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Walker MT, MTL, MTEFI, MTLEFI Owner's Manual

20.0hp/25.0hp/26.0hp rider lawn mower
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OWNER'S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MT (20.0 HP)
Model MTL (25.0 HP)
Model MTEFI (26.0 HP)
(Covers 2004 Production)
™
Please Read and Save These Instructions
Effective Date: 01-01-04
For Safety, Read All Safety and Operation
P/N 8000-9
Instructions Prior to Operating Machine
Price $5.00

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Summary of Contents for Walker MT, MTL, MTEFI, MTLEFI

  • Page 1 OWNER’S MANUAL Safety, Assembly, Operating, and Maintenance Instructions Model MT (20.0 HP) Model MTL (25.0 HP) Model MTEFI (26.0 HP) (Covers 2004 Production) ™ Please Read and Save These Instructions Effective Date: 01-01-04 For Safety, Read All Safety and Operation P/N 8000-9 Instructions Prior to Operating Machine Price $5.00...
  • Page 2 Foreword Thank you. . .for purchasing a Walker mower. Every effort has been made to provide you with the most 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) 221-5614.

  • Page 3: Table Of Contents

    Table of Contents General Information ________________ 4 HIGHLIGHTED INFORMATION _____________ 4 GLOSSARY ____________________________ 4 IDENTIFYING NUMBER LOCATIONS________ 4 ENGINE SERIAL NUMBER LOCATION ______ 5 SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS ______________ 5 Specifications ________________________ 6 ENGINE________________________________ 6 ELECTRICAL SYSTEM ___________________ 7 TRANSMISSION_________________________ 7 BLADE DRIVE __________________________ 8 TIRE SIZE ______________________________ 8...
  • Page 4 Table of Contents Maintenance Instructions MAINTENANCE SCHEDULE CHART _______ 52 IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE _______________ 53 Fuel System _________________________ 53 Starting/Stopping _____________________ 53 Cooling System - MT, MTEFI____________ 53 Cooling System - MTL _________________ 53 Air Cleaner System ___________________ 53 Oil _________________________________ 54 LUBRICATION _________________________ 54 Engine Oil ___________________________ 54...
  • Page 5 Table of Contents ELECTRICAL SYSTEM __________________ 92 Circuit Breakers ______________________ 92 Wiring Diagram - Model MT_____________ 93 Wiring Diagram - Model MTEFI __________ 94 Wiring Diagram - Model MTL____________ 96 Warranty ___________________________ 97...

  • Page 6: General Information

    Walker Manufacturing recommends that any ser- vice requiring special training or tools be performed by an authorized Walker Mower Dealer. There are several general practices to be aware of in the area of safety. Most accidents associated with the oper-...

  • Page 7: Engine Serial Number Location

    If you have any difficulty finding an authorized outlet or obtaining warranty service, please contact our Ser- vice Department for assistance: Walker Manufacturing Company Service manuals are available for each of these components from their respective manufacturers as follows:...

  • Page 8: Specifications

    Specifications MODEL ENGINE Manufacturer/Model Displacement Displacement Displacement HP (@ 3600 RPM) HP (@ 3600 RPM) HP (@ 3600 RPM) Max. RPM (No Load) Governed RPM Max. Torque [ft-lb (N m) @ RPM] Idle RPM Spark Plug Type Spark Plug Gap Crankcase Capacity Crankcase Capacity Crankcase Capacity...

  • Page 9: Electrical System

    Specifications MODEL ELECTRICAL SYSTEM Battery Charging System Charging Output System Polarity Ignition Starter Interlock Switch Circuit Breaker TRANSMISSION Manufacturer/Model Steering Forward Speed Control Service Brake Parking Brake Neutral Final Drive Transmission Fluid Factory Service Alternate Transmission Fluid Transmission Fluid Capacity Transmission Cooling Ground Travel Speed Forward m.p.h.

