Page 2 - Foreword; Bob Walker, President
Foreword Thank you. . .for purchasing a Walker mower. Every effort has been made to provide you with themost reliable mower on the market, and we are sure you will be among our many satisfied custom-ers. If for any reason this product does not perform to your expectations, please contact us at (970)...
Page 3 - Table of Contents
Table of Contents General Information ________________ 1 HIGHLIGHTED INFORMATION _____________ 1 GLOSSARY ____________________________ 1 IDENTIFYING NUMBER LOCATIONS ________ 1 ENGINE SERIAL NUMBER LOCATION ______ 2 SERVICING OF ENGINEAND DRIVETRAIN COMPONENTS __________ 2 Specifications ___________...
Page 4 - Maintenance Instructions
Table of Contents Maintenance Instructions __________ 44 MAINTENANCE SCHEDULE CHART _______ 44IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE _____ 45 Fuel System _________________________ 45 Starting/Stopping _____________________ 45 Cooling System ______________________ 45 Air Cleaner System ________...
Page 5 - General Information; Safety; mowed material and deposits it in the catcher.
General Information 1 HIGHLIGHTED INFORMATION Walker Manufacturing recommends that any ser-vice requiring special training or tools be performedby an authorized Walker Mower Dealer. There areseveral general practices to be aware of in the areaof safety. Most accidents associated with the oper-ation ...
Page 7 - Specifications; MODEL; ENGINE
Specifications 3 MODEL MT 20.0 HP MT 25.0 HP ENGINE Manufacturer/Model Kohler CH20, 2 Cyl.,Gasoline (Air Cooled) Kohler CH25, 2 Cyl.,Gasoline (Air Cooled) Displacement 38.1 cu. in. (624 cc) 44.0 cu. in. (725 cc) HP (@ 3600 RPM) 20.0 25.0 Max. RPM (No Load) 3750 3750 Governed RPM 3600 3600 Max. Torqu...
Page 8 - Transmission Fluid
Specifications 4 MODEL MT 20.0 HP MT 25.0 HP TRANSMISSION (continued) Service Brake Dynamic Braking throughHydrostatic Transmission Dynamic Braking throughHydrostatic Transmission Parking Brake Mechanical Pin Lock inTransmission Gear Mechanical Pin Lock inTransmission Gear Neutral Transmission Relea...
Page 9 - TIRE PRESSURE
Specifications 5 MODEL MT 20.0 HP MT 25.0 HP TIRE PRESSURE Deck Caster Wheel 20 PSI (137 kPa) 20 PSI (137 kPa) Drive 15 PSI (103 kPa) 15 PSI (103 kPa) Rear 20 PSI (137 kPa) 20 PSI (137 kPa) DIMENSIONS (Tractor and Mower)* Length 91 in. (231 cm) 91 in. (231 cm) Width 49 in. (124 cm) 49 in. (124 cm) H...
Page 10 - DRIVE BELTS
Specifications 6 MODEL MT 20.0 HP MT 25.0 HP DRIVE BELTS Engine PTO Walker P/N 8230 Walker P/N 8230 Jackshaft Drive Gates 3VX355(or Walker P/N 6231) Gates 3VX355(or Walker P/N 6231) Ground Drive, Micro-V Walker P/N 7248 Walker P/N 7248 Blower (GHS Model) Gates 3VX280(or Walker P/N 7234) Gates 3VX280...
Page 11 - Component Identification; Front View and Right Side View
Component Identification 7 Front View and Right Side View NOTE: Control Identification shown in Operating Instructions section. Grass Handling System 7.0 Bushel Catcher Anti-Scuff Roller Transmission Control Rod Adjustment Nut (RH) Deck Support Arms Transmission Control Rod Adjustment Nut (LH) Deck ...
Page 12 - Rear View and Left Side View
Component Identification 8 Catcher Door Gas Spring Instrument Panel Guard Instrument Panel Box (Shock Mounted) Deck Lift Rod Left Hand Drive Wheel Muffler Tailpipe Oil Drain Plug Catcher Door Handle Dump Plate Catcher Door Anti-Scuff Roller Oil Filter Tailwheel Fork and Wheels Removable Grass Catche...
