ZT™
Owner/Operator Manual
Manuel du Propriétaire/Utilisateur
Models
915146 – ZT 34
(SN 030000 +)
915148 – ZT 42
(SN 030000 +)
915150 – ZT 50
(SN 030000 +)
915168 – ZT 34 CARB
(SN 030000 +)
915170 – ZT 42 CARB
(SN 030000 +)
915178 – ZT 42
(SN 030000 +)
915180 – ZT 50
(SN 030000 +)
The use of any gasoline exceeding 10% ethanol (E10) or
10% MTBE will void the product warranty.
L’utilisation d’une essence contenant plus de 10%
d’éthanol (E10) ou de 10% de MTBE annulent la garantie.
E10
ENGLISH
FRANÇAIS
04699200B • 4/14
Printed in USA
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Before Attempting to Operate Your
Unit:
1. Make sure all assembly has been
properly completed.
PRODUCT REGISTRATION
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 honored, whether or not the
product registration card is returned. Keep a
proof of purchase if you do not register your
unit.
2. Understand all Safety Precautions
provided in the manuals.
3. Review control functions and operation
of the unit. Do not operate the unit
unless all controls function as described
in this manual.
4. Review recommended lubrication,
maintenance and adjustments.
Customer Note: If the dealer does not
register your product, please fill out, sign and
return the product registration card to
Internet.
5. Review Limited Warranty Policy.
6. Fill out a product registration card and
return the card to the Ariens Company or
UNAUTHORIZED REPLACEMENT
PARTS
DISCLAIMER
Gravely reserves the right to discontinue,
change, and improve its products at any time
without notice or obligation to the purchaser.
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.
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.
NOTE: A complete Parts manual may be
Internet.
DELIVERY
Customer Note: If you have purchased this
product without complete assembly and
instruction by your retailer, it is your
responsibility to:
•
Read and understand all assembly
instructions in this manual. If you do
not understand or have difficulty
following the instructions, contact your
nearest Gravely dealer for assistance.
NOTE: To locate your nearest Gravely dealer,
WARNING: Improper assembly
or adjustments can cause serious
injury.
EN - 3
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SAFETY
WARNING: This cutting machine
CAUTION: POTENTIALLY
HAZARDOUS SITUATION! If not
avoided, MAY RESULT in minor
or moderate injury. It may also be
used to alert against unsafe
practices.
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.
Slopes are a major factor related
to loss-of-control and tip-over
accidents. Operation on all slopes
requires extra caution.
NOTATIONS
NOTE: General reference information for
proper operation and maintenance practices.
IMPORTANT: Specific procedures or
information required to prevent damage to
unit or attachment.
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.
SAFETY DECALS AND
LOCATIONS
ALWAYS replace missing or damaged Safety
Decals. Refer to Figure 2 for safety decal
locations.
Gasoline is extremely flammable
and the vapors are explosive,
handle with care.
Disengage attachment, stop unit
and engine, remove key, engage
parking brake, and allow moving
parts to stop before leaving
operator’s position.
SAFETY ALERTS
Look for these symbols to
point out important safety
precautions. They mean:
•
•
Attention!
Personal Safety Is
Involved!
•
•
Become Alert!
Obey The Message!
The safety alert symbol is used in decals and
with this manual. Understand the safety
message. It contains important information
about personal safety.
WARNING: POTENTIALLY
HAZARDOUS SITUATION! If not
avoided, COULD RESULT in
death or serious injury.
DANGER: IMMINENTLY
HAZARDOUS SITUATION! If not
avoided, WILL RESULT in death
or serious injury.
EN - 4
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7
4
07800401
6
2
5
KEEP HANDS and FEET AWAY
3
1
2
07800403
Figure 2
1. DANGER!
2. DANGER!
Discharge Hazard -
NEVER operate unit
without discharge chute
in operating position.
Thrown objects can
cause injury or damage.
Discharge Hazard -
NEVER direct discharge
toward people, pets or
property. Thrown objects
can cause injury or
damage.
Do not operate mower
unless all guards are in
operating position or
bagger is attached.
Dismemberment Hazard -
NEVER stick hands or feet
under deck or shielded
areas.
Shut off engine, remove
key, and read manual
before servicing or making
adjustments to unit.
EN - 5
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Keep children and others
away from unit while unit is
in operation.
Keep all guards and
shields in place.
3.2 Discharge Hazard
Keep feet and hands away
from all rotating or moving
parts.
Discharge Hazard -
NEVER direct discharge
toward people, pets or
property. Thrown objects
can cause injury or
damage.
DO NOT step or stand in
this area.
Keep children and others
away from unit while unit is
in operation.
3. DANGER!
Do not operate mower
unless all guards are in
operating position or
bagger is attached.
DANGER!
3.3 Tipping Hazard
Read and understand the
operator’s manual before
operating unit.
Avoid tipping hazard.
3.1 Dismemberment Hazard
15
15
DO NOT operate on slopes
over 15°.
To avoid dismemberment
hazard do not put hands
near rotating blades.
DO NOT operate on slopes
over 15°.
To avoid dismemberment
hazard do not put hands
near moving belts.
3.4 Service Hazard
Before servicing unit do the
following:
Keep hands away from all
rotating or moving parts.
EN - 6
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Read owners manual
before servicing or making
adjustments to unit.
Proceed off slope slowly.
Do not try to turn or speed
up.
Set parking brake.
Remove key and
4. DANGER!
disconnect spark plug
before servicing or making
adjustments to unit.
To avoid dismemberment
hazard do not put hands
near moving belts.
3.5 Bystander Hazard
DO NOT operate the unit in
the presence of
bystanders.
Keep hands away from all
rotating or moving parts.
Do not carry passengers.
5. DANGER!
DANGER!
Look behind when
operating the unit in
reverse.
ALWAYS Keep hands and
feet away from discharge
chute.
3.6 Loss of Traction Hazard
If loss of traction is
experienced do the
following:
Dismemberment Hazard -
NEVER put hands or feet
beneath guards and or
shields.
Disengage PTO.
EN - 7
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Only the user can prevent and is responsible
for accidents or injuries occurring to
6. DANGER!
themselves, other people or property.
Read, understand, and follow all safety
practices in Owner/Operator Manual before
assembling, using or working on this mower.
DO NOT touch parts which
are hot from operation.
ALWAYS allow parts to
cool.
ALWAYS remove key from ignition and wire
from spark plug before assembly, or working
on this unit.
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.
7. CAUTION!
No smoking.
ALWAYS check overhead and side
clearances carefully before operation.
ALWAYS be aware of traffic when crossing or
operating along streets or curbs.
Keep children, people, and pets away. Be
alert and shut off unit if anyone enters work
area. Keep children under watchful care of a
responsible adult.
IMPORTANT: DO NOT
overfill.
Fill fuel tank to below
bottom of filler neck.
NEVER allow children to operate or play on
or near unit.
WARNING: Overfilling may cause
severe damage to evaporative
system!
Keep area of operation clear of all toys, and
debris. Thrown objects can cause injury.
Stay alert for hidden hazards, holes, and ruts.
•
•
Never fill fuel tank when engine is
running, hot or unit is indoors. Never
overfill fuel tank.
Avoid uneven or rough terrain. 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.
Replace fuel cap securely and clean
up spilled fuel.
Dust, fog, etc. can reduce vision and cause
an accident. Operate unit only when there is
good visibility and light.
EMISSION CONTROL SYSTEM
This equipment and/or its engine may include
exhaust and evaporative emissions control
system components required to meet U.S.
Environmental Protection Agency (EPA)
and/or California Air Resources Board
(CARB) regulations. Tampering with emission
controls and components by unauthorized
personnel may result in severe fines or
penalties. Emission controls and components
can only be adjusted by an Ariens Company
dealer or an authorized engine
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.
Only trained adults may operate unit. Training
includes being familiar with controls and
actual operation.
manufacturer's service center. Contact your
Ariens Company Equipment Retailer
concerning emission controls and component
questions.
NEVER operate unit after or during the use of
medication, drugs or alcohol.
NEVER allow anyone to operate this unit
when their alertness or coordination is
impaired.
SAFETY RULES
Wear adequate safety gear, sturdy shoes,
and protective gloves.
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.