  • Page 10: Blade Drive

    Specifications MODEL BLADE DRIVE PTO Shaft Blade Spindle Blade Drive Clutch and Brake Max. Blade Speed [22 in. (56 cm) Blade] @ 3600 RPM Engine TIRE SIZE Deck Caster Wheel Deck Caster Wheel (Optional) Drive Rear (Dual) TIRE PRESSURE Deck Caster Wheel Drive Rear DIMENSIONS (Tractor and Mower)*...

  • Page 11: Curb Weight

    660 lb (299 kg) 785 lb (356 kg) 990 lb (449 kg) Walker P/N 8230 Gates 3VX375 (or Walker P/N 6250) Walker P/N 7248 Gates 3VX280 (or Walker P/N 7234-1) 4 x 10 x 1/4 in. (10 x 25 x 1 cm)

  • Page 12: Seat

    Specifications MODEL GHS SYSTEM (Optional) (continued) Full Signal (Grass-Pak ® Powerfil SEAT FRAME/BODY CONSTRUCTION Frame Body Deck GHS Catcher and Chutes NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time without notice or obligation. AIR COOLED MT (20.0 HP) MTEFI (26.0 HP)

  • Page 13: Component Identification

    Component Identification Catcher Door Safety Latch Anti-Scuff Roller Catcher Lift / Dump Handle Fuel Tank and Cap Counterweight Spring and Protective Cover Transmission Control Rod Adjustment Nut (RH) Deck Lift Handle (Cutting Height Adjustment) Deck Support Arms Turbine Precleaner Grass Handling System 9.5 Bushel Catcher (Optional) 7.0 Bushel Catcher Standard Tilt-Up...
  • Page 14 Component Identification Removable Grass Catcher Door Catcher Screen Gas Spring (Not Visible) Catcher Exhaust Deflector Gas Spring Cover Catcher Lift / Dump Handle Instrument Panel Guard Catcher Door Instrument Panel Box (Shock Mounted) Dump Plate Catcher Door Handle Tailpipe Muffler Anti-Scuff Filter Fuel...
  • Page 15 Component Identification Model MT Donaldson Air Cleaner Air Restriction Indicator Fuel Pickup Line Air Intake Hose Fuel Tank Precleaner Tube Jackshaft PTO Gearbox Dipstick Turbine Precleaner RH Transmission Lockout Lever 30 Amp Circuit Breaker Clutch Lever Positive (+) Battery Cable Negative (-) Battery Cable Air Intake...
  • Page 16 Component Identification Model MTL Donaldson Air Cleaner Low Idle Adjustment Screw Air Restriction Indicator Fuel Pickup Line Air Intake Hose Fuel Tank Precleaner Tube Fuel Air Cleaner Overflow Filter Cover Hose Air Intake Water Plenum Pump Top View (Engine Compartment) Model MTL Overflow Muffler Tank...
  • Page 17 Component Identification Model MTEFI Donaldson Air Cleaner Air Restriction Indicator Fuel Pickup Line Fuel Return Line Air Intake Hose Fuel Tank Precleaner Tube Top View (Engine Compartment) Model MTEFI Air Cleaner Cover Fuel Pump Fuel Line to Engine (High Pressure) Ignition Air Intake Coil...

  • Page 18: Safety Instructions

    Any person using procedures, tools, or control techniques not recommended by Walker Manufacturing must take full responsibility for safety. The Walker Rider Lawnmower has been designed with many safety features to protect the operator from personal harm or injury. However, it is necessary for the operator to use safe operating procedures at all times.

  • Page 19: Operating

    Safety Instructions Do not wear loose fitting clothing that could get caught in moving parts. Do not operate this machine while wearing shorts; always wear adequate protective clothing, including long pants. Wearing safety glasses, safety shoes, and a helmet is advisable and required by some local ordinances and insurance regulations.