Page 14 - Safety Instructions; BEFORE OPERATING; Do not operate the machine barefoot or wearing; DANGER
Safety Instructions 10 Pay particular attention to any information labeledDANGER, WARNING, CAUTION, IMPORTANT,and NOTE in this manual. When you see the Safety Alert Symbol ( ),read, understand, and follow the instructions. Fail-ure to comply with safety instructions may result inpersonal injury. The...
Page 15 - OPERATING
Safety Instructions 11 6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate thismachine while wearing shorts; always wearadequate protective clothing, including longpants. Wearing safety glasses, safety shoes,and a helmet is advisable and required by somelocal ...
Page 16 - the following recommendations:
Safety Instructions 12 10. Disengage the blade drive when transporting the machine across drives, sidewalks, etc. Ne-ver raise the mower deck while blades arerotating. 11. The maximum recommended side slope op- erating angle is 20 degrees or 33% grade.When operating the machine on a slope, reducespe...
Page 19 - Catcher Door Hinge Bar,
Safety Instructions 15 Instrument Panel (8823) Fender, RH Side (7802) Catcher Door Hinge Bar, LH and RH Sides (5868) Left Side of Operator Seat (7819) Right Side, Below Operator Seat (7809) Top of Blower Housing (5819) Deck Carrier Frame (8653) Jackshaft Support Adjacent to Dipstick (7827) Gear Axle...
Page 20 - Assembly Instructions; SETUP INSTRUCTIONS; Avoid spillage and contact with skin,
Assembly Instructions 16 SETUP INSTRUCTIONS Walker Mowers are shipped partially assembled.After uncrating the tractor and mower deck, initialsetup is required. NOTE: During the process of unpacking, any dam-aged or missing parts should be noted and reportedto the delivering carrier immediately (put ...
Page 21 - Battery Charging; Battery Clamp
Assembly Instructions 17 3. After the battery is filled with electrolyte, replacethe filler caps and charge the battery. Refer to Battery Charging . Battery Charging 1. Charge the battery at 15 amps for 10 minutes.DO NOT exceed 20 amps maximum recom-mended charging rate. Charge until specificgravity...
Page 22 - PTO Shaft Guard Installation; WARNING
Assembly Instructions 18 Deck Caster Wheel Installation NOTE: If semi-pneumatic wheels are installed,make sure the spacer washers fit over the spacertube and are not caught between the fork and theend of the tube. The washers should move freelyon the axle spacer tube. 5. Grease the caster wheel bear...
Page 23 - Installing PTO Quick Coupler
Assembly Instructions 19 NOTE: When installing the DSD52 or DSD62Mower deck, make sure to retract the dollywheel after mounting the deck on the tractor. 3. If the deck is rear discharge (GHS equippedmodel), the rear discharge chute will need to bealigned and connected to the blower inlet dur-ing the...
Page 24 - Deck Counterweight Spring Installation; Deck Leveling
Assembly Instructions 20 Deck Counterweight Spring Installation Deck Leveling 1. Position mower on a smooth, level surface. Set the cutting height to the highest position - 4 in.(102 mm) - for easy access under the deck tomeasure blade height. Refer to ADJUSTINGCUTTING HEIGHT in Operating Instructio...
Page 25 - Checking Engine Crankcase
Assembly Instructions 21 PREOPERATING CHECKLIST Before operating the mower for the first time, and asa routine before daily operations, it is important tomake sure the mower is properly prepared andready for operation. The following is a list of items tobe checked. (For a mower with frequent operati...
Page 26 - structions
Assembly Instructions 22 CHECK GEAR AXLE OIL LEVEL Refer to Gear Axle Lubrication in Maintenance In- structions . INSPECT FOUR (4) DRIVE BELTS Engine PTO Drive, Jackshaft Drive, HydrostaticGround Drive, and GHS Blower Drive (if equipped). CHECK HYDROSTATIC TRANSMISSION OIL LEVEL Refer to LUBRICATION...
Page 27 - NESS, AND SECURITY OF MOUNTING; QUIRED; CAUTION
Assembly Instructions 23 CHECK MOWER BLADE CONDITION, SHARP- NESS, AND SECURITY OF MOUNTING The blade mounting nut should be tightened to60 ft-lb (81.3 N ⋅ m). If blade sharpening is required, refer to CHECKING/SERVICING for SharpenMower Blades in Maintenance Instructions . ADJUST MOWER CUTTING HEIG...
