Commercial Mower Owner’s Manual
For Sentar Serial #26980 and higher until superseded
WARNING: READ THIS MANUAL BEFORE USING
For your safety and for proper operation and maintenance read
carefully and keep readily available for future reference.
Additional replacement owner’s manuals as well as illustrated parts lists are available from
the most up to date product literature. Please note the model number and serial number
of your Wright product.
For reference please note the following information at the time of purchase:
SERIAL # _________________________
MODEL # _________________________
DATE OF PURCHASE ______________________
WRIGHT MANUFACTURING, INC. - 4600X WEDGEWOOD BLVD - FREDERICK, MD 21703
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TABLE OF CONTENTS
User Clothing:.......................................................................................................................4
How to start the mower:.......................................................................................................8
How to drive the mower:......................................................................................................8
How to Stop and Park the Mower........................................................................................8
How to Use the Mower on Varying Terrain.........................................................................9
How to Change the Speed/Sensitivity Adjustment..........................................................10
How to Perform the Tracking Adjustment........................................................................10
How to Test/Use the Blade Clutch/Brake Switch .............................................................10
Deck Adjustments............................................................................................................................. 11
Maintenance Record......................................................................................... 14
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Pre-Delivery Service of Mower by Dealer
If you are not completely familiar with the Safety Instruction
Manual read it now before proceeding with the Pre-Delivery
Service of the mower. Only your authorized Wright dealer
WARNING
should perform the Pre-Delivery Service of the mower.
The Wright Sentar is shipped completely assembled and has been adjusted and tested at the factory. However,
due to jostling during the shipping process and the delivery time lapse the following items need to be repeated
again before starting the mower. After you have uncrated the mower, follow these procedures in the order
indicated:
• Remove spark plug wire from spark plug(s).
• Inspect the mower for any damage, unusual conditions or missing parts.
• Inspect the mower for all of its decals, especially the warning decals. There should be one blade warning decal
on each side of the deck, the “shield missing” under the blade belt covers, and the dash decal.
• Check (and fill if necessary) engine oil level according to the engine manufacturer’s recommendation.
• Check (and fill if necessary) hydraulic fluid level. The level should be about 3” - 4” below the top of the oil fill.
Use synthetic oil: Mobil1 15W-50.
• Check rear tire pressure. 18 to 24 psi. is recommended. It should be even on both sides. Use the higher
pressures for heavier operators. Set the tire pressure in the front caster tires between 30 and 40 psi.
Higher pressures will help keep the caster tires on their rims when impacted from the side but give a stiffer
ride. Some Front Casters are equipped with non-pneumatic tires and do not required any air.
• Check the battery to see that the cables are tight and connected properly. The battery is 12 volts and is a
maintenance-free battery. Only charge the battery if it will not start the mower properly.
• Remove the blade belt covers and inspect the belt and idler arm for smooth operation. Also grease the spindles
and the idler arm.
• Rotate the blade pulleys slightly to see if they rotate freely and all turn together. There will be resistance due to
the clutch brake.
• Replace the blade belt covers.
• Check the cutter deck for proper adjustment. The deck should be approximately ¼” lower in the front than in
the rear and the deck should be level side-to-side. If the deck is not adjusted properly, please adjust at this
time. See Deck adjustments section of this manual for further instructions.
• Lubricate all moving parts (see Maintenance Items section of this manual).
• Fill fuel tanks with regular unleaded gasoline. Turn fuel valve under right side of dash towards the gas tank you
plan to use.
• DO NOT START THE ENGINE AT THIS TIME. FOLLOW THE NEXT PROCEDURE BEFORE STARTING.
The hydraulic system MUST be checked for proper operation before allowing wheels to operate on the
ground.
• Set the rear of the machine on jack stands or blocks to raise rear wheels off the ground two or three inches and
check to be sure that the mower will not fall off the supports you devise. (Do not support the mower’s
weight on any part of the foot platform.) You must be able to stand on the mower. The stand(s) must be
able to secure the mower from rolling off or away during the next procedures. Check under the mower deck
for any debris or unusual conditions.
• With hand controls in the middle or neutral position, apply the parking brake.
• Open the manual bypass valves on top of each pump a half-of-a-turn counterclockwise.
• Reattach spark plug wires to spark plugs.
• Before starting the engine be ready to stop it if the wheels begin to turn with the brake on. (If this happens,
check that the manual bypass valves on top of each pump are open at least a half-of-a-turn
counterclockwise.)
• Start the engine according to the engine manufacturer’s recommendation. Let the engine run at low RPM for
several minutes to get the hydraulic fluid circulating through the pumps. While seated or standing on the
foot platform, release the parking brake. Now gradually close the manual bypass valves on top of each
pump one at a time and see if the wheels start to move. If the wheels move when the hand controls are in
neutral position, adjust the pump neutral adjustment allen screw. The manual bypass valves on top of each
pump should now be firmly closed. (Do not tighten these bypass valves with a wrench. Only hand tighten.)
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Now try moving the hand control levers, one at a time, forward and backward. Check to see if the wheels
move forward and backward according to position of the levers. If not, service the hand control system. If
the wheels stop when the hand controls are in the neutral position, the parking brake should now be
applied.
• Before testing the blade clutch/brake operation, make sure the area is clear and there is nothing vulnerable to
possible thrown objects from under the mower. No one should be near the mower deck or in its line of
discharge at this time or at any time. The discharge chute deflector should be in the down position. The
parking brake should now be applied. Move the engine throttle to ¾ speed setting.
• Place your feet firmly on the foot platform and turn on the blade clutch switch. Run blades for a minute or so.
Try engaging and disengaging the blades a few times about 10 seconds apart. If the blades do not start
and stop in a short amount of time, service the blade brake system. With the blades on, now try lifting your
feet off the foot platform to test the Operator Presence Control switch (OPC). The engine should die and
the blades should stop in several seconds. If not, service the OPC system. Try this a couple of times.