DO NOT wear loose clothing or jewelry and
tie back hair that may get caught in rotating
parts.
EN - 8
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Protect eyes, face and head from objects that
may be thrown from unit. Wear appropriate
hearing protection. Always wear safety
goggles or safety glasses with side shields
when operating mower.
ALWAYS keep protective structures, guards
and panels in good repair, in place and
securely fastened.
Do not operate without either entire grass
catcher or the discharge guard in place.
Avoid sharp edges. Sharp edges can cut.
Moving parts can cut off fingers or a hand.
DO NOT operate in reverse unless absolutely
necessary. ALWAYS look down and behind
before and while backing; especially for
children.
ALWAYS keep hands and feet away from all
rotating parts during operation. Rotating parts
can cut off body parts.
Follow the manufacturer’s recommendations
for wheel weights or counterweights to
improve stability when using attachments.
ALWAYS keep hands away from all pinch
points.
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 carry passengers – especially
children – even with blades off.
Use extra care when approaching blind
corners or objects that may obscure vision of
hidden obstacles and children.
ALWAYS keep body and hands away from
pin holes or nozzles which eject hydraulic
fluid under pressure.
If you cannot back up a slope or you feel
uneasy on it, do not mow it.
DO NOT touch unit parts which might be hot
from operation. Allow parts to cool before
attempting to maintain, adjust or service.
Operation on slopes may lead to loss of
steering control. When operating on slopes
be prepared to react to an emergency
situation:
NEVER place your hands or any part of your
body or clothing inside or near any moving
part while unit is running.
•
Return steering levers to neutral
position.
NEVER direct discharge towards persons or
property. Thrown objects may ricochet back
towards operator. ALWAYS stand clear of the
discharge area.
•
•
Immediately set parking brake.
Turn off PTO and engine.
Mow up and down slopes, not across them.
Use slow speed on any slope. Tires may lose
traction on slopes even though the brakes are
functioning properly.
ALWAYS disengage attachment, stop unit
and engine, place control levers in neutral,
remove key, engage parking brake, and allow
moving parts to stop before leaving
operator’s position.
Keep all movements on the slope slow and
gradual. DO NOT make sudden changes in
speed or direction.
Use extreme caution on gravel surfaces.
Use extra care while operating machines with
grass catcher or other attachments. They can
affect stability of the machine.
Disengage PTO when attachment is not in
use and when crossing gravel surfaces.
DO NOT operate unit if safety interlock
system is damaged or disabled. Check safety
interlock before each use.
Avoid starting, stopping, or turning on a
slope. If tires lose traction, disengage the
blades and proceed slowly straight down the
slope.
ALWAYS remove key to prevent unauthorized
use.
DO NOT operate on slopes over 15°.
DO NOT operate at too fast a rate. Slow
down before turning.
DO NOT park on slopes unless necessary. If
unit is parked on a slope, ALWAYS chock or
block wheels and set parking brake.
Stop engine before removing grass catcher or
unclogging chute.
DO NOT disengage or bypass transmission
and coast downhill.
DO NOT mow on wet grass. Reduced
traction could cause sliding.
Tow only with a machine that has a hitch
designed for towing. Do not attach towed
equipment except at the hitch point.
DO NOT try to stabilize the machine by
putting your foot on the ground.
Know the weight of loads. Limit loads to those
you can safely control and the unit can safely
handle.
Follow the manufacturer’s recommendations
for weight limits for towed equipment and
towing on slopes.
Maximum Tongue weight: 30 lbs.
Maximum Trailer weight: 300 lbs.
EN - 9
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Do not use hitch with bagger attached.
Do not use on steep hills or slopes.
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.
Do not park on hills when trailer is attached.
Do not use with any ground engaging
equipment.
If fuel is spilled on clothing, change clothing
immediately.
NEVER allow children or others in or on
towed equipment.
Avoid Electric Shock. Objects contacting both
battery terminals at the same time may result
in injury and unit damage. DO NOT reverse
battery connections.
On slopes, the weight of the towed equipment
may cause loss of traction and loss of control.
Travel slowly and allow extra distance to stop.
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.
Use extra care when loading or unloading
unit onto trailer or truck.
Secure unit chassis to transport vehicle.
NEVER secure from rods or linkages that
could be damaged.
NO flames, NO sparks, NO smoking near
battery.
DO NOT transport machine while engine is
running.
ALWAYS wear safety glasses and protective
gear near battery. Use insulated tools.
ALWAYS turn off power to attachment and
properly drain fuel when transporting unit.
DO NOT TIP battery beyond a 45° angle in
any direction.
Keep unit free of grass clippings, leaves, and
other debris. Clean up oil or fuel spills.
ALWAYS keep batteries out of reach of
children.
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.
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.
Reverse connections may result in sparks
which can cause serious injury. Always
connect positive (+) lead of charger to
positive (+) terminal, and negative (-) lead to
negative (-) terminal.
Fuel is highly flammable and its vapors are
explosive. Handle with care. Use only an
approved gasoline container with an
appropriately sized dispensing spout.
ALWAYS disconnect negative (-) cable FIRST
and positive (+) cable SECOND. ALWAYS
connect positive (+) cable FIRST, and
negative (-) cable SECOND.
NO smoking, NO sparks, NO flames.
ALWAYS allow engine to cool before
servicing.
NEVER fill fuel tank when engine is running
or hot from operation.
A frozen battery can explode and result in
death or serious injury. DO NOT charge or
jump start a battery containing frozen fluid.
Thaw the battery before putting on a charger
or jump starting.
NEVER fill or drain fuel tank indoors.
NEVER overfill fuel tank.
Properly remove fuel before tipping unit.
ALWAYS keep protective structures, guards,
and panels in good repair, in place and
securely fastened. NEVER modify or remove
safety devices.
Replace fuel cap securely and clean up
spilled fuel.
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.
DO NOT change engine governor settings or
over-speed engine.
Fumes from engine exhaust can cause injury
or death. DO NOT run engine in an enclosed
area. Always provide good ventilation.
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 maintain unit in safe operating
condition. Damaged or worn out muffler can
cause fire or explosion.
EN - 10
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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.
Never store the machine or fuel container
inside a building where there is an open
flame, such as a water heater.
Shut off fuel (if provided) and allow engine to
cool completely before storing in closed area
or covering unit.
Mower blades are sharp and can cut you.
Wrap the blade(s) or wear gloves, and use
extra caution when servicing them. NEVER
weld or straighten mower blades.
Clean grass and debris from unit, especially
from around muffler and engine, to help
prevent fires.
Rotation of one blade may cause rotation of
the other blades.
For extended storage, clean unit thoroughly.
See storage section and Engine Manual for
proper storage.
Check brake operation frequently. Adjust and
service as required.
Use only attachments or accessories
designed for your unit.
Keep all hardware properly tightened.
Stored energy in springs can cause injury.
Check attachment components frequently. If
worn or damaged, replace with
manufacturer’s recommended parts.
Maintain or replace safety and instruction
labels, as necessary.
ASSEMBLY
NOTE: Do not tighten hardware before
reviewing See “ADJUSTING STEERING
LEVERS” on page 28. If no adjustment is
desired tighten hardware.
WARNING: AVOID INJURY.
Read and understand the entire
Safety section before proceeding.
Tools Required
•
•
Adjustable wrench
Petroleum jelly or dielectric grease
Unpack Unit
Remove unit and all other components from
the shipping container. Engage transmission
bypass lever. See “MOVING UNIT
1
MANUALLY” on page 19. Push unit from
container onto a level surface. Disengage
transmission bypass lever.
3
Connect Battery
See "Install Factory-Installed Battery" on
page 26 and perform steps 5 and 6 in the
installation section.
1. Steering Lever
2. Steering Pivot Arm
3. Steering Lever Hardware
Place Unit in Operating Position
(Figure 3)
Figure 3
NOTE: The seat is shipped with the seat
positioned as far back as possible.
Check Engine Oil Level
Refer to Engine Manual.
1. Push steering levers aside and tip seat
up.
2. Adjust the seat as needed. See “Seat
Adjustment” on page 16.
3. Remove hardware from top hole of the
steering lever (Figure 3). Slide steering
lever back to align slot with hole at the
top of the steering pivot arm.
EN - 11
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Check Tire Pressure
CAUTION: Avoid injury!