  • Page 20: Maintenance

    Safety Instructions Watch for holes, rocks, and roots in the terrain and for other hidden hazards. When mowing tall grass, mow higher than desired to expose any hidden obstacles. Then, clean the area and mow to the desired height. 10. Avoid sudden starts or stops. Before backing the machine up, look to the rear to be sure no one is behind the machine.
  • Page 21 Safety Instructions To reduce fire hazards, keep the engine free of grass, leaves, excessive grease, and dirt. Keep all nuts, bolts, and screws tight to ensure the machine is in a safe, working condition. Check the blade mounting nuts frequently, mak- ing sure they are tight.

  • Page 22: Safety, Control And Instruction Decals

    Safety Instructions SAFETY, CONTROL, AND INSTRUCTION DECALS Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual. Adjacent to Blower Discharge Chute Each End of Mower Deck (5808 All Decks Except 52, 56, 74) through Body (5804)
  • Page 23 Safety Instructions SAFETY, CONTROL, AND INSTRUCTION DECALS Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual. Jackshaft Support Adjacent to Dipstick (7827) Deck Carrier Frame (8647)

  • Page 24: Assembly Instructions

    Assembly Instructions SETUP INSTRUCTIONS Walker Mowers are shipped partially assembled. After uncrating the tractor and mower deck, initial setup is required. NOTE: During the process of unpacking, any dam- aged or missing parts should be noted and reported to the delivering carrier immediately (put in writing within 15 days).

  • Page 25: Battery Charging

    Assembly Instructions DANGER Battery electrolyte is a poisonous and cor- rosive sulfuric acid solution. Avoid spillage and contact with skin, eyes, and clothing - causes severe burns. To prevent accidents, wear safety gog- gles and rubber gloves when working with electrolyte.

  • Page 26: Mower Deck Assembly

    Assembly Instructions WARNING Make sure the battery cap vents are open. Improper venting of the battery COULD cause a battery explosion. Battery Clamp Secured by Wing Nut(s) Battery Protector Plate in Place Battery Installation Mower Deck Assembly Deck Caster Wheels Installation Remove the bolt, nut, axle spacer tube, and spacer washers from each deck caster wheel fork.

  • Page 27: Deck Discharge Shield Installation

    Assembly Instructions Deck Discharge Shield Installation (Side Discharge Models Only) Attach the deck side discharge shield by positioning the shield hinge lug in front of the deck mount and fastening with two 3/8-16 x 1-1/4 in. bolts, 3/8-16 ESNA nuts, and 3/8 in. wave spring washers. The wave washers fit between the two hinging surfaces.
  • Page 28 Assembly Instructions Connect the mower deck PTO drive shaft assembly to the tractor with the splined quick disconnect coupler. This coupler simplifies shaft alignment and installation. Use the arrows on the shaft and tube to align and slide the PTO quick coupler onto the deck spline shaft.

  • Page 29: Deck Leveling

    Assembly Instructions Deck Leveling 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 to measure blade height. Refer to ADJUSTING CUTTING HEIGHT in Operating Instructions. NOTE: A block of wood cut 4 in.

  • Page 30: Preoperating Checklist

    Assembly Instructions PREOPERATING CHECKLIST Before operating the mower for the first time, and as a routine before daily operations, it is important to make sure the mower is properly prepared and ready for operation. The following is a list of items to be checked.
  • Page 31 Assembly Instructions CHECK ENGINE COOLING SYSTEM - Model Check the radiator air intake screen to make sure the screen is clean and free of obstruction. Also, the radiator cooling fins should be inspect- ed and cleaned if there is any buildup of dirt or debris.
  • Page 32 Assembly Instructions CHECK MOWER BLADE CONDITION, SHARP- NESS, AND SECURITY OF MOUNTING The blade mounting nut should be tightened to 60 ft-lb (81.3 N m). If blade sharpening is required, refer to CHECKING/SERVICING for Sharpen Mower Blades in Maintenance Instructions. ADJUST MOWER CUTTING HEIGHT, IF RE- QUIRED Position the hitch pins in the four deck support pins.

  • Page 33: Operating Instructions

    Operating Instructions CONTROL IDENTIFICATION, LOCATION, AND FUNCTION Operating Controls CAUTION Before operating the mower, become fa- miliar with the location and function of all operator controls. Knowing the location, function, and operation of these controls is important for safe and efficient opera- tion of the mower.