• Disengage the blades, set the parking brake, shut off the engine and remove the mower from the stand(s).
• Drive the mower around on a level parking lot. It is recommended that the slower setting of the
Speed/Sensitivity Adjustment be used. (See further in this manual for information on Speed/Sensitivity
Adjustment.) Be sure that the mower drives in a straight line when both hand controls are held to the full
speed position which is up against the stationary control bar. If not, see further in this manual for
information on tracking adjustment.
• As you drive the mower, listen for any unusual noises and test for irregular operation and adjust or service as
necessary. Next, go over the safety information and operating procedures in this manual with the customer.
Instruct the customer in proper operation and observe the customer during their initial operation on a level
parking lot. Make sure the customer is familiar and comfortable with the basic operation and use of the
mower.
• Dealer: Please fill out and follow the instruction on the Product Registration Form and have the customer fill out
his part of the form. After the Product Registration Card is filled out and signed by the customer and a
representative from your dealership, please send or fax it within 14 days to your Wright Commercial
Products Distributor according to the directions on the Card. Then give the customer his copy of the
registration form and then keep your copy and mail the remaining copies of the form to your Wright
Commercial Products Distributor. The limited warranty is not valid unless the mower is registered and all of
the above steps are taken. Remember, the purchaser is both your and our customer and his satisfaction is
very important. Thank you for supporting our products.
The mower is now ready for delivery to your customer.
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WARNING
This symbol with the word “WARNING” indicates a
potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
This symbol with the word “CAUTION”
indicates a potentially hazardous situation
which, if not avoided, could result in minor or
moderate injury.
SAFETY INSTRUCTION MANUAL
TO WRIGHT MOWER USERS & OWNERS: READ THIS MANUAL BEFORE USING.
PLEASE BE CAREFUL!
INTRODUCTION
This mower is built to the highest standards in the
industry. However, carelessness or operator error
WARNING
may result in serious bodily injury or death. Accident
Owner/User Notice:
and hazard prevention are dependent upon the
The owner’s/user’s obligation is to instruct themselves
awareness, concern, wisdom, and proper training of
and all potential users in the safe operation of this
the personnel involved in the operation, transport,
equipment and be sure they read and follow the
maintenance, and storage of the equipment. Make
instructions in this safety manual and other material
sure every operator is properly trained and thoroughly
provided by Wright Manufacturing, Inc. before using or
familiar with all of the information in this manual
allowing others to operate the equipment. Do not
before operating the equipment.
operate this unit unless you carefully read, understand
and follow the assembly, installation, and safety
instructions contained in this manual and the warning
GENERAL SAFETY INSTRUCTIONS
The Wright Sentar is designed with your safety in
decals provided on the unit. Do not allow other
mind. It has the following safety systems with which
persons to use this unit unless you make sure they
carefully read, understand and follow these
instructions. Never allow children to operate or play
on the unit.
you should be familiar:
•
•
•
•
The warning decals on the mower including the
instrument panel warning
The blade switch must be “off” before starting the
engine
Your feet must be on the foot platform in order to
engage the blades
If you remove your feet from the foot platform
while the blades are running the engine will stop
and the blades will brake in seconds
Letting go of the hand controls will stop the
wheels instantly
WARNING
User Experience and Qualifications:
This product is designed for use by physically fit,
experienced, professional commercial mower
operators who have a minimum of 160 hours of
experience operating twelve horsepower and greater
industrial mowers. Operators must be 18 years or
older and weigh at least 120 pounds and no more
than 350 pounds They must have read and
understood this manual. DO NOT allow children to
operate the mower. Do not allow adults to operate the
mower without proper instruction mentioned above.
Never allow passengers on the mower.
•
•
Spring loaded chute deflector helps reduce
trajectory of thrown objects
•
•
Belt/pulley covers on cutter deck
Anti-tip rollers are provided at the rear of the
mower to minimize the possibility of tipping back
and over on the operator
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equipment is in safe working condition. Check the
blade mounting bolts for proper tightness every eight
(8) hours of operation. Check the blades for
excessive wear and sharpness every four to eight (4-
8) hours of operation. Replace excessively worn
blades. Sharpen dull blades. The mower should not
be used after the blades or other part of the mower
strikes a foreign object, until conducting a thorough
inspection and any damage is repaired. See the
instructions in the Recommended Maintenance
section of this manual for other items of required
maintenance.
WARNING
User Clothing:
DO NOT operate the mower while wearing sandals,
tennis shoes, sneakers, or shorts. Always wear long
non-baggy pants. Wear high-top leather work boots
with thick, textured tread, soft-rubber soled at all
times. Hard or smooth soled shoes are too slippery
for a good footing on mower platform. NEVER wear
loose-fitting clothing or jacket pockets that can get
caught to the handlebars or control levers of any
mower you drive. Wearing safety glasses, ear
protection and safety shoes is advisable and required
by some local ordinances and insurance regulations.
WARNING
Work Area Conditions and Inspection:
Prior to operating the unit, carefully inspect all
lawn/ground areas where you plan to use the mower
for hidden, hard-to-see objects or uneven ground that
may be hidden in the grass. Clear the work area of
moveable objects such as wires, rocks, glass, etc. that
might be picked up by the mower and dangerously
thrown. Remove, if possible, or mark the location of
all immovable objects or irregular areas and be sure
not to hit them with any part of the mower, its deck or
the blades. Obstacles such as holes, abrupt changes
in ground contour, tree trunks, stumps or roots, pipes
protruding from the ground, paving edges, etc. in the
path of operation can abruptly turn or stop the mower.