Explosive separation of tire and
rim parts is possible when they
are serviced incorrectly:
•
Do not attempt to mount a
tire without the proper
equipment and experience
to perform the job.
•
•
Do not inflate the tires
above the recommended
pressure.
Do not weld or heat a
wheel and tire assembly.
Heat can cause an
increase in air pressure
resulting in an explosion.
Welding can structurally
weaken or deform the
wheel.
•
Do not stand in front or
over the tire assembly
when inflating. Use a clip-
on chuck and extension
hose long enough to allow
you to stand to one side.
See "SPECIFICATIONS" on page 34.
Level Mower Deck
See “LEVELING AND ADJUSTING PITCH
OF MOWER DECK” on page 23.
Fill Fuel Tank
Fill fuel tank. DO NOT OVERFILL! See
"FILLING FUEL TANK" on page 17.
Check Safety Interlock System
failure and improper operation of
unit can result in death or serious
injury. Check system before each
use to make sure it is functioning
properly.
See "Safety Interlock System" on page 14.
Check function of all controls
See "OPERATION" on page 14.
EN - 12
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CONTROLS AND FEATURES
3
5
6
12
1
4
7
14
10
9
915148, 150, 170, 178, 180
13
8
2
915146, 168
11
1
2
1
11
Figure 4
1. Ignition Switch
2. PTO Switch
3. Seat
11. Throttle/Choke Lever
12. Seat Adjustment Lever
(915148, 150, 170, 178, 180)
13. Height of Cut Selector Lever
4. Fuel Level
5. Steering Levers
6. Fuel Tank
14. Washout Port
(915148, 150, 170, 178, 180)
7. Mower Lift Pedal
8. Mower Deck
9. Discharge Chute
10. Parking Brake Lever
EN - 13
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OPERATION
Safety Interlock System
WARNING: AVOID INJURY.
Read and understand the entire
Safety section before proceeding.
WARNING: Safety interlock failure
and improper operation of unit can
result in death or serious injury.
Check system before each use to
make sure it is functioning
properly.
CONTROLS AND FEATURES
See Figure 4 for all controls and features
locations.
Perform the following tests to ensure the
safety interlock system is working properly. If
the unit does not perform as stated contact
your Gravely dealer for repairs.
Test
1
Steering Lever
Neutral Position
Neutral Position
Neutral Position
Out of Neutral Position
Neutral Position
PTO
Off
On
Off
Off
On
Parking Brake
Engaged
Engine
Starts
2
Engaged
Doesn’t Start
Doesn’t Start
Shuts Off
Shuts Off
3
Disengaged
Disengaged
Engaged
4*+
5*+
* Test with engine running.
+ Operator lifts off seat.
Ignition Switch
Throttle/Choke Lever
(915148, 150, 170, 178, 180)
Operate ignition switch
with a removable key.
Ignition switch has three
positions: Stop (1),
Run (2), Start (3). See
"STARTING AND
Choke (1) – Use to start a cold
engine. Pull lever up for choke.
Push lever down once unit is
started.
2
1
3
SHUTTING OFF
Fast (2) – Increases engine
speed.
ENGINE" on page 18 for
detailed instructions on
how to start engine.
Slow (3) – Decreases engine
speed.
EN - 14
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Throttle/Choke Lever
(915146, 168)
2
4
1
Choke (1) – Use to start a
cold engine. Push throttle
lever past detent for choke to
start a cold engine. Pull
throttle lever back past detent
to close choke for a warm
engine.
1
2
3
Fast (2) – Increases engine
speed.
NOTE: To stop, return both steering levers to
neutral.
Slow (3) – Decreases engine
speed.
NOTE: The steering levers must be in the
neutral position to start the engine.
3
NOTE: The parking brake must be
disengaged prior to moving the steering
levers from the neutral position.
Parking Brake Lever
Engages (2) and
disengages (1) parking
brake.
Height of Cut
(Figure 5)
1
2
1. Press the mower lift pedal to raise the
deck.
2. Position height of cut selector lever at
the desired setting in the height of cut
bracket.
3. Release mower lift pedal.
Power Take-Off (PTO) Switch
Engages (2)
and
2
3
1
1
disengages
(1) mower
blades.
2
Steering Levers
•
•
•
Reverse (1) – Pull both steering levers
backward.
Forward (2) – Push both steering
levers forward.
1. Mower Lift Pedal
2. Height of Cut Selector Lever
3. Height of Cut Bracket
Left (3) – Pull left steering lever back
or push right steering lever forward or
a combination of both.
Figure 5
•
Right (4) – Pull right steering lever
back or push left steering lever
forward or a combination of both.
EN - 15
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NOTE: Wash the underside of the mower
after each use to prevent grass buildup and
improve mulch action and clipping dispersal.
Seat Adjustment
(915148, 150, 170, 178, 180)
(Figure 6)
Push lever back and slide seat forward or
backward to the desired position. Release
lever to lock seat in position.
1
3
4
2
5
1. Deck Port
2. Hose Coupling
3. Lock Collar
4. Mower Deck
Figure 6
5. Standard Garden Hose
Seat Adjustment
(915146, 168)
Figure 7
1. Tip the seat forward. See “TIPPING
SEAT FORWARD” on page 22.
1. Park the unit on a level surface, within
reach of hose and in a location where
the dispersal of wet grass clippings is
acceptable.
2. Loosen mounting hardware and slide
seat forward or backward to desired
position. Tighten mounting hardware
(figure 9).
2. Disengage the PTO switch, shut off the
engine, remove key, engage parking
brake and allow unit to cool for at least
30 minutes.
3. Tip seat back.
Towing/Trailer Hitch
(915148, 150, 170, 178, 180)
IMPORTANT: Do not wash the unit with water
when the unit is warm from operation. Water
can seep into bearings and cause damage.
IMPORTANT: Tow only equipment rated for
the correct tow and tongue weight.
3. Attach the hose coupling to a standard
garden hose connected to a water
supply.
Units equipped with trailer hitch are rated for
30 lbs tongue weight and should not pull
more than 300 lbs.
4. Pull back the lock collar of the hose
coupling and push the coupling onto the
deck port until the coupling it tightly in
place. Release the lock collar to lock the
coupling to the deck port.
Washout Port
(915148, 150, 170, 178, 180)
(Figure 7)
NOTE: Apply petroleum jelly to washout
fitting O-ring to allow the coupling to slide on
easier and to protect the O-ring.
WARNING: A broken or missing
deck port can result in exposure to
harmful thrown objects or blade
contact.
NOTE: The coupling contains a valve that will
not allow water flow unless coupling is
attached to washout fitting. Water supply
should be turned off before attaching coupling
to the fitting.
Replace broken or missing deck
port before using unit.
NEVER put your hands or feet
under the mower or through
openings in the mower.
5. Lower deck to lowest cutting height.
6. Turn the water supply on high.
EN - 16
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NOTE: If water leaks excessively from hose
coupling onto top of deck, coupling may not
be fully seated onto washout port. Turn off
water supply and repeat steps 4 through 6.
Use firm pressure while installing coupling
onto washout port.
IMPORTANT: DO NOT OVERFILL! This
equipment and/or its engine may include
evaporative emissions control system
components, required to meet EPA and/or
CARB regulations, that will only function
properly when the fuel tank has been filled to
the recommended level. Overfilling may
cause permanent damage to evaporative
emissions control system components. Filling
to the recommended level ensures a vapor
gap required to allow for fuel expansion. Pay
close attention while filling the fuel tank to
ensure that the recommended fuel level
inside the tank is not exceeded. Use a
portable gasoline container with an
WARNING: When using the deck
wash system, NEVER engage the
deck from any position other than
the operator’s seat.
DO NOT engage deck in the
presence of ANY bystander.
7. From the operators seat, start the
engine and engage the PTO. Allow unit
to run as needed - typically 2 to 3
minutes.
appropriately sized dispensing spout when
filling the tank. Do not use a funnel or other
device that obstructs the view of the tank
filling process.
NOTE: Water spraying from discharge chute
should change from green to clear when deck
is clean.
4. Replace fuel cap and tighten.
5. ALWAYS clean up spilled fuel.
GASOLINE
IMPORTANT: ALWAYS use gasoline that
meets the following guidelines:
8. Disengage the PTO, turn off engine,
remove key and wait for all moving parts
to stop.