  • Page 34: Engine Throttle

    Operating Instructions Choke Choke and Throttle Location (MT and MTL) Engine Throttle The throttle control lever (red knob) is located on the left side of the seat and is used to control engine speed. Moving the lever forward toward the FAST position increases engine speed;...
  • Page 35 Operating Instructions The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers LEFT WHEEL STEERING LEVER Forward Position (No Control Change) Neutral-Park Position Reverse Drive Wheel Motion Position MTEFI Fast Throttle Position Idle Position THROTTLE ON Position OFF Position CHOKE (MT &...

  • Page 36: Front Body Latch Release

    Operating Instructions Front Body Latch Release The front portion of the tractor body hinges forward for maintenance access and is latched down in the OPERATING position. To raise the body, move the latch release forward. Front Body Latch Release Front Body Latch Release Transmission Lockout Levers The transmission lockout levers disengage the hy- drostatic transmissons.

  • Page 37: Instrument Panel

    Operating Instructions Instrument Panel This illustration shows the configuration of the switches and indicators located on the instrument panel. Voltmeter Hourmeter Light Switch (Optional) MTEFI 7 AMP Circuit Breaker Water Voltmeter Temperature Gauge Light Switch Hourmeter (Optional) Oil Pressure Over Temperature Warning Light Warning Light 7 AMP...

  • Page 38: Hourmeter

    Operating Instructions Hourmeter The hourmeter displays operating time accumu- lated while the ignition switch is in the ON position. Voltmeter The voltmeter displays battery and charging system voltage. An indication of low or high voltage (the red area) indicates an electrical system failure. The cause of the failure should be determined and cor- rected.

  • Page 39: Ignition Switch

    Operating Instructions Ignition Switch The ignition switch is used to start and stop the en- gine. The switch has three positions: “O” is the OFF position, RUN is the position the key returns to after starting, and “S” is the START position. When start- ing the engine, turn the key clockwise to the “S”...

  • Page 40: Starting The Engine

    60 second cool-down period between starting attempts. Failure to follow these guidelines can damage the starter motor and shorten battery life. Consult your Walker dealer or Authorized Kohler dealer for additional help. After the engine starts, make sure the oil pres- sure light goes off.

  • Page 41: Adjusting Ground Speed And Steering

    Control setting until familiar with all operat- ing characteristics. Remember it is not necessary to hold the steering levers forward (a unique Walker feature); always PULL on the levers for steering or for reverse motion of the mower. Learn to operate the mower with your left hand on the steering levers and right hand on Forward Speed Control.

  • Page 42: Engaging The Mower

    Operating Instructions Forward Speed Control (FSC) Correct Operator Hand Position on the Controls Reverse direction of the mower by pulling both levers backward. NOTE: Smooth action on the steering levers will produce smooth mower operation. Remem- ber to keep the engine and ground speed slow until learning the control response.

  • Page 43: Stopping The Machine

    Operating Instructions Engaged Position Blade Clutch Engaged Disengaged Position Blade Clutch Disengaged STOPPING THE MACHINE Slow the engine to a fast idle; put the throttle in the 1/2 throttle position. Pull the steering levers to the NEUTRAL posi- tion and then move the FSC lever backward to the NEUTRAL-PARK position.

  • Page 44: Adjusting Cutting Height

    Operating Instructions ADJUSTING CUTTING HEIGHT WARNING The engine must be stopped before ad- justing cutting height. Disengage the blade clutch (PTO), stop the engine, and remove the ignition key. Wait for all move- ment to stop before getting off the seat. Cutting height is adjusted by positioning the four re- tainer hitch pins in a series of seven vertical holes on the deck support pins.

  • Page 45: Recommendations For Mowing

    Operating Instructions RECOMMENDATIONS FOR MOWING IMPORTANT: Operate the engine at full speed when mowing, to allow the engine to produce full horsepower and to increase efficiency of the engine cooling system. Keep the mower deck and discharge chute clean. Mow with sharp blades. A dull blade tears the grass (resulting in poor lawn appearance) and uses extra power (slowing the mowing speed).