This could throw you off the mower or into and
possibly over the handle bars causing serious injury or
death. The faster you are moving the more potential
there is for injury. Mow only in daylight or in good
artificial light. Keep away from drop-offs, the edges of
ponds, streams, pools, etc. especially at the bottom of
slopes. Do not mow when children or others are
around. When the Wright mower is in use, never
direct the grass discharge toward bystanders, traffic,
cars or buildings nor allow anyone near the machine
while in operation. Thrown objects can pass through
glass windows and some walls of buildings. There is
extreme risk of danger from thrown objects or being
cut by the blades of the mower or being run over if
you lose control. Never operate the mower in an
enclosed area without good, approved ventilation.
Exhaust fumes are dangerous.
WARNING
Inspection of Mower Before Each Use:
DO NOT use the mower if any parts are not
maintained in good operating condition. Examine the
moving parts prior to each use. Look for excessive
wear, bald or worn tires, cracks in parts, loose or
missing bolts, cotter, linchpin or “hair” pins or cable
yoke pins and replace before operating the mower.
Make sure all safety equipment provided with the
mower is in good operating order, including all the
warning decals and the required operator-presence
device which stops the engine and blades when the
foot-operated Operator Presence Control (OPC)
switch is released. (To test the OPC, follow
instructions in the Operating Instructions section of
this manual.) Inspect the two anti-tip rollers and their
respective bolts at the rear of the mower for tightness
and proper operation. Be sure that all parts of the
hand-operated transmission control system are tight
and secure. This is to reduce the possibility that the
mower could have a loss of control or safety.
WARNING
Scheduled Mower Maintenance Safety:
Replace worn tire(s) with less than 3/32” of any tread
groove left. Use tires with the tread pattern specified
by Wright Mfg., Inc. only. DO NOT change the engine
governor settings or over-rev the engine contrary to
engine manufacturer specifications. Keep the Wright
mower in good operating condition, and keep safety
devices and shields in place and in working condition.
Keep all nuts, bolts, and screws tight to be sure the
WARNING
Initial Operating Safety Guidelines:
• Read and understand the warnings on the
instrument panel of the mower.
• Keep a firm hold on the stationary handle at all
times.
• Keep both feet on the foot platform at all times.
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• Know the controls and how to stop quickly.
• Before attempting to start the engine, follow all
starting instructions below and in the engine
operator’s manual.
• Be alert for traffic when crossing roads or operating
near roadways.
• Before climbing curbs, crossing gravel drives,
sidewalks or roads, turn off the blades, lift them
into transport position, and wait for them to stop.
• Look behind before backing up.
• Before leaving the operator’s position, even
momentarily, turn off the blade clutch
engagement switch and apply the parking
brake. Keep others from coming near the
mower. Get back on the mower as soon as
possible.
WARNING
Replacement Parts:
Use of parts other than specified parts supplied by
Wright Manufacturing, Inc. may compromise the safe
use of the mower, are not recommended and their use
could void the warranty.
• When leaving the Wright mower unattended, turn off
the blade clutch engagement switch, apply the
parking brake, stop the engine and remove the
key. Never leave the machine unattended on a
slope in case someone disengages the parking
brake which would be hazardous if the mower
were to roll.
• When transporting, driving onto transport vehicles,
into buildings, across parking lots or otherwise
not mowing grass, turn off the blade clutch
engagement switch to reduce risk of thrown
objects and rotating blade hazard. After coming
to a stop apply the parking brake, stop the
engine and remove the key.
• Before performing any maintenance or repair
service, disengage power to blades, apply the
parking brake, stop the engine, remove ignition
key and spark plug wire from spark plug(s).
• All operators of this mower should exercise caution
when driving this mower at high speeds.
Sudden stops from excessive speeds may
cause serious injury.
• DO NOT allow inexperienced people to operate the
mower until they have read and understood
these safety instructions. Operate the mower at
slower speeds while becoming familiar with it.
• The grass discharge chute deflector must be
installed at all times and in the down position
except that it may be raised when the grass
catcher is completely installed or a mulch kit is
completely installed.
WARNING
Operation on Slopes:
DO NOT operate on steep slopes. Do not operate the
mower on slopes steeper than you can feel secure
about the traction of the tires and the stability of the
mower. Do not operate the mower on slopes at all
when the grass is wet. There is a danger of suddenly
sliding sideways or down the hill. When operating on
a slope, travel across the grade whenever possible,
not in an up or down pattern. Reduce speed and
exercise extreme caution on slopes and in sharp turns
to prevent tipping or loss of control. Be especially
cautious when changing direction on slopes. Heavier
operators may consider obtaining the optional weight
bar which is designed to add weight to the front of the
machine.
When pointing up a slope, the Sentar has the most
weight on the drive wheels and therefore the most
traction at the tires. However, this is the angle that it
has the most tendency to tip back (“pop a wheelie.”)
This is the preferred angle for mowing small areas of
steeper slopes.
• If the mower discharge clogs, turn off the blade
clutch switch, apply the parking brake, stop the
engine and remove the key before removing
obstruction.
• Keep all shields and covers in place, especially
grass discharge chute deflector and the blade
belt covers.
• Keep hands, feet and clothing away from rotating
parts, especially the rear wheels, blades, engine
flywheel, belts and pulleys.
• Do not touch engine or muffler while engine is
running or soon after it is stopped. These areas
can be so hot as to cause severe burns.
• Clean grass, leaves and lubricant spills from
surfaces after use to prevent fire hazard.
Recommendations for this angle:
• Lean as far forward as possible and stand if
necessary to add your weight to the front of the
mower.
• Accelerate gently. Do not accelerate quickly to
avoid “popping a wheelie”.
• If backing down the hill, do not stop suddenly but
slow down gradually.
When pointing down a slope, the Sentar has the
least weight on the rear drive wheels and therefore
the least traction at the tires. This is the angle that the
mower has the most tendency to slide. However, this
is the angle that it has the least tendency to tip back.
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Avoid this angle, as it has the least advantage for the
Sentar.