9. Turn the water supply off and remove
coupling from the washout fitting.
•
•
Clean, fresh gasoline.
A minimum of 87 octane/87 AKI
(91 RON). High altitude use may
require a different octane. Consult
your engine manual.
NOTE: If the mower deck is not clean after
one washing, soak it and let stand for 30
minutes. Then repeat process.
10. After cleaning the mower deck, run the
unit again for 2 to 3 minutes to remove
access water.
•
•
Gasoline with up to 10% ethanol
(gasohol) or up to 10% MTBE (methyl
tertiary butyl ether) is acceptable.
Fuel Level
Use of any gasoline other than those
approved above will void the engine
warranty. If the pumps are not marked
for the content of alcohol or ethers,
check ethanol and MTBE levels with
the fuel supplier.
Slot in seat plate shows the fuel
level in the tank. Refill when
level reaches bottom of slot.
•
•
Do not modify the fuel system to use
different fuels.
Never mix oil and gasoline.
NOTE: All gasoline is not the same. If the
engine experiences starting or performance
problems after using a new gasoline, switch
to a different fuel provider or fuel brand.
FILLING FUEL TANK
IMPORTANT: DO NOT OVERFILL!
To add fuel to the fuel tank:
1. Clean fuel caps and surrounding area to
prevent dust, dirt, and debris from
entering fuel tanks.
IMPORTANT: Excessively oxygenated or
reformulated fuels (fuels blended with
alcohols or ethers) can damage the fuel
system or cause performance problems. If
any undesirable operating problems occur,
use a gasoline with a lower percentage of
alcohol or ether.
2. Remove fuel caps.
IMPORTANT: Refer to Engine Manual for
correct type and grade of fuel.
3. Fill fuel tank to the bottom of filler neck.
See "SPECIFICATIONS" on page 34 for
fuel tank capacity.
EN - 17
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5. Wait until the engine is running smoothly
before operation.
Fuel Stabilizer
Gasoline left in the fuel system for extended
periods without a stabilizer will deteriorate,
resulting in gum deposits in the system.
These deposits can damage the carburetor
and the fuel hoses, filter and tank. Prevent
deposits from forming in the fuel system
during storage by adding a quality fuel
stabilizer to the fuel. Follow the
IMPORTANT: Allow the engine to warm up
several seconds to several minutes
depending on ambient temperature.
Stopping the Engine
1. Stop unit.
2. Disengage PTO.
3. Set throttle lever to slow.
recommended mix ratio found on the fuel
stabilizer container.
4. Turn ignition switch to off position and
remove key.
STOPPING IN AN EMERGENCY
5. Set parking brake.
WARNING: Operating unit on
slopes may lead to loss of
steering control. When operating
on slopes be prepared to react to
an emergency situation.
OPERATING MOWER
1. Start engine.
2. Set throttle lever to fast.
IMPORTANT: Never engage PTO if mower is
plugged with grass or other material.
3. Engage PTO to start mower blades. It
will take 2 – 3 seconds for the blades to
engage.
1. Return steering levers to neutral position.
2. Immediately set parking brake.
3. Turn off PTO and engine.
NOTE: The parking brake must be
disengaged prior to moving the steering
levers from the neutral lockout position.
NOTE: This unit is equipped with the return to
neutral function. The control arms will
automatically return gradually to neutral when
released from the forward position.
4. Release parking brake.
5. Use steering levers to move the unit.
6. Disengage PTO to stop mower blades.
STARTING AND SHUTTING OFF
ENGINE
TRANSPORTING UNIT
Starting the Engine
ALWAYS shut off engine, set parking brake,
remove key, and properly remove fuel 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.
NOTE: Disengage the PTO, place the
steering levers in neutral, and engage the
parking brake prior to starting the engine.
1. If the engine is cold apply choke. If the
engine is warm or hot, do not use choke.
See “Throttle/Choke Lever” on page 14.
FOR BEST PERFORMANCE
Cut grass when it is dry.
2. Put the ignition key in the switch and
turn it to the Start position.
IMPORTANT: DO NOT operate starter for
more than 10 seconds per minute as damage
can occur.
Keep mower blades sharp.
Keep mower deck properly leveled.
Do not set height of cut too low. For very tall
grass, mow twice.
3. As soon as the engine starts, release the
key.
Do not travel too fast.
NOTE: Do not turn off the choke immediately
after engine starts. If the engine is cold or the
ambient temperature is low the engine may
stall.
Mow with the engine set at full throttle.
When mulching, only remove one-third of
grass length per cutting.
Discharge clippings into areas already cut.
Vary cutting pattern with each mowing.
4. After starting the engine, gradually set
choke to off position. See
“Throttle/Choke Lever” on page 14.
Do not allow grass or debris to collect inside
of mower deck. Clean after each use.
IMPORTANT: Be sure choke control is fully
disengaged. Engine will not run smoothly and
will smell like fuel if operating unit with partial
choke.
EN - 18
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MOVING UNIT MANUALLY
(Figure 8)
WARNING: DO NOT disengage
or bypass transmission and coast
downhill.
Pull the bypass lever out and lock it in place,
and then release the parking brake to push
the unit by hand.
Push the bypass lever in to drive the unit
normally.
NOTE: There are two bypass levers; one on
each side of the unit.
1
2
1. Bypass lever pulled out to push the unit
by hand.
2. Bypass lever pushed in to drive the
unit.
Figure 8
EN - 19
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MAINTENANCE SCHEDULE
NOTE: To have full access to the engine, the
WARNING: AVOID INJURY. Read
and understand the entire Safety
section before proceeding.
seat must be tipped forward "TIPPING SEAT
FORWARD" on page 22 and the hood
opened "MOWER DECK REMOVAL AND
INSTALLATION" on page 22.
IMPORTANT: Proper maintenance can
prolong the life of unit. The following chart
shows the recommended service schedule.
Refer to the maintenance instructions in the
Engine Manual for additional information.
Interval Task
Action
Each Use Check
Safety
WARNING: Safety interlock system failure and improper
does not function as described, do not operate until repairs
Interlock
System
are made. "Safety Interlock System" on page 14
Check
Parking
Brake
Engage parking brake and engage transmission bypass lever. See
“MOVING UNIT MANUALLY” on page 19. Push unit. If unit rolls,
contact your Gravely dealer.
Clean
Unit
Clean engine, battery, seat, etc. of all dirt and debris. Do not use
solvents, hard cleaners, or abrasives. For deck cleaning instructions
see "Washout Port" on page 16.
NOTE: Protect painted surfaces with automotive type wax.
IMPORTANT: Do not spray the unit with water, especially when the
unit is warm from operation.
Check
Tires
See "SPECIFICATIONS" on page 34 for correct tire pressure.
CAUTION: Avoid injury! Explosive separation of tire and rim
parts is possible when they are serviced incorrectly:
•
Do not attempt to mount a tire without the proper equipment
and experience to perform the job.
•
•
Do not inflate the tires above the recommended pressure.
Do not weld or heat a wheel and tire assembly. Heat can cause
an increase in air pressure resulting in an explosion. Welding
can structurally weaken or deform the wheel.
•
Do not stand in front or over the tire assembly when inflating.
Use a clip-on chuck and extension hose long enough to allow
you to stand to one side.
Check
Mower
Blades
Check for worn or damaged mower blades. See “SHARPENING
MOWER BLADE” on page 24.
EN - 20
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Interval Task
Action
Each Use Follow
Engine
Perform scheduled engine maintenance.
Refer to Engine Manual for detailed
instructions.
Manual
Mainten-
ance
Schedule
cap and attach the oil drain hose,
supplied in the lit pack, to the drain plug.
Rotate the drain to the left to allow oil to
drain. Turn the drain to the right to close.
Oil Drain Plug
25 Hours Check
Keep battery and battery terminals clean. See “Cleaning Battery and
Battery Cables” on page 27.
or Every
Season
Battery
Lubricate
Unit
1. Apply grease to zerk (1) on each front wheel.
2. Apply grease to quick adjust seat mechanism through slots (2) on
bottom side of seat plate. Work grease into mechanism by sliding
seat back and forth repeatedly.