  • Page 46: Recommendations For Tilt-Up Deck Operation/Transport

    Operating Instructions RECOMMENDATIONS FOR TILT-UP DECK OPERATION/TRANSPORT To avoid potential deck and/or tractor damage while using 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 back of the deck) and the GHS discharge chute may be damaged by moving the tractor.

  • Page 47: Grass Handling System (Ghs)

    Operating Instructions GRASS HANDLING SYSTEM (GHS) GHS Model Only Shear Pin PTO and Blade Gear Drive Shear Bolt Rear Discharge Mower Deck Catcher Door Safety Latch ® Grass-Pak Vane Switch ® Powerfil Drive Motor Actuator “Full” Signal Horn Catcher Delivery Chute Clutch Deck Discharge Chute...

  • Page 48: General Information

    Operating Instructions General Information The Grass Handling System (GHS) consists of a rear discharge mower deck connected to a 10 in. (25 cm) blower and a rear mounted grass catcher with 7.0 bushel (246 liters) capacity or optional 9.5 bushel (335 liters) capacity. The GHS blower oper- ates any time the mower blade clutch is engaged and moves grass through the rear discharge deck chute into the grass catcher.

  • Page 49: Clogging Checklist

    Operating Instructions Clogging Checklist In case of clogging, there will be a distinct change in the sound of the blower, i.e., the blower sound will stop. Also, the mower deck will begin to leave a trail of grass clippings. When this occurs, stop the engine, disconnect the spark plug wires, and make sure all movement has stopped before attempt- ing to unclog.

  • Page 50: Using The Tilt-Up Deck

    Operating Instructions Check that the openings in the removable air exhaust screen in the grass catcher are not plugged. If the screen is clogged, refer to Cleaning the GHS Exhaust Screen in this section. NOTE: An optional exhaust screen with larger holes (3/4 is available for use when mowing in wet grass;...

  • Page 51: Dumping The Catcher

    Operating Instructions Dumping the Catcher For dumping, the catcher either tailgate dumps into a disposal area or dumps into the optional dump bag. The dump bag is a reusable nylon fabric bag designed to conveniently move grass clippings from the catcher to a remote disposal area or container. Tailgate Dumping Open the back door by lifting on the door handle.

  • Page 52: Power Dump Option

    Operating Instructions Hook the bottom of the bag over the rear bumper while lifting on the handle strap(s). Tilt the catcher back to dump into the bag by lifting on the catcher lift handle on the lower front corner of the catcher with the one hand while continuing to hold up on the bag strap(s) with the other hand.
  • Page 53 Operating Instructions Cable Guide Power Dump Ram Actuator Door Actuator Grass Catcher Lift Channel Fork Dog Leg Assembly Rubber Bumper Power Dump Components Catcher Door Gas Spring Catcher Door Cable Rod Guide Cable Assembly Spring Actuator Mount Assembly...

  • Page 54: Maintenance Instructions

    Maintenance Instructions MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MT, MTEFI, MTL Service Item Check Engine Crankcase Oil Level Check/Clean Engine Air Cooling System* Check Coolant Level, Radiator/Overflow Tank MTL Clean Radiator Screen and Cooling Fins* MTL Check Security of Air Filtration Components Check Air Filter Restriction Gauge Clean Grass Buildup Under Deck Clean GHS Exhaust Screen*...

  • Page 55: Important Tips For Care Of The Kohler Engine

    On the Model MTEFI, the fuel system is pressur- ized. Do not attempt to service this fuel system. Con- tact your Walker dealer or authorized Kohler service dealer for work on the fuel system. Starting/Stopping For starting in cold weather [below 40°...

  • Page 56: Oil

    Maintenance Instructions Use only multi-viscosity oils as specified with the viscosity matching ambient temperatures for the en- gine operating conditions. This will aid starting in cold weather and assure proper lubrication in hot weather. Use only Kohler oil filters. Aftermarket filters may not seal properly and/or have the incorrect pressure relief valve for proper lubrication.