WARNING
Recommendations for this angle:
Operation During Zero-Radius Turns:
During zero-radius turns (when one mower wheel
rotates backwards while the other rotates forward)
drive extra slowly to reduce the possibility of losing
traction, or control, or becoming dizzy. This will help
prevent you from being thrown off the mower. Be
aware that if you do a turn on a slope you may go
through all of the orientations to a slope mentioned
above and must handle the mower accordingly.
• Stretch your arms out straight while holding onto the
stationary handlebar and sit back as far as you
can on the seat. This adds more of your body
weight to the drive wheels for more traction.
• Do not change speed suddenly to minimize the
tendency of going into a slide. Accelerate and
decelerate gently. If you ever go into an
uncontrolled slide while pointing down a slope
the recommended procedure is to let go of the
handles and jump off if necessary. Otherwise,
control the mower gently and stay off slopes
that tend to make the wheels slide.
Operation in Reverse:
When crossing a slope sideways, the Sentar has
the average amount of weight on the drive wheels
versus the front wheels, similar to level ground.
However, this angle leaves the least weight on the
higher side drive wheel, tending to make it slip. This
is the preferred angle for mowing large areas of gentle
slopes.
Always keep a firm grip on the mower stationary
handlebar with both hands. Keep both feet firmly on
the foot platform. Look behind you before backing to
prevent injuring yourself or anyone behind you.
Operate the mower very slowly, inching it backward
until you become familiar with how the mower
operates. Always operate slowly if in an awkward
location or position. While backing up never place
your foot or feet on the ground near the back edge of
the mower to prevent serious personal injury if the
mower were to run over you.
Recommendations for this angle:
• Sit back, as far as you can on the seat. This adds
weight to the rear drive wheels and will allow
you to mow more quickly across the slope
without sliding. If your Sentar is equipped with
the optional weight bar on the front, the mower
may not handle as well crossing slopes as a
Sentar without the weight bar on the front.
Weight on the front of the mower reduces the
traction of the rear drive wheels and can cause
the mower to slide or nose dive down hill. Use
of the optional weight bar is determined by the
width of cut of the mower and the operator’s
weight. For 48” and 52” cut mowers, operators
over 220 pounds may prefer the optional weight
kit. For 61” cut mowers, operators over 280
may prefer the optional weight kit. Remember it
is recommended that operators weigh at least
120 pounds and not more than 350 pounds.
• To reduce the chances of “popping-a-wheelie”, do
not accelerate quickly.
WARNING
Operation in Forward Direction:
Always keep a firm grip on the mower stationary
handlebar with both hands. Operate the mower
slowly until you become familiar with how the mower
operates. Do not operate the mower faster than
conditions allow. For example, hills, wet or bumpy
ground, dim light or high grass are all conditions
requiring slower speeds. Never operate the mower at
the highest speed unless you are on level, wide, open
areas of clearly visible ground or transporting on
paved areas. Speeding with any mower is dangerous,
and so is traveling faster than conditions should
permit on this mower. Sudden stops from excessive
speed or falling off the mower may cause serious
injury or death.
Note: Excessively worn tire tread is dangerous.
Replace tire(s) with less than 3/32” of any tread
groove left. Use tires with the tread pattern
recommended by Wright Mfg., Inc. only. Keep the tire
pressure in the drive tires between 18 and 24 psi.
Higher pressures will cause the tires to have less
traction which may prevent safe operation.
WARNING
Fuel Safety:
Handle gasoline with care – it is highly flammable. Do
not smoke while handling gasoline. Use an approved
gasoline container. Never remove the fuel cap or add
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gasoline to a running or hot engine or an engine that
has not been allowed to cool for several minutes after
running. Never fill the tank indoors and always clean
up spilled gas. NEVER store the equipment with
gasoline in the tank inside a building where fumes
may reach an open flame or spark. Allow the engine
to cool before storing in any enclosure.
WARNING
Hydraulic Safety:
Keep body and hands away from pin holes or fittings
that eject hydraulic fluid under high pressure. Use
paper or cardboard and not hands to search for leaks.
Hydraulic fluid escaping under high pressure may
have sufficient force to penetrate skin and cause
serious injury. If foreign fluid is injected into the skin,
it must be surgically removed within a few hours by a
doctor familiar with this form of injury or gangrene may
result. Seek medical attention immediately. Make
sure all hydraulic fluid connections are tight and all
hydraulic hoses and lines are in good condition before
starting the Wright mower. Hydraulic fluid is under
high pressure. If you need service on your hydraulic
system, please see your authorized Wright dealer.
Wright is fully concerned with your safety. Please
read the above again and again until you fully
understand the methods to promote the safest
operation possible.
REMEMBER – YOUR MOWER CAN BE ONLY AS
SAFE AS THE OPERATOR.
FAILURE TO FOLLOW SAFE OPERATING
PRACTICES MAY RESULT IN
SERIOUS INJURY OR DEATH.
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OPERATING INSTRUCTIONS
If you are not completely familiar with the Safety Instruction
Manual read it now before proceeding with the operation of the
mower. REMEMBER THERE ARE CERTAIN PRECAUTIONS
LISTED IN THIS MANUAL THAT YOU MUST NOW TAKE BEFORE
STARTING THE MOWER.
WARNING
throttle, pull out on the choke control knob and
turn the key to the start position. Do not engage
Inspect Mower Before Each Use:
the starter for more than ten (10) seconds at a
time. This may overheat the starter and the
wiring systems. Wait ten (10) seconds between
attempts. If the engine does not start within ten
tries or stalls frequently, take the mower in for
service.