1
2
50 Hours Check
Check mower blade mounting hardware and all other fasteners.
or Every
Season
Fasteners Replace fasteners that are missing or damaged. Tighten all nuts and
bolts to the correct torque values.
100 Hours Check All Replace worn or deteriorated belts.
or Every
Season
Belts
•
Check hydrostatic belt. See "REPLACING HYDROSTATIC
BELT" on page 30 for hydrostatic belt location.
•
Check PTO belt. See "REPLACING PTO BELT" on page 29 for
PTO belt location.
EN - 21
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SERVICE AND ADJUSTMENTS
MOWER DECK REMOVAL AND
INSTALLATION
WARNING: AVOID INJURY.
Read and understand the entire
Remove
Safety section before proceeding.
(Figure 10)
1. Remove PTO belt from the engine drive
pulley. See “REPLACING PTO BELT” on
page 29.
TIPPING SEAT FORWARD
(Figure 9)
Move steering levers to neutral position and
rotate handles outward. Tip seat forward.
bracket.
3. Disconnect front and rear trunnions from
the lift arms on both sides of the unit by
removing the 3/8 nuts. Keep hardware
for reinstallation.
3
4. Slide mower deck out from under unit.
Install
(Figure 10)
1. Slide mower deck under unit.
2. Connect drag link to front deck bracket.
3. Connect front and rear trunnions to the
lift arms on both sides of the unit using
3/8 nuts.
1
2
4. Install PTO belt on the engine drive
pulley. See “REPLACING PTO BELT” on
page 29.
1. Seat Tipped Forward
2. Mounting Hardware
3. Steering Levers
5. Level and adjust pitch of mower deck.
See “LEVELING AND ADJUSTING
PITCH OF MOWER DECK” on page 23.
Figure 9
7
2
5
7
6
1
6
3
4
1. Rear Trunnion
2. PTO Belt
3. Mower Deck
4. Drag Link
5. Front Trunnion
6. Lift Arms
7. Nuts
Figure 10
EN - 22
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The Forward Pitch Of The Mower
Blades
(Figure 12)
LEVELING AND ADJUSTING
PITCH OF MOWER DECK
NOTE: Adjust on a level surface, with the
tires inflated to the correct air pressure. See
“SPECIFICATIONS” on page 34.
•
Should be 0" (0 cm) to 1/4" (0.635 cm)
pitched forward.
Three measurements are required to level
and adjust the pitch of the mower deck.
NOTE: This measurement must be taken
when the mower blades ends point forward.
1. The distance from the mower blades to
the ground.
Forward Pitch of Mower Blades
2. The forward pitch of the mower blades.
1
3
2
3. The pitch of the mower blades from
side-to-side.
The Distance From The Mower
Blades To The Ground
(Figure 11)
Forward Pitch = 0" (0 cm)
to 1/4" (0.635 cm)
•
In the lowest cutting position should be
1-1/2" ± 1/4" (3.175 cm ± .635 cm).
•
In the highest cutting position should
be 4-1/2" ± 1/4" (10.795 cm ±
.635 cm).
1. Mower Deck
2. Mower Blade
3. Ground
Lowest Cutting Position
1
2
3
Figure 12
The Pitch Of The Mower Blades From
Side To Side
(Figure 13)
•
Should be within 1/4" (0.635 cm) as
measured on each side of the mower
deck.
1-1/2" ± 1/4" (3.175 cm ± 0.635 cm)
NOTE: This measurement must be taken
when the mower blade ends point left and
right.
Highest Cutting Position
1
3
2
Side to Side Pitch
1
2
3
4-1/2" ± 1/4" (10.795 cm ± 0.635 cm)
1. Mower Deck
2. Mower Blade
3. Ground
Figure 11
1/4" (0.635 cm) from Side to Side
1. Mower Deck
2. Mower Blade
3. Ground
Figure 13
EN - 23
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Adjusting The Mower Deck To Adjust
Mower Blade Height And Pitch
(Figure 14)
REPLACING MOWER BLADE
Remove
(Figure 15)
NOTE: Adjusting the mower deck will adjust
the height and pitch of the mower blades.
CAUTION: Mower blades are
sharp and can cut you. Wrap the
blades or wear gloves, and use
extra caution when servicing
them.
1. Adjust the trunnions first and re-take the
three measurements required to level
and adjust the pitch of the mower deck.
These measurements are:
a. The distance from the mower
blades to the ground.
1. Block mower blades to prevent rotation.
b. The forward pitch of the mower
blades.
blades from spindles.
c. The pitch of the mower blades
from side to side.
Install
(Figure 15)
Adjust Trunnions:
1. Install mower blades on spindles with
mounting hardware.
1. Using an adjustable or open ended
wrench tighten or loosen the lock nut on
top.
2. Torque 5/8" nut to 100 to 120 lbf-ft (136
to 163 N•m).
NOTE: To avoid over-adjustment note which
nuts have been adjusted and the amount
each has been loosened or tightened.
1
2
2. Using the same tool, tighten the bottom
bottom hex nut to lower the deck.
3. Tighten the lock nut on top to secure the
link in the desired location.
4. Repeat step 1 as needed until all three
measurements (a, b, and c) are within
the tolerances specified.
3
4
2
3
1. Spindle
2. Blade
3. Washer
4. 5/8" Nut
Figure 15
4
1
SHARPENING MOWER BLADE
CAUTION: DO NOT sharpen
mower blade while on unit. An
unbalanced mower blade will
cause excessive vibration and
eventual damage to unit. Check
mower blade balance prior to
reinstalling mower blades.
NEVER weld or straighten mower
blades.
1. Trunnion
2. Mower Deck
3. Lock Nut
4. Hex Nut
Figure 14
EN - 24
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1. Remove mower blade from unit. See
“REPLACING MOWER BLADE” on
page 24.
SERVICING THE BATTERY
NOTE: Unit comes equipped with a
maintenance-free battery that requires no
regular maintenance except cleaning the
terminals.
Gravely recommends having mower blades
sharpened by a professional. Contact your
Gravely dealer.
Discard mower blade if (Figure 16):
WARNING: Battery posts,
•
more than 1/2" (1.27 cm of metal is
removed.
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.
•
•
the air lift erosion area is eroded.
the mower blade is bent or broken.
Do not change angle of cutting edge or round
the corner at the end of mower blade.
2. Sharpen mower blade by removing an
equal amount of material from each end
of mower blade.
Factory-Installed Battery Removal
3. Check mower blade balance by sliding
mower blade on an unthreaded bolt. If
blade is balanced, it should remain in a
horizontal position. If either end of
mower blade moves downward, sharpen
the heavy end until mower blade is
balanced.
Remove Factory-Installed Battery
(Figure 17)
1. Lower deck to the lowest cutting height.
2. Tip seat forward. See “TIPPING SEAT
FORWARD” on page 22.
3. Disconnect negative (–) cable first, then
positive (+) cable.
4. Install mower blade on unit. See
“REPLACING MOWER BLADE” on
page 24.
NOTE: Do not cut cable tie securing positive
cable to battery hold-down bracket unless
installing U1 battery.
DO NOT Sharpen to this Pattern
2
3
5
Sharpen to this Pattern
Discard if
more than
1/2"
1
8
6
4
7
2
(1.27 cm)
1. Positive (+) Terminal
2. Positive (+) Cable
1
3. Battery Hold-Down Bracket
4. Battery
5. Negative (–) Terminal
6. Negative (–) Cable
7. Nut
1. Air Lift Erosion
2. Cutting Edge
Figure 16
8. Bolt
Figure 17
EN - 25
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4. Remove nut and bolt securing battery
hold down bracket. Save for
reinstallation.
U1 Battery Installation
1. Remove factory battery. See “Remove
Factory-Installed Battery” on page 25.
mounted through the underside of the frame.
Place hand beneath frame to catch loose
bolt.
NOTE: Be sure to cut cable tie connecting
positive battery cable to battery hold down
bracket.
5. Remove battery from unit.
2. Set battery inside the frame, underneath
the seat with terminals positioned as
shown (Figure 19).
Install Factory-Installed Battery
(Figure 17)
3. Place battery hold down bracket on top
of the battery. Attach the curved end of
the bracket in the upper mounting hole
in the wall of the frame (Figure 18).
1. Tip seat forward. See “TIPPING SEAT
FORWARD” on page 22.
