer 92336 User Manual
HP Hewlett Packard Cable Box HP 8591C User Manual
HP Hewlett Packard Stereo System HP 8671B User Manual
Huawei Cell Phone 616960039235 User Manual
Humminbird Fish Finder GR16 User Manual
Husqvarna Blower BV650 User Manual
Ikelite Digital Camera DSC P200 User Manual