Inspection of Mower: Do not use the mower
if any parts are not maintained in good operating
condition. Examine all moving parts prior to each
use. Look for excessive wear, bald drive tires or
worn out front tires (normally smooth), cracks in
parts, loose or missing bolts, cotter, linchpin or “hair”
pins or cable yoke pins and replace before operating
the mower. Make sure all safety equipment provided
with the mower is in good operating order, including
all warning decals and the operator-presence device
which stops the engine and blades when the foot-
operated Operator Presence Control (OPC) switch is
released. To test the OPC, follow the instructions
given later in this manual. Inspect the two anti-tip
rollers and their respective bolts at the rear of the
mower for tightness and proper operation. Ensure
that all parts of the Quad Lever™ control system are
tight and secure. This is to reduce the possibility that
the mower could have a loss of control or safety.
After starting the engine according to the engine
manufacturer’s recommendation, push in on the
choke control knob to open the choke valve, let the
engine run for several minutes to get the hydraulic
fluid circulating through the pumps, etc. and to allow
the engine to warm up. Do not over-rev a cold
engine.
Unusual noises or irregular operation:
As you drive the mower, listen for any unusual noises
and test for irregular operation and adjust or service
as necessary.
How to drive the mower:
While sitting or standing, both feet should be firmly
placed on the foot platform. Set the engine speed
about a fourth of the way from idle. Release the
parking brake. Now try moving the hand control
levers, one at a time, very slightly, forward and
backward. Check to see if the wheels move forward
and backward according to the position of the levers.
(If not, check to see that the pump release valves are
closed.) With both feet still firmly placed on the foot
platform, increase the engine speed to about half of
the way from idle speed. Release the parking brake.
The higher engine speed will make the controls much
more responsive and the mower much quicker; Use
caution if it is your first time. Now try moving the
hand control levers, one at a time, very slightly,
forward and backward. Gradually increase your
speed until you are well acquainted with the
operation of the hand controls and the mower’s
behavior. After gaining a good feel for how the
mower handles, gradually attempt higher engine
speeds until familiar with operation at full throttle
engine speed.
Basic Operation: The following procedures
are to guide you through the basic operation of the
mower. You should be a qualified mower operator
according to the safety section of this manual. If this
is your first time, operation should only be done with
the assistance of your dealer on a level area. You
should go through each step, in the order indicated,
every time you start the mower.
How to start the mower:
Before starting the engine
• Make sure the control levers are in the exact
neutral position
• Apply the parking brake if it is not already set.
• Turn OFF the blade engaging switch if it is on.
• Turn fuel valve toward tank with fuel in it.
Starting the engine
Electric Start:
•Start the engine according to the engine
manufacturer’s recommendation, see engine
manual. Set the throttle control lever near mid
How to Stop and Park the Mower
Come to a complete stop. If the blades are on, turn
them off using the switch on the instrument panel.
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Make sure the control levers are in the exact neutral
position. Set the parking brake, reduce the engine
speed to idle, shut off the ignition switch to stop the
engine and then remove the key from the ignition
switch. The mower is now parked. Do not leave
mower unattended on a sloped surface.
• Initial Operating Safety Guidelines
• Operation On Slopes
• Operation In Reverse
• Operation In Forward Direction
• Operation During Zero-Radius Turns
How to Adjust Neutral
How to Drive the Mower Over a Curb
To climb a curb, first see the Safety Instruction
Manual section of this manual, especially the parts
on:
Neutral refers to the mower movement when the
engine is set to full throttle, parking brake is off, and
the control levers are in the neutral position. The
mower should not move forward or backward during
this time. If the mower is moving forward or
rearward, the neutral setting must be adjusted. The
hydraulic pump has a Return-to-Neutral (RTN) device
built into the linkage of the pump. To make the
adjustment, loosen the ¼” allen bolt and rotate the
RTN device until the neutral position is found and
then retighten the ¼” allen bolt. Use care not to over
tighten the allen bolt.
• Initial Operating Safety Guidelines
• Operation In Reverse
• Operation In Forward Direction
Next, raise the mower deck into the locked transport
position. This is the highest position for the mower
deck. Then drive the mower in reverse at a 45
degree angle to the curb (with the left side of the
mower closest to the curb) until you are within an
inch or two of the left-rear tire hitting the curb. Stop
and then gradually bump into the curb with that tire
until it is just on top of the curb. If the tire slips even
while lurching the mower into the curb, then the curb
is too high and you should use ramps or find another
way. The mower should still be at a 45 degree angle
to the curb. Now, while maintaining the same angle
to the curb, continue to back up until the right-rear tire
is close to the curb. Using the same technique lurch
the right tire onto the curb. After both wheels are on
top of the curb, turn the mower counterclockwise and
back up so the left caster wheel comes over and last
should be he right caster wheel as the mower is
twisting to the left (counterclockwise). The technique
works the best if you try not to drive backwards at a
near 90 degree angle to the curb but get all of the
wheels to go over while the mower is moving at least
a 45 degree angle to the curb. To drive off a curb,
first try driving up onto it to make sure the curb is not
too high. If the curb is not too high, drive the right-
front caster off first while driving toward the curb at a
45 degree angle (the curb should be to your right).
Then, maintain that 45 degree angle so the left caster
goes over, then the right-rear wheel, then the left rear
wheel.
WARNING
Never drive straight onto or off a curb.
Never drive straight onto or off a curb. If you do the
whole procedure at a very sharp angle it will tend to
minimize the contact of the mower deck with the curb
and you will be able to more safely control the
mower.
How to Use the Mower on Varying Terrain
See the Safety Instruction Manual section of this
manual, especially the parts on:
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should be set to the fast position. See previous
section. Before changing the length of the control
rods several facts are important to know.
How to Change the Speed/Sensitivity
Adjustment
The controls are initially set with the Speed/
Sensitivity Adjustment
In the faster Speed/Sensitivity setting neither cable
should be shortened so much that at full speed it
pulls the pump control lever (on the sides of the
pumps) against the pump’s internal stop. The pumps
have an internal stop that is not designed to take this
type of force and could eventually cause pump
leakage or other damage to the pump. Therefore, to
reach the maximum capable speed, the rods should
be lengthened one turn at a time until you can feel in
the hand control that the internal stop has been
contacted with the control handles in the maximum
forward position. Then shorten the cable one turn.