2. Set battery inside the frame, underneath
the seat with battery terminals
positioned as shown (Figure 17).
4. Position bolt through the mounting hole
nearest to the battery and through
mounting bracket. Secure with nut.
3. Place battery hold down bracket on top
of the battery. Hook the curved end of
the bracket in the lower mounting hole in
the wall of the frame (Figure 18).
IMPORTANT: Tighten nut until battery is
secure and will not move or rattle in the
frame.
4. Position bolt through the mounting hole
nearest to the battery and through
mounting bracket. Secure with nut.
3
5
2
1
IMPORTANT: Tighten nut until battery is
secure and will not move or rattle during
operation. DO NOT overtighten.
2
1
4
8
7
6
1. Positive (+) Terminal
2. Positive (+) Cable
3. Battery Hold-Down Bracket
4. Battery
5. Negative (–) Terminal
6. Negative (–) Cable
7. Nut
1
2
Figure 19
2. U1 Battery Mounting Hole
Figure 18
5. Connect positive (+) cable first, then
negative (–) cable.
5. Connect positive (+) cable first, then
negative (–) cable.
6. Apply petroleum jelly or dielectric grease
to battery cable ends and terminals.
6. Apply petroleum jelly or dielectric grease
to battery cable ends and terminals.
7. Tip seat back. See “TIPPING SEAT
FORWARD” on page 22.
7. Tip seat back. See “TIPPING SEAT
FORWARD” on page 22.
EN - 26
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4. Charge battery according to battery
charger and battery manufacturers’
instructions.
Cleaning Battery and Battery Cables
(Figure 17)
1. Tip seat forward. See “TIPPING SEAT
FORWARD” on page 22.
5. Install battery on unit. See “Factory-
Installed Battery Removal and
2. Disconnect negative (–) cable first, then
positive (+) cable.
Jump-Starting
3. Clean battery cable ends, negative (–)
terminal, and positive (+) terminal with a
wire brush and rinse with a weak baking
soda solution.
Gravely does not recommend jump-starting
your unit. Jump-starting can damage engine
and electrical system components. See your
engine manual for more detailed information.
4. Connect positive (+) cable first, then
negative (–) cable.
CARBON CANISTER FILTER
(If Equipped) (Figure 20)
5. Apply petroleum jelly or dielectric grease
to battery cable ends and terminals.
6. Tip seat back. See “TIPPING SEAT
FORWARD” on page 22.
2
Charging the Battery
(Figure 17)
WARNING: FROZEN
BATTERIES CAN EXPLODE and
result in death or serious injury.
DO NOT charge a frozen battery.
Let the battery thaw before
charging.
1
1. Carbon Canister
2. Carbon Canister Filter
Follow First Aid directions for contact with
battery fluid.
•
•
External Contact: Flush with water.
Figure 20
Eyes: Flush with water for at least 15
minutes and get medical attention
immediately!
1. Check the carbon canister filter for
debris accumulation every time the unit
is filled with fuel. Remove any buildup.
•
Internal Contact: Drink large quantities
of water. Follow with Milk of Magnesia,
beaten egg or vegetable oil. Get
medical attention immediately!
2. Clean or replace the carbon canister
filter whenever the engine air filter is
cleaned or replaced.
•
In case of internal contact, DO NOT
induce vomiting!
IMPORTANT: DO NOT fast charge. Charging
at a higher rate will damage or destroy
battery.
IMPORTANT: ALWAYS follow information
provided on battery and battery charger.
Contact battery and battery charger
manufacturers’ for detailed instructions.
1. Remove battery from unit. See “Factory-
Installed Battery Removal and
Installation” on page 25.
2. Place battery in a well-ventilated area.
3. Connect positive (+) lead of charger to
positive (+) terminal, and negative (–)
lead of charger to negative (–) terminal.
EN - 27
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ADJUSTING STEERING LEVERS
(Figure 21)
Rotate this end away from the operator
position to move the steering levers in.
Adjustment 3
1
Adjustment 1
3
Rotate this end away from the operator
Figure 22
2
3. Adjust Steering Lever Forward or
Backward
1. Loosen, do not remove, the bolts
securing the handlebar to the upper
control arm.
6
Adjustment 2
2. Rotate steering lever forward or
backward to desired position and tighten
bolts.
5
4
1. Handlebar
2. Upper Control Arm
3. Adjustment Holes
4. Eccentric Spacer
5. Mounting Hardware
6. Lower Control Arm
NOTE: Tighten upper bolt first.
Forward Speed Adjustment
(Figure 23)
NOTE: Reverse speed cannot be adjusted. If
unit tracks excessively left or right in reverse,
see your dealer for repair.
Figure 21
IMPORTANT: Adjust each steering lever
equally.
IMPORTANT: The unit should track within
2 feet (0.61 m) of a straight line for 30 feet
(9.14 m).
NOTE: When adjusting steering levers for the
first time it is recommended that you make
adjustments in the following order.
The travel of the steering levers may need
adjustment if the unit turns to the right or left
when both steering levers are pushed as far
1. Adjust Steering Lever Height
1. Remove mounting hardware that
attaches the handlebars to the upper
control arm. Move handlebar up or down
until the handlebar mounting holes are
aligned with the prefered adjustment
holes.
indicates that the drive wheel on that side is
to slow down or the wheel that is turning
slower needs to speed up to allow the unit to
travel in a straight line.
2. Install mounting hardware and tighten.
2. Adjust Steering Lever Width
1. Loosen hardware at the base of the
lower control arm item 5.
1. Determine which way the unit turns.
2. Loosen jam nut on the adjustment bolt.
3. Adjust speed by:
2. Rotate eccentric spacer to move the
levers away from or closer to the
operators position (figure 22).
•
Turning adjustment bolt clockwise to
decrease steering lever travel.
•
Turning adjustment bolt
counterclockwise to increase steering
lever travel.
3. Tighten hardware.
4. Tighten the jam nut.
EN - 28
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915146, 168
1
2
3
1
4
1
1. Forward Travel Adjustment Bolt
2. Lower Control Arm
2
Figure 23
1. Deck Spindle
2. Engine Drive Pulley
3. Deck Idler
REPLACING PTO BELT
4. PTO Belt
Remove
(Figure 24)
Figure 24
1. Lower mower deck to the ground.
2. Remove belt covers from mower deck.
915148, 150, 170, 178, 180
2
CAUTION: Use care when
releasing idler spring tension.
Keep body parts well away from
idler when performing this
operation.
4
1
1
3
3. Rotate idler arm clockwise until tension
is removed from PTO belt.
4. Remove PTO belt from left mower deck
pulley.
5. Slowly release idler arm until tension is
removed from idler spring.
6. Remove PTO belt from mower deck and
engine drive pulley.
1. Deck Spindle
2. Engine Drive Pulley
3. Deck Idler
4. PTO Belt
Figure 25
EN - 29
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Install
(Figure 24)
4
2
1
NOTE: Do not install PTO belt on left mower
deck pulley in step 1.
2
1. Install PTO belt on engine drive pulley
and mower deck.
2. Rotate idler arm clockwise until PTO belt
can be routed around left mower deck
pulley.
3. Slowly release idler arm until idler pulley
rests firmly against PTO belt.
4. Install belt covers on mower deck.
3
NOTE: Ensure that belt is still positioned in
the groove of the sheaves after belt covers
are installed.
REPLACING HYDROSTATIC BELT
Remove
1. Hydrostatic Belt
2. Hydrostatic Transmission Pulley
3. Idler
(Figure 26)
4. Idler Spring
1. Remove PTO belt. See “REPLACING
PTO BELT” on page 29.
Figure 26
CAUTION: Use care when
releasing idler spring tension.
Keep body parts well away from
idler when performing this
operation.
STORAGE
Short Term Storage
IMPORTANT: NEVER clean unit with high-
pressure water or store unit outdoors.
Remove all dirt, grease, leaves, etc. Store in
a clean dry area.
2. Disconnect idler spring.
3. Remove hydrostatic belt from
hydrostatic transmission pulleys, drive
pulley, and idler.
Ensure all fasteners are properly tightened.
Long Term Storage
Install
Follow all instructions under Short Term
Storage.