Page 28 - Operating Instructions; Operating Controls
Operating Instructions 24 CONTROL IDENTIFICATION, LOCATION, AND FUNCTION Operating Controls Engine Choke The choke control lever (black knob) is located onthe left side of the seat. To start a cold engine, movethe choke control forward to the ON position. Afterengine starts, move the choke control t...
Page 29 - Choke and Throttle Location; full signal switch are activat-; Parking Brake; Choke
Operating Instructions 25 Choke and Throttle Location Engine Throttle The throttle control lever (red knob) is located on theleft side of the seat and is used to control enginespeed. Moving the lever forward toward the FASTposition increases engine speed; moving it back-ward toward the IDLE position...
Page 30 - Front Body Latch Release
Operating Instructions 26 Front Body Latch Release The front portion of the tractor body hinges forwardfor maintenance access and is latched down in theOPERATING position. To raise the body, move thelatch release forward. Front Body Latch Release Transmission Lockout Levers The transmission lockout ...
Page 31 - Operating Controls (Top View from Drivers Point of View)
Operating Instructions 27 CHOKE THROTTLE BLADE CLUTCH (PTO) Pull Up to Engage PARKING BRAKE Intermediate Ground Speed Position The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers LEFT WHEEL STEERING LEVER RIGHT WHEEL STEERING LEVER Reverse Drive Wheel Motion P...
Page 32 - Instrument Panel
Operating Instructions 28 Instrument Panel Instrument Panel This illustration shows the configuration of theswitches and indicators located on the instrumentpanel. Hourmeter Voltmeter Oil Pressure Warning Light Over Temperature Warning Light Ignition Switch Light Switch (Optional) Warning Horn
Page 33 - Ignition Switch
Operating Instructions 29 Hourmeter The hourmeter displays operating time accumu-lated while the ignition switch is in the ON position. Voltmeter The voltmeter displays battery and charging systemvoltage. An indication of low or high voltage (below11.5 volts or above 15.5 volts) indicates an electri...
Page 34 - STARTING THE ENGINE; Cold Start
Operating Instructions 30 STARTING THE ENGINE 1. Before attempting to start the engine, makesure the operator is in the seat, the ForwardSpeed Control is in NEUTRAL-PARK position,and the blade clutch and parking brake areDISENGAGED. NOTE: Release parking brake to prevent extraload on the starter if ...
Page 35 - Maintenance
Operating Instructions 31 IMPORTANT: Make sure the choke is in the OFFposition during normal engine operation; runningwith the choke in the ON position CAN damage theengine. ADJUSTING GROUND SPEED AND STEERING IMPORTANT: If the DSD52 or DSD62 Mowerdeck is installed on the tractor, make sure the doll...
Page 36 - Correct Operator Hand Position
Operating Instructions 32 Correct Operator Hand Position on the Controls 3. Reverse direction of the mower by pulling bothlevers backward. NOTE: Smooth action on the steering leverswill produce smooth mower operation. Remem-ber to keep the engine and ground speed slowuntil learning the control respo...
Page 37 - Blade Clutch Engaged
Operating Instructions 33 Blade Clutch Engaged Blade Clutch Disengaged STOPPING THE MACHINE 1. Slow the engine to a fast idle; put the throttle inthe 1/2 throttle position. 2. Pull the steering levers to the NEUTRAL posi-tion and then move the FSC lever backward tothe NEUTRAL-PARK position. 3. Disen...
Page 38 - ADJUSTING CUTTING HEIGHT
Operating Instructions 34 ADJUSTING CUTTING HEIGHT Cutting height is adjusted by positioning the four re-tainer hitch pins in a series of seven vertical holes onthe deck support pins. Lift handles have been pro-vided on each end of the deck to assist in raising thedeck while positioning the hitch pi...
Page 39 - RECOMMENDATIONS FOR MOWING
Operating Instructions 35 RECOMMENDATIONS FOR MOWING IMPORTANT: Operate the engine at full speedwhen mowing, to allow the engine to produce fullhorsepower and to increase efficiency of the enginecooling system. • Keep the mower deck and discharge chute clean. • Mow with sharp blades. A dull blade te...