  • Page 57: Changing Engine Crankcase Oil/Oil Filter

    Maintenance Instructions Changing Engine Crankcase Oil/Oil Filter For Model MT and MTEFI, change the engine crank- case oil after every 100 hours of operation and re- place the oil filter every other oil change (every 200 hours of operation). For Model MTL, change the engine crankcase oil af- ter every 200 hours of operation and replace the oil filter at the same time.
  • Page 58 Maintenance Instructions Ident Location Deck Caster Wheel Fork Pivot Deck Caster Wheel Bearing Tee Gearbox, Deck Blade Drive Gearbox Universal Joint Shaft Assembly Grease Pivot Assembly, Tilt-Up Deck Deck Support Arm Socket Body Hinge Point FSC Actuator Rod Pivot Pins FSC Lever Pivot FSC Lever Fork (Grease Slide Area)
  • Page 59 Maintenance Instructions 20 & 36 30 & 35 Chassis and Deck Lubrication Points LUBRICATION...

  • Page 60: Mower Deck Gearbox Lubrication

    Maintenance Instructions Mower Deck Gearbox Lubrication NOTE: These instructions apply to all mower decks with gear-driven blades. Refer to DSD52 or DSD62 Mower Deck Lubrication in this section for the DSD52 or DSD62 deck with belt-driven blades. The mower deck gearboxes (tee gearbox and blade drive gearboxes) are connected as a unitized assem- bly, and oil flows freely between them.

  • Page 61: Tractor Pto Gearbox Lubrication

    Maintenance Instructions Check the oil level in the belt drive gearbox ev- ery 100 hours (or sooner if a visible oil leak has developed). With the deck in the normal oper- ating position, remove the level plug in the side of the gearcase.

  • Page 62: Hydrostatic Transmission Fluid

    Maintenance Instructions Hydrostatic Transmission Fluid Checking Hydrostatic Transmission Fluid Level Hydrostatic transmission fluid level should be checked every 25 hours of machine operation. It is preferable to check the fluid level when fluid is cold. Check fluid level as follows: Park the mower on a level surface.

  • Page 63: Cleaning

    Maintenance Instructions Reinstall the lower drain plug, making sure the rubber O-ring on the plug is in place and in good condition. Refill the transmission through the air bleed plug hole until it is as full as possible. IMPORTANT: Avoid fluid contamination when filling the reservoir.

  • Page 64: Turbine Precleaner

    -- a red flag will appear when the filter is overly restricting airflow into the engine. IMPORTANT: Use only Donaldson air filter ele- ments for replacement (Donaldson P822686 or Walker 5090-1). Aftermarket filters may not seal properly or filter efficiently. Cover Vacuator™ Valve Radialseal™...
  • Page 65 Maintenance Instructions Release the top and bottom cover latches and remove the air cleaner cover. Wash the cover and Vacuator™ valve. Check that these com- ponents are in good condition. The Vacuator™ valve is subject to wear and deterioration and should be replaced yearly or when damaged.

  • Page 66: Engine Cooling System - Mt20 And Mtefi

    Maintenance Instructions Engine Cooling System - MT20 and MTEFI Air Intake System To prevent engine overheating and possible engine damage, clean grass clippings, chaff, and dirt from the rotating engine air intake screen after every 8 hours of operation. In certain mowing conditions (dry grass, leaves, tree “cotton”, etc.), it may be nec- essary to check and clean the screen several times each day to prevent engine overheating.

  • Page 67: Flushing Radiator And Changing Coolant

    Maintenance Instructions Inspect the radiator cooling fins for material lodged in this area which would restrict cooling airflow. Use pressurized air or water to clean. DO NOT use any tool, like a screwdriver or knife, to clean material out of the fins as this may damage the cooling fins.