This will enable the stationary bar to stop the control
handle and protect the internal pump stop from
damage. Remember, this procedure does not apply
if the Speed/Sensitivity Adjustment is in the slower
setting.
in the faster, more
sensitive position. If
an operator is not
completely familiar
with mower operation
the operator may
desire to decrease
the ground speed approximately 25-30%. The slower
setting has a corresponding decrease in the
sensitivity of the controls. In other words, a given
amount of movement of the control levers will cause
about a 25-30% decrease in the ground speed
making the controls less sensitive. After stopping
the engine, the adjustment is made by removing rod
ends connected to the control rods from the current
holes in the control levers and reinstalling them into
the alternate holes. The top holes closest to the
control handles are for the faster, more sensitive
setting and the bottom holes farthest from the control
handles are the slower, less sensitive setting. You
must then perform the Tracking Adjustment
described below.
So, if the mower is tracking to the left, either the left
side needs to go faster (by lengthening the upper
control rod on the left) or the right side needs to go
slower (by shortening the upper control rod on the
right). If the mower is tracking to the right, either the
right side needs to go faster (by lengthening the
upper control rod on the right) or the left side needs
to go slower (by shortening the upper control rod on
the left).
How to Perform the Tracking Adjustment
First ensure that the tire pressure is equal on both
rear drive tires and equal on both front tires. Drive
the mower on a level parking lot with engine at full
throttle. Check that the mower drives in a straight
line when both hand controls are held to the full
speed position which is up against the stationary
control bar. If not, park the mower and stop the
engine. Before proceeding to adjusting the mower
tracking, check and make sure both controls move
freely through the forward and reverse range. Make
sure that debris has not hindered the movement of
the upper and lower control rods and linkages. If all
control linkages move freely and mower tracking is
off, proceed to the next step.
The only reference point to limit the adjustment from
becoming extremely off is the relative position of the
pump internal stop and the stationary bar in the faster
Speed/Sensitivity setting. Therefore, if everything is
extremely off either because you are installing new
parts or other reasons you should only use the faster
Speed/ Sensitivity setting to get the tracking to be
accurate. After getting the mower to track straight,
readjust the neutral adjustment , if necessary. It is
normal to need to make these adjustments from time
to time as the linkage breaks in or wears.
It is essential to start with the lower (and shorter)
control rods located near the pumps. With the control
levers in the neutral position, the right and left lower
control rod should be adjusted to allow their
respective torsion bar to remain level at the end
connected to the lower control rod. Specifically, with
the pump in the Return-To-Neutral position, the lower
rod end should be at the same height as the rigidly
fixed ball joint connected on the same end of the
torsion rod. Perform this adjustment on both the right
and left side. Now that the lower end of both torsion
rods are level, proceed to the upper control rods
connected to the control levers.
How to Test/Use the Blade Clutch/Brake
Switch
Before testing the blade clutch/brake operation, make
sure the area is clear and there is nothing vulnerable
to thrown objects from under the mower. No one
should be near the mower deck or in its line of
discharge. The discharge chute deflector should be
in the down position. The parking brake should now
be applied. Move the engine throttle to ¾ speed
setting. (When mowing, the engine speed should
always be at its highest setting. The engine governor
will regulate the engine according to the different
mowing conditions at that setting.) Place both feet
firmly on the foot platform and turn on the blade
clutch switch. Run blades for a minute or so. Try
engaging and disengaging the blades a few times
Loosen the jam nuts on both ends of the upper
control rod. Note: the Speed Sensitivity setting
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about 10 seconds apart. If the blades do not start
and stop in a few seconds each time, service the
blade brake system or contact your local Wright
dealer. Under mowing load, the clutch’s life will be
the greatest at the highest RPM setting.
located at each corner of the deck. These hangers
are connected to the chains that hold the deck.
Simply rotate the hanger at the corner of the deck
that needs adjustment. These hangers are right-
handed threads. If you raise the rear hangers above
the factory setting, the deck may not raise all the way
up into transport position. Be sure and check the
deck height of cut range after any adjustments are
made to these hangers to ensure that the height of
cut adjustments work properly. If unable to make the
adjustments needed by only using these hangers,
contact your dealer for assistance.
How to Test the Operator Presence Control
(OPC) Switch
With the parking brakes applied and the blades ON,
try lifting your feet off the foot platform to test the
Operator Presence Control switch (OPC). The
engine should kill and the blades should stop within a
few seconds. If not, service the OPC system or
contact your local Wright dealer.
Belt Tension Adjustment
The pump drive belt is self-adjusting, and requires no
adjustment, just replacement. The blade drive belts
are self-adjusting also and require no adjustment, just
replacement.
WARNING
Service and Adjustments
Tire Maintenance and Pressure
Excessively worn tire tread is dangerous on all hills.
Replace drive tires with less than 3/32” of any tread
groove left. Use tires with the tread pattern
How to Move the Mower if the Engine
Won’t Start
Rotate both of the manual “release” valve levers on
the rear of each hydraulic pump about ½ turn
counterclockwise. It is important not to over tighten
these levers. Damage may occur to the pump if this
valve is over tightened.
recommended by Wright Mfg., Inc. only. Keep the
tire pressure in the drive tires between 18 and 24 psi.
Higher pressures will cause the tires to have less
traction which will force you to go slower and with
less safety and give you a harder ride. Keep the tire
pressure in the front caster tires between 30 and 40
psi. Higher pressures will help keep the caster tires
on their rims when impacted from the side but give a
harder ride. Some Front Casters are equipped with
non-pneumatic tires and do not required any air.
They do not have any tread but should be replaced
when excessively worn.
Bleeding Air from the Hydraulic
System
Whenever servicing the hydraulic system, it is of the
utmost importance to keep any dirt or debris from
getting into the system. Clean off all parts before
disassembly and assembly. When any of the
hydraulic parts are disconnected or removed or when
the oil is changed, air must be bled from the system.