Page 40 - Do not move the tractor with the deck in the tilt-; When transporting a tractor with the deck in the
Operating Instructions 36 RECOMMENDATIONS FOR TILT-UP DECK OPERATION/TRANSPORT To avoid potential deck and/or tractor damage whileusing the tilt-up deck, the following recommenda-tions are offered: • Do not move the tractor with the deck in the tilt- up position since both the roller wheels (on the ...
Page 41 - GHS Flow and Components
Operating Instructions 37 GRASS HANDLING SYSTEM (GHS)GHS Model Only GHS Flow and Components PTO and Blade Gear Drive PTO Clutch Rear Discharge Mower Deck Deck Discharge Chute Blower Body Chute Assembly Powerfil ® Delivery Spout Grass Catcher Catcher Door Spring Catcher Door Exhaust Deflector Exhaust...
Page 42 - ROTATING BLOWER BLADES; Blower
Operating Instructions 38 General Information The Grass Handling System (GHS) consists of arear discharge mower deck connected to a 10 in.(25 cm) blower and a rear mounted grass catcherwith 7.0 bushel (246 liters) capacity or optional 9.5bushel (335 liters) capacity. The GHS blower oper-ates any tim...
Page 43 - Clogging Checklist; FORWARD
Operating Instructions 39 Clogging Checklist In case of clogging, there will be a distinct changein the sound of the blower, i.e., the blower soundwill stop. Also, the mower deck will begin to leave atrail of grass clippings. When this occurs, stop theengine, disconnect the spark plug wires, and mak...
Page 45 - Dumping the Catcher; PINCH POINT - SPRING LOADED DOOR
Operating Instructions 41 Dumping the Catcher For dumping, the catcher either tailgate dumps intoa disposal area or dumps into the optional dumpbag. The dump bag is a reusable nylon fabric bagdesigned to conveniently move grass clippings fromthe catcher to a remote disposal area or container. Tailga...
Page 46 - Dumping Catcher into Dump Bag; Dump Handle
Operating Instructions 42 3. Hook the bottom of the bag over the rearbumper while lifting on the handle strap. 4. Tilt the catcher back to dump into the bag by lift-ing on the catcher lift handle on the lowerfront corner of the catcher with the one handwhile continuing to hold up on the bag strapwit...
Page 47 - Power Dump Components
Operating Instructions 43 Power Dump Components Grass Catcher Cable Guide Catcher Door Gas Spring Catcher Door Cable Rod Guide Cable Assembly Actuator Mount Assembly Dog Leg Assembly Fork Lift Channel Door Actuator Arm Gas Spring Rubber Bumper Power Dump Ram Actuator
Page 48 - Change every 2 years or 1000 hours
Maintenance Instructions 44 MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MT Service Item Daily 25 Hours 100 Hours 200 Hours Yearly Every 2 Years Ref. Page Check Engine Crankcase Oil Level x 46 Check/Clean Engine Air Cooling System* x 57 Check Security of Air Filtration Componen...
Page 49 - KOHLER TIPS; Fuel System
Maintenance Instructions KOHLER TIPS 45 IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE Fuel System • Fuel must be clean - free from water, dirt, and or- ganic material. • Change fuel filter on a regular basis and when contamination is suspected or found in the fuel. Starting/Stopping • For starting in...
Page 50 - LUBRICATION; If additional oil is needed, refer to; Full Mark
Maintenance Instructions LUBRICATION 46 LUBRICATION Proper lubrication is an important maintenance pro-cedure. It reduces wear and makes the machine qui-eter and easier to operate. Engine Oil Engine Break-In Oil No special break-in oil is required. The engine isserviced with 10W-30, Service Class SG...
Page 51 - Oil Drain/Oil Filter Location; in
Maintenance Instructions LUBRICATION 47 1. Park the mower on a level surface with the en-gine stopped. The engine oil should be warmbefore draining. If not warm from operation,start the engine and run a few minutes to warmthe oil. 2. Remove the dipstick and the oil drain plug and drain the oil into ...