(Figure 26)
1. Install hydrostatic belt on idler, drive
pulley, and hydrostatic transmission
pulleys.
Remove and fully charge battery. Store in a
clean dry area.
Refer to Engine Manual for the proper engine
storage procedures.
2. Connect idler spring.
3. Install PTO belt. See “REPLACING PTO
BELT” on page 29.
Touch up all scratched or chipped paint
surfaces.
Fuel System
Gasoline left in the fuel system for extended
periods without a stabilizer will deteriorate,
resulting in gum deposits in the system.
These deposits can damage the carburetor
and the fuel hoses, filter and tank. Prevent
deposits from forming in the fuel system
during storage by adding a quality fuel
stabilizer to the fuel. Follow the
recommended mix ratio found on the fuel
stabilizer container.
EN - 30
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IMPORTANT: NEVER store the engine with
fuel in the fuel tank inside of a building with
potential sources of ignition.
Add Fuel Stabilizer
1. Drain fuel from fuel tank.
2. Allow the engine to run until it stops.
Turn engine OFF when it begins surging
to avoid engine damage.
3. Add fuel stabilizer to fuel, following the
manufacturer’s instructions.
4. Pour fuel into the tank.
5. Re-start engine.
6. Run the engine outdoors for 1 to 2
minutes to be sure that treated gasoline
has replaced the untreated gasoline in
the carburetor.
7. Slow the engine to an idle speed.
8. Repeat step 2.
EN - 31
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TROUBLESHOOTING
PROBLEM
PROBABLE
CAUSE
1. Safety interlock
system is not
engaged or is
faulty.
Interlock System” on page 14.
2. Fuel tank is
empty.
2. Fill fuel tank. See “FILLING FUEL TANK”
on page 17.
3. Discharged
battery.
3. Charge battery. See “Charging the Battery”
on page 27.
Engine will not
crank/start.
4. Poor connection
between battery
and battery
4. Tighten battery cables and/or clean battery
and battery cables. See “Cleaning Battery
and Battery Cables” on page 27.
cables.
5. Spark plug wire(s)
loose or spark
5. Connect spark plug wire(s) or replace spark
plug(s). Refer to Engine Manual for detailed
instructions.
plug(s) faulty.
6. Faulty electrical
system.
6. Contact your Gravely dealer.
7. Faulty engine.
7. Contact your Gravely dealer.
1. Disengage choke.
1. Choke engaged.
Engine runs
rough.
2. Air filter cartridge
plugged.
2. Clean or replace air filter cartridge. Refer to
Engine Manual for detailed instructions.
3. Faulty engine.
3. Contact your Gravely dealer.
1. The transmission
bypass lever is
engaged.
1. Disengage transmission bypass lever. See
“MOVING UNIT MANUALLY” on page 19.
Unit does not
move with
engine running
when using
2. Faulty hydrostatic
belt.
2. Replace hydrostatic belt. See “REPLACING
HYDROSTATIC BELT” on page 30.
steering levers.
3. Faulty
3. Contact your Gravely dealer.
transmission.
1. Operator
1. Depress operator presence switch by sitting
on seat.
presence switch
not depressed.
2. Faulty operator
presence switch.
2. Contact your Gravely dealer.
PTO or mower
blades do not
engage or shut
off.
3. Faulty PTO belt.
3. Replace PTO belt. See “REPLACING PTO
BELT” on page 29.
4. Faulty PTO
switch, wires,
connectors, or
clutch.
4. Contact your Gravely dealer.
1. Engine oil level
low.
1. Add engine oil. Refer to Engine Manual for
detailed instructions.
Engine
overheats.
2. Cooling system
plugged.
2. Clean cooling system. Refer to Engine
Manual for detailed instructions.
3. Faulty engine.
3. Contact your Gravely dealer.
EN - 32
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PROBLEM
PROBABLE
CAUSE
Unit moves with 1. The parking brake
1. Contact your Gravely dealer.
needs
engine off and
parking brake
engaged.
adjustment.
2. Faulty parking
brake.
2. Contact your Gravely dealer.
Unit does not
travel in a
1. Incorrect tire
pressure.
1. Check tire pressure. See
“SPECIFICATIONS” on page 34.
straight line.
2. Steering levers
need adjustment.
2. Adjust steering levers. See “Forward Speed
Adjustment” on page 28.
3. Hydrostatic
transmission
and/or linkage
needs
3. Contact your Gravely dealer.
adjustment.
Unit creeps with 1. Hydrostatic
transmission
and/or linkage
needs
steering levers
in neutral
position.
adjustment.
Poor cutting
quality.
1. Mower deck not
level or mower
1. Level and adjust pitch of mower deck. See
“LEVELING AND ADJUSTING PITCH OF
MOWER DECK” on page 23.
pitch is incorrect.
2. Dull or faulty
mower blades.
2. Sharpen mower blades (see SHARPENING
MOWER BLADE on page 24) or replace
mower blades (see REPLACING MOWER
BLADE on page 24).
SERVICE PARTS
Be sure to always use genuine Gravely
ACCESSORIES
See your authorized Gravely dealer to add
parts to keep your unit running like new.
these optional accessories to your unit.
Part No.
Description
Part No.
Description
51519500
34- and 50-Inch Spindle
Assembly
71503300 36-Inch Roller
71503400 48-Inch Dethatcher
71503600 Spreader
51520900
07100124
07200116
07200010
42-Inch Spindle Assembly
Front Wheel
71508200 48-Inch Aerator
71510800 34-Inch Mulch Kit
71510900 Trailer Hitch Kit (915146, 168)
34-Inch Deck Belt
HA Raw Laminated Belt –
Hydraulic Drive
71513000 Washout Port Kit
(915146, 168)
03971900
03797300
04265400
07200523
03971900
07200524
34-Inch Mower Blade
34-Inch Mulching Blade
42-Inch Mower Blade
42-Inch Deck Belt
81513400 34-Inch Non-Powered Bagger
81514200 42-Inch Non-Powered Bagger
81515000 50-Inch Non-Powered Bagger
71513100 42-Inch Mulch Kit
50-Inch Mower Blade
50-Inch Deck Belt
71513200 50-Inch Mulch Kit
EN - 33
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SPECIFICATIONS
Model Number
Model
915146
915148
915150
ZT 50
915168
ZT 34
ZT 42
ZT 34
CARB
Engine
Type
Briggs &
Stratton
Kawasaki
Briggs &
Stratton
3
30.51 (500)
30.51 (500)
44.3 (726)
Engine Displacement in. (cc)
Governed RPM (May be different
from maximum RPM)
3600 + 0
3600 – 100
Drive
Forward Max. – m.p.h (km/h)
Reverse Max. – m.p.h (km/h)
Turning Radius
6.0 (9.6)
3.0 (4.8)
Zero
Brakes
Internal Transmission
Hydrostatic Drive
Transmission
Electrical
Starter
Electric
Battery
12V Maintenance Free 190 CCA
Electric Clutch
PTO (Power Take-Off)
Fuel
Fuel Type
Refer to Engine Manual
1.97 (7.49)
Fuel Tank Capacity – gal. (L)
Size and Weight
Length – in. (cm)
Width – in. (cm)
65 (165.1)
45 (114.3)
438 (199)
54 (137.2) 62 (157.5) 45 (114.3)
Weight – lbs (kg)
Height – in. (cm)
495 (225)
506 (230)
42 (106.7)
439 (199)
40 (102)
40 (102)
Tires
Front Tire Size – in.
Rear Tire Size – in.