If air is entrained in the system, loss of power,
excessive heat, and damage to the hydraulic pumps
may occur. First, make sure the oil level in the
reservoir is correct. The level should be between 3”
– 4” below the top of the oil fill tube. Use fully
synthetic oil: Mobil 1 15W-
Height-of-Cut
Before adjusting the height-of-cut be sure the mower
blades are not spinning, and all four tires have proper
air pressure. Check for even tire wear. The height-
of-cut can be adjusted the following ways:
• Pull the deck lift lever on the right hand side of the
mower towards the rear of the mower until it clicks
once into the locked transport position. Then set
the mower blade height with the selector on the left
hand side of the mower. Once the proper height
setting is set on the left, pull back on the deck lift
lever on the right hand side and then lower the
lever towards the front of the machine until it stops
at the set height of cut.
Deck Adjustments
The mower deck can be adjusted for pitch and side-
to-side lever. Pitch is the relationship between the
front of the deck and the rear of the deck in regards
to height of cut. In most cases, a positive pitch (front
of the deck lower than the rear of the deck) of ¼” is
the optimum setting. These two adjustments can
easily be made by using the threaded deck hangers
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50. Lift the mower so that the rear wheels are off the
ground. Be careful to support the mower so that it
will not fall or tip while the system is
bled of air. With the bypass valves open and the
engine running, slowly move the control levers back
and forth five or six times. Now close the bypass
valves and with the engine running, slowly move the
control levers back and forth five or six times. It may
be necessary to repeat the above steps until all the
air is purged and the rear wheels are turning at
normal speed. After purging is complete, adjust the
oil level in the reservoir if necessary.
Battery Service
The battery is 12 volts and is a maintenance free
battery. Charge the battery only if it will not start the
mower properly. Remove the battery from the mower
before charging. Follow the instructions of the
battery charger for proper and safe charging of the
battery.
Cleaning the Mower
The underside of the mower deck should be checked
and cleaned twice daily, and more often if the grass
being mowed is lush or wet. The entire mower
should be cleaned daily at the end of the work day.
Cleaning should be done with a leaf blower or low-
pressure compressed air. Wash with water only
when necessary and do not use a pressure washer
or nozzle as the water can enter electrical
connections causing an electrical short, rust and
corrosion. When washing with water, do so when the
unit has cooled down. Washing a hot machine can
cause various unseen system damage. If water is
used for cleaning, immediately dry it with a leaf
blower or low-pressure compressed air. Once the
wash is complete, always lubricate and grease all
applicable areas.
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Maintenance Interval Chart
MAINTENANCE ITEM
Inspect for cracks in frame, cutter deck or other steel parts
Inspect all belts for wear, adjustment and alignment
Check all bolts and nuts for tightness (tighten as necessary)
Lubricate hand control lever pivot shafts with waterproof grease
Check hydraulic oil reservoir level and fill as needed - Use SYNTHETIC oil - Mobil1
15W-50
X
X
X
X
X
X
X
X
*1
X
X
X
X
X
X
Grease caster wheel bearings
X
X
X
X
Check tire pressure; Rear tires 18-22 psi-Front tires 30-40 psi. Some Front Casters
are equipped with non-pneumatic tires and do not require any air.
Check and clean engine cooling fins
Lubricate Operator Presence Control pivots and control rod with waterproof grease
Replace fuel filter
X
X
X
X
X
X
X
X
Engine *2
Engine *2
X
X
Lubricate choke control cable with WD-40
Check engine oil and add as needed
X
X
X
X
X
X
X
X
X
X
X
X
X
Engine *2
Engine *2
Engine *2
Engine *2
Check for fuel or oil leakage - correct as needed
Check and clean air intake screen
Clean engine blower screen and fins with compressed air
Clean mower with compressed air-do NOT use a pressure washer
Check for loose hardware (e-clips, snap rings, nuts, etc.)
X
X
X
X
Check blades for wear and sharpness (sharpen and balance or replace as necessary)
Check and adjust tire pressures to no more than maximum pressure listed on tire for
maintaining good traction and comfort
Clean out debris under blade belt cover
Scrape clean underside of cutter deck
Check blade mounting bolts for proper tightness
Check blade spindle mounting bolts for proper tightness
Clean air cleaner foam element
Inspect tires, replace as needed
Clean air cleaner paper element
Clean and re-gap spark plug (replace as necessary)
Change engine oil
Change engine oil filter
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Engine *2
X
X
Engine *2
Engine *2
Engine *2
Engine *2
Engine *2
X
X
X
X
X
Replace air cleaner paper element
Replace hydraulic oil filter with Original Wright Filter
Completely inspect for excessive wear in all parts of mower, including control
system (replace worn parts)
Inspect and replace (if necessary) worn main cutter deck idler pulleys or pulley
bearings (if applicable)
X
X
X
X
Replace (if necessary) excessively worn caster wheels and roller bearings
Remove battery and clean battery, battery box and battery cable ends
Clean combustion chamber
Check and adjust valve clearance
Clean and lap valve seating surface
X
X
X
X
X
X
X
Engine *2
Engine *2
Engine *2
NOTES:
*1 - Contact an authorized Dealer immediately if any cracks are found
*2 - Refer to Engine Manufacturers Owners Manual
*The service intervals indicated are to be used as a guide. Service should be performed more frequently as necessary by operating conditions*
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* * This Page Intentionally Left Blank * *
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WRIGHT MANUFACTURING, INC. POWER EQUIPMENT LIMITED WARRANTY
THIS WARRANTY SUPERSEDES ALL PREVIOUS ON UNITS WITH A RETAIL SALES DATE ON OR AFTER 04/01/05
Wright Manufacturing, Inc. (hereinafter: WMI) warrants to the original owner that the
The WMI mower, including any defective part, must be returned to an Authorized
WMI Service Dealer within the warranty period. The expense of lost production time
and delivering the mower to the Authorized WMI Service Dealer for warranty work
and the expense of returning it to the Owner after repair will be paid for by the
Owner. WMI’s responsibility is limited to making the required repairs and no claim of
breach of warranty shall be cause for cancellation or rescission of the contract of sale
of any WMI mower. This Warranty does not apply to any mower that was delivered
to an Owner prior to the Pre-Delivery Service as specified in the Owner’s Manual.