Page 52 - Illustrated Parts
Maintenance Instructions LUBRICATION 48 Ident Lubrication No. No. Location Type Places Ident Lubrication No. No. Location Type Places 1 Deck Caster Wheel Fork Pivot Grease 2 2 Deck Caster Wheel Bearing Grease 2 3 Tee Gearbox, Deck Oil * 1 4 Blade Drive Gearbox Oil * 2 5 PTO Shaft Guard Hinge Oil 1 6...
Page 53 - Chassis and Deck Lubrication Points
Maintenance Instructions LUBRICATION 49 Chassis and Deck Lubrication Points
Page 54 - Mower Deck Gearbox Lubrication; DSD52 or DSD62 Mower Deck Lubrication
Maintenance Instructions LUBRICATION 50 Mower Deck Gearbox Lubrication NOTE: These instructions apply to all mower deckswith gear-driven blades. Refer to DSD52 or DSD62Mower Deck Lubrication in this section for theDSD52 or DSD62 deck with belt-driven blades. The mower deck gearboxes (tee gearbox and...
Page 55 - Tractor PTO Gearbox Lubrication
Maintenance Instructions LUBRICATION 51 2. Check the oil level in the belt drive gearbox ev- ery 100 hours (or sooner if a visible oil leak hasdeveloped). With the deck in the normal oper-ating position, remove the level plug in the sideof the gearcase. Add SAE E.P. (Extreme Pres-sure) 90W oil to ma...
Page 56 - Hydrostatic Transmission Fluid
Maintenance Instructions LUBRICATION 52 Hydrostatic Transmission Fluid Checking Hydrostatic Transmission Fluid Level Hydrostatic transmission fluid level should bechecked every 25 hours of machine operation. It is preferable to check the fluid level when fluid iscold. Check fluid level as follows: 1...
Page 57 - CLEANING
Maintenance Instructions LUBRICATION/CLEANING 53 3. Reinstall the lower drain plug, making sure therubber O-ring on the plug is in place and ingood condition. 4. Refill the transmission through the air bleedplug hole until it is as full as possible. IMPORTANT: Avoid fluid contamination whenfilling t...
Page 58 - Turbine Precleaner
Maintenance Instructions CLEANING 54 Turbine Precleaner The turbine precleaner is mounted on a remote airintake tube connected to the Donaldson air cleaner.A spinning fan driven by the intake airflow separatesdust from the air, giving the initial stage of air clean-ing. Dust particles are exhausted ...
Page 59 - Air Filter Element Replacement
Maintenance Instructions CLEANING 55 1. Release the top and bottom cover latches andremove the air cleaner cover. Wash the coverand Vacuator™ valve. Check that these com-ponents are in good condition. The Vacuator™valve is subject to wear and deterioration andshould be replaced yearly or when damage...
Page 60 - • Foam Precleaner; Reinstall the air cleaner cover and mounting nut.; • Paper Element
Maintenance Instructions CLEANING 56 Kohler Air Cleaner (Secondary) NOTE: The Kohler Air Cleaner should only be ser-viced more often than a yearly interval if there areindications that the Donaldson Radialseal (prima- ry) has failed. • Foam Precleaner An oiled, foam precleaner surrounds the paper ...
Page 61 - Air Filter Reinstallation
Maintenance Instructions CLEANING 57 Air Filter Reinstallation Engine Cooling System Air Intake System To prevent engine overheating and possible enginedamage, clean grass clippings, chaff, and dirt fromthe rotating engine air intake screen after every 8hours of operation. In certain mowing conditio...
Page 62 - Grass Buildup in Mower Housing
Maintenance Instructions CLEANING 58 Grass Buildup in Mower Housing Non-Tilting Decks 1. Raise the deck and secure it in the UP positionby hooking the deck lift rod into the body bracketbelow the counterweight spring clip. The rod ishinged and is stowed along the footrest of thedeck carrier frame. A...
Page 63 - GHS Blower
Maintenance Instructions CLEANING 59 NOTE: While some degree of material buildupin the mower deck housing can be tolerated, apoint is finally reached where cutting qualitydeteriorates and clogging begins to occurbecause of too much buildup on the baffling andhousing. 4. Lower the deck to the normal ...
Page 64 - Hydrostatic Transmission Cooling Fins; Remove battery cell filler caps.