Front Tire Pressure – psi (kPa)
Rear Tire Pressure – psi (kPa)
Mower Deck
4 x 11
18 x 6.5 x 8 18 x 8.5 x 8 18 x 9.5 x 8 18 x 6.5 x 8
46 (317)
10 (68.95)
Cutting Height – in. (cm)
Cutting width – in. (cm)
Max. Towing Capacity – lbs (kg)
Max. Tongue Weight – lbs (kg)
1.5 – 4.5 (3.8 – 11.4)
34 (86)
42 (106.7)
300 (136)
30 (13.6)
50 (127)
34 (86)
EN - 34
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SPECIFICATIONS
915170
Model Number
Model
915178
ZT 42
915180
ZT 50
ZT 42 CARB
Engine
Type
Kawasaki
44.3 (726)
Kohler
3
44.2 (725)
Engine Displacement in. (cc)
Governed RPM (May be different from
maximum RPM)
3600 + 0
3600 – 100
Drive
Forward Max. – m.p.h (km/h)
Reverse Max. – m.p.h (km/h)
Turning Radius
6.0 (9.6)
3.0 (4.8)
Zero
Brakes
Internal Transmission
Hydrostatic Drive
Transmission
Electrical
Starter
Electric
Battery
12V Maintenance Free 190 CCA
Electric Clutch
PTO (Power Take-Off)
Fuel
Fuel Type
Refer to Engine Manual
1.97 (7.49)
Fuel Tank Capacity – gal. (L)
Size and Weight
Length – in. (cm)
Width – in. (cm)
65 (165.1)
54 (137.2)
496 (225) 489 (222)
62 (157.5)
Weight – lbs (kg)
Height – in. (cm)
501 (227)
42 (106.7)
40 (102)
Tires
Front Tire Size – in.
Rear Tire Size – in.
Front Tire Pressure – psi (kPa)
Rear Tire Pressure – psi (kPa)
Mower Deck
4 x 11
18 x 8.5 x 8
18 x 9.5 x 8
46 (317)
10 (68.95)
Cutting Height – in. (cm)
Cutting width – in. (cm)
Max. Towing Capacity – lbs (kg)
Max. Tongue Weight – lbs (kg)
1.5 – 4.5 (3.8 – 11.4)
42 (106.7)
50 (127)
300 (136)
30 (13.6)
EN - 35
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Consumer Mowing Equipment
Limited Warranty
Ariens Company (Ariens) warrants to the original purchaser that Ariens, Gravely and Countax brand
lawn and garden consumer products purchased on or after 1/1/2013 will be free from defects in material
and workmanship for the time period noted in the chart below. Equipment put to personal use around a
single household or residence is considered “Consumer Use”; equipment put to any business use
(agricultural, commercial, or industrial) or used at multiple locations is considered “Commercial Use.” If
any product is rented or leased, then the duration of these warranties shall be 90 days after the date of
purchase.
An authorized Ariens dealer (Ariens brand products), Gravely dealer (Gravely brand products), or
Countax dealer (Countax brand products) will repair any defect in material or workmanship, and repair or
replace any defective part, subject to the conditions, limitations and exclusions set forth herein. Such
repair or replacement will be free of charge (labor and parts) to the original purchaser except as noted
below.
Warranty
Code
Warranty Period
Consumer Use
Warranty Period
Commercial Use
Product Group
Zoom & ZT Zero-Turn Riders;
AMP™ Rider
HA
HB
HC
3 Years
3 Years
2 Years
90 Days
1 Year
Max Zoom & ZT HD Zero-Turn Riders
Tractors, "961" Series Walk-Behind
Mowers
90 Days
Classic LM Series Mowers; Wide Area
Walk Mowers; Razor, XD3
HD
3 Years
90 Days
N/A
Service (replacement) Parts
90 Days (no labor)
90 Days (no labor)
Special Extensions
The chart below details special extensions to this warranty:
Warranty
Code
Warranty
Period
Warranty Exception
Use
Detail
3 years parts and labor
Additional 2 years parts only
Mower Deck Shell on
Zero-Turn Riders
HA, HB
5 Years
Consumer
Consumer
Main Frame on
Zero-Turn Riders
3 years parts and labor
Additional 2 years parts only
HA, HB
HA
5 Years
2 Years
Batteries for AMP™ Rider
Consumer 100% first year; prorated second year
Exceptions and Limitations
The chart below details special exceptions to this warranty:
Warranty
Code
Warranty
Period
Warranty Exception
Batteries
Use
Detail
All
1 Year
Consumer Prorated
These components are not covered
when used commercially.
All
Belts, Muffler, Tires
None
Commercial
Cloth, Plastic, and
Rubber Components
(Including Belts and
Cables)
Warranty is limited to 2 years for
consumer use. Except as noted above,
these components are covered for
defect, not for wear.
Maximum
2 Years
All
All
All
Engines are covered by engine
manufacturer’s warranty. Refer to
engine manufacturer’s warranty
statement.
See Engine
Manufacturer’s
Warranty
Engines
All
Customer Responsibilities
Register the product immediately at the time of sale. If the dealer does not register the product, the
customer must complete the product registration card in the literature package and return it to the Ariens
To obtain warranty service, the original purchaser must:
• Perform the maintenance and adjustments explained in the owner's manual.
• Promptly notify Ariens or an authorized Ariens, Gravely or Countax service representative of the need
for warranty service.
EN - 36
Consumer 2013
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• Transport the product to and from the place of warranty service at owner's expense.
• Have the warranty service performed by an authorized Ariens, Gravely or Countax service
representative.
To Find an Authorized Service Representative:
In the U.S. and Canada:
Or contact us by mail or by phone:
•
In the U.S., Canada, Mexico, Caribbean, In Europe, Asia, Africa or
In Australia or New Zealand:
Central and South America:
the Middle East:
Ariens Company
Building 2
6 Wedgewood Rd.
Hallam, Victoria 3803 Australia
Phone: (03) 9796 4244
1800 335 489
Ariens Company
655 W. Ryan Street
Brillion, WI 54110
Phone: (920) 756 - 4688
Countax Ltd, Countax House
Great Haseley, Oxfordshire,
OX44 7PF
Phone: 0800 597 7777
Exclusions – Items Not Covered by This Warranty
•
Parts that are not genuine Ariens, Gravely or Countax service parts are not covered by this
warranty and may void the warranty.
•
Damages resulting from the installation or use of any part, accessory, or attachment which is not
approved by the Ariens Company for use with product(s) identified herein are not covered by this war-
ranty.
•
•
The following maintenance, service and replacement items are not covered by this warranty unless
they are noted in the Limitations section above: lubricants, spark plugs, oil, oil filters, air
filters, fuel filters, brake linings, brake arms, brake shoes, skid shoes, scraper blades, shear bolts,
mower blades, mower vanes, brushes, headlights, light bulbs, knives, cutters.
Any misuse, alteration, improper assembly, improper adjustment, neglect, or accident which requires
repair is not covered by this warranty.
•
•
Use of gasoline blends exceeding 10% ethanol voids any and all warranties.
Products are designed to the specifications in the area that the product was originally distributed. Dif-
ferent areas may have significantly different legal and design requirements. This warranty is limited to
the requirements in the area in which the unit was originally distributed. Ariens Company does not
warrant this product to the requirements of any other area. Warranty service is limited to service
within the area originally distributed.
In countries other than the United States and Canada, contact the Ariens Company dealer for
warranty policies that govern within your country. Rights may vary from country to country and within
any one country.
•
Disclaimer
Ariens Company may from time to time change the design of its products. Nothing contained in this
warranty shall be construed as obligating the Ariens Company to incorporate such design changes into
previously manufactured products, nor shall such changes be construed as an admission that previous
designs were defective.
LIMITATION OF REMEDY AND DAMAGES
Ariens Company's liability under this warranty, and under any implied warranty that may exist, is limited to
repair of any defect in workmanship, and repair or replacement of any defective part. Ariens Company
shall not be liable for incidental, special, or consequential damages (including lost profits). Some states
do not allow the exclusion of incidental or consequential damages, so the above limitation or exclusion
may not apply to you.
AUSTRALIAN CONSUMER LAW
The following applies solely to warranties subject to Subsection 102(1) of the Australian Consumer Law:
Our goods come with guarantees that cannot be excluded by the Australian Consumer Law. You are
entitled to a replacement or refund for a major failure and for compensation for any other reasonably
foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail
to be of acceptable quality and failure does not amount to a major failure.
DISCLAIMER OF FURTHER WARRANTY
Ariens Company makes no warranty, express or implied, other than what is expressly made in
this warranty. If the law of your state provides that an implied warranty of merchantability, or an
implied warranty of fitness for particular purpose, or any other implied warranty, applies to Ariens
Company, then any such implied warranty is limited to the duration of this warranty. Some states
do not allow limitations on how long an implied warranty lasts, so the above limitation may not
apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from region to
region.
EN - 37
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Consumer 2013
Gravely
655 West Ryan Street
Brillion, WI 54110
920-756-4688
Fax 920-756-2407
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