Wright Manufacturing Lawn Mower 26980 User Manual

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For Sentar Serial #26980 and higher until superseded  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  
your authorized Wright Dealer for a nominal charge. Also check www.wrightmfg.com for  
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  
 
TABLE OF CONTENTS  
 
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.)  
1
 
 
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.  
2
 
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  
3
 
 
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.  
4
 
 
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.  
5
 
 
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.  
WARNING  
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  
6
 
 
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.  
7
 
 
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.  
8
 
 
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:  
9
 
 
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  
10  
 
 
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  
11  
 
 
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.  
12  
 
 
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*  
13  
 
 
Maintenance Record  
Unit  
Hours  
Date  
Maintenance/Service Performed  
Shop/Technician  
14  
 
 
* * This Page Intentionally Left Blank * *  
 
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  
 
4600X Wedgewood Blvd  
Frederick, MD 21703  
 

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