60 Maintenance Instructions CLEANING/ CHECKING/SERVICING Hydrostatic Transmission Cooling Fins Keeping the cooling fins on the hydrostatic transmis-sions clean and free of obstruction is essential toavoid overheating the transmission fluid and short-ening transmission life. The cooling fins should b...
Page 65 - Cleaning the Terminals; Inflate tires to pressures shown below:
61 Maintenance Instructions CHECKING/SERVICING 3. Replace filler caps. IMPORTANT: DO NOT overfill the battery. Electro-lyte will overflow through the vented caps onto partsof the machine and WILL result in severe corrosion. Cleaning the Terminals If battery terminals are corroded, remove batteryfrom...
Page 66 - Mower Blade Profile For Sharpening
Maintenance Instructions CHECKING/SERVICING 62 4. If the blade cutting edge is dull or nicked, itshould be sharpened. Remove blades forsharpening by grasping the end of the blade us-ing a rag or a thick, padded glove, while loosen-ing and removing the nut, lock washer, and flatwasher that mounts the...
Page 67 - Jackshaft Drive Belt
63 Maintenance Instructions CHECKING/SERVICING/ REPLACING/REPAIRING Mower Deck Gearbox Oil Seals The mower deck gearbox seals should be inspectedevery 25 hours for evidence of oil leaking; particu-larly the lower oil seal on the blade drive gear-box. This seal is protected by the trash guard on theb...
Page 68 - Belt Locations
Maintenance Instructions REPLACING/REPAIRING 64 Jackshaft Drive Belt Engine PTO Belt GHS Blower Belt (GHS Model Only) Hydrostatic Ground Drive Belt Belt Locations
Page 69 - Engine PTO Drive Belt (3 Groove Power Band)
Maintenance Instructions REPLACING/REPAIRING 65 Engine PTO Drive Belt (3 Groove Power Band) 1. To remove the engine PTO drive belt: a. Remove the jackshaft drive belt from itsidler pulley (by pushing down on idler pul-ley) and let the belt drop down out of theway. NOTE: Step (a) is not essential to ...
Page 71 - GHS Blower Drive Belt
Maintenance Instructions REPLACING/REPAIRING 67 GHS Blower Drive Belt 1. Remove the GHS blower drive belt by unhook-ing the belt tension spring from the hook on thechassis frame (located above the blower pul-ley). Lift the belt tightener idler pulley up and rollbelt off the pulleys. Chassis Frame Ho...
Page 72 - Hydrostatic Ground Drive Belt
Maintenance Instructions REPLACING/REPAIRING 68 Hydrostatic Ground Drive Belt 1. To remove the hydrostatic ground drive belt: a. Raise the spring-loaded belt tightener armand idler pulley to relax belt. b. Slide belt off pulleys, then release the idler. Hydrostatic Ground Drive Belt Idler Pulley Bel...
Page 73 - Fuel Filter
Maintenance Instructions REPLACING/REPAIRING 69 Fuel Filter Model MT is equipped with an in-line fuel filter. Vi-sually inspect the filter periodically, and replace thefilter yearly. Fuel Filter Location IMPORTANT: Replace the fuel filter only in a cleanarea where the fuel line and connections will ...
Page 74 - Mower Blades
Maintenance Instructions REPLACING/REPAIRING 70 After reinstalling the blade, check blade timing bymoving blades through one (1) complete revolu-tion. Make sure blade tips pass clear of each other.If timing is incorrect, refer to Mower Deck GearboxReplacement in this section. Mower Blades Mower blad...
Page 75 - Mower Deck Gearboxes; GHS Blower Assembly Removal
Maintenance Instructions REPLACING/REPAIRING 71 NOTE: With oil flow throughout the unitizedgear drive assembly; if one gearbox has internaldamage or excessive wear, the remaining gear-boxes and connector tubes should be complete-ly disassembled and thoroughly flushed out withsolvent before reassembl...
Page 76 - Blower Wheel Removal
Maintenance Instructions REPLACING/REPAIRING 72 4. Remove the blower assembly from the chassisas follows: a. Remove the blower skid bar by removing front and rear mounting bolts from the skidbar (underneath the blower) and removingthe bolt connecting the blower housing tothe skid bar. b. Remove the ...
