Wright Manufacturing Sentar 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For Sentar Serial #26980 and higher until superseded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
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 WEDGE WOO D BLVD - FREDERICK, MD 21703
for
Foreword
Welcome to the progressive group of mowing professionals who use Wright mowers. We are focused on giving
you advanced engineering and quality construction in each mower we build.
This manual explains the features and promotes safer use of the mower. Please read it and follow the
instructions carefully so that you can have many years of productive mowing.
For service, remember that your Wright dealer knows your mower best and is interested in your satisfaction. He
can provide you with quality maintenance and other assistance that you may need.
Please give this manual to anyone who may use the mower for them to study before they operate it. Give the
manual to anyone to whom you may sell the mower in the future. It is important that the next owner receive this
information also.
As Wright Manufacturing, Inc. is constantly seeking ways to improve its products, the mower you have may differ
slightly from the information and specifications in this manual. Because of our continuous product improvement,
Wright reserves the option to make changes at any time without notice.
Wright Manufacturing, Inc.
SAFETY ALERT
This is the safety alert symbol. It is used throughout this manual and on the mower’s safety
labels to alert you to potential personal injury hazards. Obey all safety messages that follow
this symbol to avoid possible injury or death. Read these instructions carefully. It is essential
that you read the instructions and safety precautions before you attempt to work on or use this
unit.
WARNING
This symbol with the “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, may result in minor or moderate injury.
©1998-2001 Wright Manufacturing, Inc. All rights reserved. This material may not be reproduced or copied, in whole or part, without
written permission from Wright Manufacturing, Inc. Grass Gobbler, Gobbler, Leaf Gobbler, Velke, Pro 1, X2, Stander, and Sentar are
trademarks of Wright Manufacturing, Inc.
TABLE OF CONTENTS
Pre-Delivery Service of Mower by Dealer .........................................................1
SAFETY INSTRUCTION MANUAL......................................................................3
INTRODUCTION....................................................................................................................3
GENERAL SAFETY INSTRUCTIONS ...................................................................................3
Owner/User Notice: ..............................................................................................................3
User Experience and Qualifications: ..................................................................................3
User Clothing:.......................................................................................................................4
Inspection of Mower Before Each Use: ..............................................................................4
Scheduled Mower Maintenance Safety:..............................................................................4
Work Area Conditions and Inspection:...............................................................................4
Initial Operating Safety Guidelines:....................................................................................4
Replacement Parts:..............................................................................................................5
Operation on Slopes: ...........................................................................................................5
Operation During Zero-Radius Turns: ................................................................................6
Operation in Reverse: ..........................................................................................................6
Operation in Forward Direction:..........................................................................................6
Fuel Safety: ...........................................................................................................................6
Hydraulic Safety: ..................................................................................................................7
OPERATING INSTRUCTIONS.............................................................................8
Inspect Mower Before Each Use:........................................................................................8
How to start the mower:.......................................................................................................8
Unusual noises or irregular operation:...............................................................................8
How to drive the mower:......................................................................................................8
How to Stop and Park the Mower........................................................................................8
How to Drive the Mower Over a Curb..................................................................................9
Never drive straight onto or off a curb. ..............................................................................9
How to Use the Mower on Varying Terrain.........................................................................9
How to Adjust Neutral ..........................................................................................................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
How to Test the Operator Presence Control (OPC) Switch.............................................11
Service and Adjustments...................................................................................................11
Tire Maintenance and Pressure......................................................................................................... 11
Height-of-Cut.................................................................................................................................... 11
Deck Adjustments............................................................................................................................. 11
Belt Tension Adjustment.................................................................................................................. 11
How to Move the Mower if the Engine Won’t Start ........................................................................ 11
Bleeding Air from the Hydraulic System......................................................................................... 11
Battery Service.................................................................................................................................. 12
Cleaning the Mower.......................................................................................................................... 12
Maintenance Interval Chart..............................................................................13
Maintenance Record.........................................................................................14
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
WARNING
The Wright Sentar is shipped completely assembled and has been adjuste d 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 bl ade 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 a nd 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 adju st at this
time. See Deck adjustments section of this manual for further instructions.
• Lubricate all moving parts (see Maintenance Items
• 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 operat e 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 mowe r’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.)
Service of the mower. Only your authorized Wright dealer
should perform the Pre-Delivery Service of the mower.
section of this manual).
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 o r 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 operat i on 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
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.
on the Product Registration Form and have the customer fill out
The mower is now ready for delivery to your customer.
2
This symbol with the word “WARNING” indicates a
potentially hazardous situation which, if not
avoided, could result in death or serious injury.
WARNING
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
may result in serious bodily injury or death. Accident
and hazard prevention are dependent upon the
awareness, concern, wisdom, and proper training of
the personnel involved in the operation, transport,
maintenance, and storage of the equipment. Make
sure every operator is properly trained and thoroughly
familiar with all of the information in this manual
before operating the equipment.
GENERAL SAFETY INSTRUCTIONS
The Wright Sentar is designed with your safety in
mind. It has the following safety systems with which
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
• 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
CAUTION
This symbol with the word “CAUTION”
indicates a potentially hazardous situation
which, if not avoided, could result in minor or
moderate injury.
WARNING
Owner/User Notice:
The owner’s/us ct themselves
and all potential users in the safe operation of this
equipment and be sure they read and follow the
instructions in this safety manual and other material
provided by Wright Manufacturing, Inc. before using or
allowing others to operate the equipment. Do not
operate this unit unless you carefully read, understand
and follow the assembly, installation, and safety
instructions contained in this manual and the warning
decals provided on the unit. Do not allow other
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.
User Experience and Qualifications:
This p
roduct is designed for use by physically fit,
experienced, professional commercial mower
operators who have a minimum of 160 hours o
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 th
mower without proper instruction mentioned above.
Never allow passengers on the mower.
er’s obligation is to instru
WARNING
f
e
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