This Warranty does not apply to any mower that was shipped in a crate to the Owner
or delivered to the Owner by non-employees of an Authorized Dealer. For the
Owner’s protection and a valid Warranty, please note: WMI does not permit
Authorized Dealers to make non-face-to-face deliveries of the mower and any who
are found doing so are subject to immediate cancellation as Authorized Dealers.
This Warranty does not cover any mower that has been subject to misuse, neglect,
negligence, burning in any fire, an accident, or that has been operated or maintained
in any way contrary to the operating and maintenance instructions as specified in the
Owner’s Manual. The Warranty does not apply to any damage to the mower that is
the result of improper maintenance, or to any mower or parts that have not been
assembled or installed as specified in the Owner’s Manual. The Warranty does not
cover any mower that has been altered or modified changing performance or
durability. In addition, the Warranty does not extend to repairs made necessary by
normal wear, or by the use of parts or accessories which, in the reasonable judgment
of WMI, are either incompatible with the WMI mower or adversely affect its operation,
performance or durability.
new WMI mower accompanying this document will be free from manufacturing
defects in materials or workmanship subject to the following limitations and
exclusions. Any part of the WMI commercial mower manufactured by WMI and
found, in the reasonable judgment of WMI, to be defective in materials or
workmanship, will be repaired or replaced by an Authorized WMI Service Dealer
without charge for parts and (except as excluded below) labor. This Warranty is
limited to the original Owner and the mower this document was provided with and is
not transferable. Dealer demo units with less than fifty hours when first retailed shall
also be covered by this limited warranty. Proofs of Purchase, Authorized Dealer
performed Pre-Deliver Service and the First Eight Hour Service will be required by
the Authorized WMI Service Dealer to substantiate any warranty claims. All WMI
warranty work must be performed by an Authorized WMI Service Dealer and item
must be delivered to the dealer prior to the expiration of the warranty period. This
Warranty is limited to the following specified periods from the date of the original
retail purchase for defects in materials or workmanship and will commence upon the
date of original retail purchase. This warranty shall apply only if the warranty
registration form has been completed and returned to Wright Manufacturing, Inc.
within 30 days from the date of original retail purchase. This warranty includes only
the cost of parts and labor (when applicable). This warranty applies only to the
replacement of defective or otherwise warrantable WMI OEM parts being replaced
with WMI OEM parts.
•
•
•
•
All parts and components (except as noted below) – 2 years
Belts – 90 days
Battery – 90 days
Engine – warranty covered by engine manufacturer and handled through
the respective Authorized engine Dealers
WMI reserves the right to change or improve the design of any mower without
assuming any obligation to modify any mower previously manufactured.
All other implied warranties are limited in duration to the two (2) year warranty period
or ninety (90) days for mowers used for rental purposes. Accordingly, any such
implied warranties including merchantability, fitness for a particular purpose, or
otherwise, are disclaimed in their entirety after the expiration for the appropriate two
(2) year or ninety (90) day warranty period. WMI’s obligation under this Warranty is
strictly limited to the repair or replacement of defective parts and WMI does not
assume, or authorize anyone to assume for them, any other obligation. Some states
do not allow limitations on how long an implied warranty lasts, so the above limitation
may not apply.
Exclusions:
Any damage or deterioration due to normal use, wear and tear or exposure
All filters, engine oil, hydraulic oil, tires and tubes
Bent, fractured or broken parts occurring through impact or hard use
Clutch: linings, anti-rotation failure or other failure due to improper replacement
installation
Cost of regular maintenance service, parts or adjustments
Worn bearings (other than spindle bearings; see above)
Worn bushings, cotters, clips, pins and retainers
Grease fittings/zerks
Paint, paint fading, cosmetic imperfections and steel surface imperfections
Fabric, cushion and rubber grip wear or damage
Cutting blades, light bulbs, fuses
Damage due to loose pulleys on shafts
Damage due to loose wheel hubs on tapered hydraulic motor shafts
Fire Damage
WMI assumes no responsibility for incidental, consequential or other damages
including, but not limited to, expense for gasoline, expense of delivering the mower to
an Authorized WMI Service Dealer and expense of returning it to the Owner, damage
by fire, mechanic’s travel time, telephone charges, rental of a like product during the
time warranty repairs are being performed, travel, loss or damage to personal
property, loss of revenue, loss of use of the power equipment, loss of time or
inconvenience. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation or exclusion may not apply.
Abrasion or corrosion wear or damage
Repair Parts Replaced During Original Warranty
This Warranty gives you specific legal rights, and you may also have other rights
which vary from state to state.
All Repair parts (excluding wear or otherwise excluded items)
installed during the warranty period are warranted until the end of the
respective original period according to the categories above except in
the case that the respective original warranty period expires in less
than ninety (90) days after the installation of the part(s). If this
happens then the parts are warranted for a total of ninety (90) days
from the time of their installation.
This Warranty applies to all WMI mowers sold in the United States of America and
Canada.
For the location of the Authorized WMI Service Dealer nearest you or other
information, such as, Parts Lists and Owner’s Manuals visit our website at:
Rental Use
The above warranty periods are limited to maximum of ninety (90)
days for mowers that are used for rental purposes.
Wright Manufacturing, Inc.
4600-X Wedgewood Blvd.
Frederick, MD 21703
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4600X Wedgewood Blvd
Frederick, MD 21703
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