Page 77 - ADJUSTMENTS; Adjust switch to the point where the starter en-; PTO Switch
73 Maintenance Instructions ADJUSTMENTS ADJUSTMENTS Safety Switches There are three (3) safety interlock switches on thetractor. Use the panel nuts on the switch body to po-sition the switch for proper activation of the switch.The adjustment procedure for each switch is: Seat Switch Adjust switch po...
Page 78 - Clutch Engagement/Belt Tension
Maintenance Instructions ADJUSTMENTS 74 Blade Clutch (PTO) Clutch Engagement/Belt Tension The clutch engagement and PTO belt tension areadjusted using the clutch actuator rod. Initially, afterinstalling a new PTO belt, after 10 hours and every100 hours thereafter, check and adjust for the twodimensi...
Page 79 - Clutch Disengagement/Brake Action; PTO Clutch Disengaged
Maintenance Instructions ADJUSTMENTS 75 Clutch Disengagement/Brake Action The declutched or disengaged position of theblade clutch idler pulley is adjustable and is set togive belt release without excessive slack and toapply the blade brake. The blade brake is activatedby the brake actuator rod link...
Page 80 - Stop Block Eccentric Adjustment - Step 1
Maintenance Instructions ADJUSTMENTS 76 Use the following procedures to check and adjustclutch disengagement and brake action: Stop Block Eccentric Adjustment - Step 1 Use the stop block attached to PTO belt tightenerarm to set the bottom position of the clutch idler pul-ley in the disengaged positi...
Page 81 - Blade Brake Band Adjustment
Maintenance Instructions ADJUSTMENTS 77 Blade Brake Band Adjustment NOTE: The length of the actuator rod is adjustedby disconnecting the bottom clevis and shorteningor lengthening accordingly. The standard pre-setlength of the actuator rod is set at the factory at8-1/4 in. (209 mm). Brake Actuator R...
Page 82 - Forward Speed Control Stop
Maintenance Instructions ADJUSTMENTS 78 3. Tighten the jam nut on the forward travel stopadjusting bolt. Forward Speed Control Stop and Steering Lever Adjustment Steering Lever End Play Adjustment - Step 2 1. Position the FSC lever to the most FORWARDposition. 2. Loosen the adjustment nut on each st...
Page 83 - Straight Ground Travel Adjustment - Step 4
Maintenance Instructions ADJUSTMENTS 79 Straight Ground Travel Adjustment - Step 4 1. Sit in the seat, start the engine (operate at nor-mal speed), and with the FSC in the NEUTRAL-PARK position check for forward movementof either drive wheel (if either wheel movesbackward, refer back to Neutral Func...
Page 84 - Tilt-Up Deck Adjustable Stop; Set Screw
Maintenance Instructions ADJUSTMENTS 80 Tilt-Up Deck Adjustable Stop When the carrier frame hinge joint is properly adjust-ed, the deck lock levers should move in and out of theengaged and disengaged positions freely. All fourhitch pins used for height adjustment should sit flushon the washers above...
Page 85 - Carburetor Adjustment
Maintenance Instructions ADJUSTMENTS 81 2. Preliminary Setting: Turn the idle mixture nee-dle valve out (counterclockwise) 1-1/2 turnsfrom the closed position. This initial adjust-ment will allow the engine to be started andwarmed up prior to the final adjustment. Carburetor Adjustment 3. Start the ...
Page 86 - ELECTRICAL SYSTEM; Adjustment (When Horn Sounds at the Wrong Time)
82 Maintenance Instructions ADJUSTMENTS/ ELECTRICAL SYSTEM Checking the Grass-Pak ® Switch Adjustment (When Horn Sounds at the Wrong Time) Very little, if any, adjustment to the Grass-Pak ® switch is required. However, to fine tune the timingof the full signal, the vertical position of the switchvan...
Page 87 - Wiring Diagram - Model MT
83 Maintenance Instructions ELECTRICAL SYSTEM Wiring Diagram - Model MT
Page 88 - Operator’s Notes
Page 92 - Sound Test; Vibration Level; Lwa; Vibration Level
WALKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614 FORM NO. 101298 PRINTED IN USA © 1998 WALKER MFG. CO Sound - Model MT20 Sound Test Sound test conducted was in accordance with 79/113/EEC and was performed on 22 March 96 under the conditions listed: General Condition: C...