  • Page 68: Ghs Blower

    Maintenance Instructions NOTE: While some degree of material buildup in the mower deck housing can be tolerated, a point is finally reached where cutting quality deteriorates and clogging begins to occur because of too much buildup on the baffling and housing.

  • Page 69: Hydrostatic Transmission Cooling Fins

    Maintenance Instructions Hydrostatic Transmission Cooling Fins Keeping the cooling fins on the hydrostatic transmis- sions clean and free of obstruction is essential to avoid overheating the transmission fluid and short- ening transmission life. The cooling fins should be checked every 100 hours; and cleaned if necessary. To clean the fins, use compressed air and/or a pres- sure washer.

  • Page 70: Security Of Air Filtration Components

    Maintenance Instructions IMPORTANT: The coolant solution of antifreeze and distilled water must be thoroughly pre-mixed be- fore putting it in the engine (adding pure antifreeze into the radiator may cause damage to the engine by causing overheating). Security of Air Filtration Components NOTE: The following inspection is only an exter- nal inspection and should be done without “dis- turbing”...

  • Page 71: Cleaning The Terminals

    Maintenance Instructions Cleaning the Terminals If battery terminals are corroded, remove battery from the mower. Using a wire brush, remove corro- sion with a solution of one part baking soda and four parts water. Rinse with clean water. Coat the terminals with petroleum jelly or terminal protector spray to retard further corrosion.

  • Page 72: Drive Belts

    Maintenance Instructions WARNING DO NOT try to straighten a blade that is bent. NEVER weld a broken or cracked blade. ALWAYS replace with a new blade to assure safety. If the blade cutting edge is dull or nicked, it should be sharpened. sharpening 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 flat...

  • Page 73: Mower Deck Gearbox Oil Seals

    Fuel Lines and Clamps NOTE: The MTEFI system is pressurized and should be serviced by a Walker dealer or Authorized Kohler engine service outlet. Every year, inspect the fuel supply line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness.

  • Page 74: Replacing/Repairing

    Maintenance Instructions REPLACING/REPAIRING DANGER To prevent accidental starting of the en- gine when replacing parts or repairing the machine, remove the key from the ignition switch and disconnect the spark plug wires. IMPORTANT: ALWAYS use genuine factory re- placement parts. Substitute parts CAN result in product malfunction and possible injury to the oper- ator and/or others.

  • Page 75: Engine Pto Drive Belt

    Maintenance Instructions Engine PTO Drive Belt (3 Groove Power Band) To remove the engine PTO drive belt: Remove the jackshaft drive belt from its idler pulley (by pushing down on idler pul- ley) and let the belt drop down out of the way.

  • Page 76: Jackshaft Drive Belt

    Maintenance Instructions Jackshaft Drive Belt To remove the jackshaft drive belt: Remove the engine PTO drive belt, as described in previous section. Jackshaft Jackshaft Drive Belt Tension Spring Reverse the removal procedure to replace the jackshaft drive belt. Jackshaft Drive Belt Tension Spring Push Idler Pulley Down to Relax Belt Idler Pulley...

  • Page 77: Ghs Blower Drive Belt

    Maintenance Instructions GHS Blower Drive Belt Remove the GHS blower drive belt tension by depressing the idler pulley on the tightener arm. Roll the belt off the blower pulley and remove. GHS Blower Drive Belt Assembly (Disengaged) Reverse the procedure to install the GHS blow- er drive belt.

  • Page 78: Hydrostatic Ground Drive Belt

    Maintenance Instructions Hydrostatic Ground Drive Belt To remove the hydrostatic ground drive belt: Raise the spring-loaded belt tightener arm and idler pulley to relax belt. Reverse the procedure to install the hydrostatic ground drive belt. Belt Tightener Arm Idler Pulley Hydrostatic Ground Drive Belt Hydrostatic Ground Drive Belt Assembly (Disengaged)

  • Page 79: Fuel Filter - Model Mt And Mtl

    Because the MTEFI has a pressurized fuel system, fuel filter replacement should be done by a Walker dealer or authorized Kohler service dealer. Blade Overload Shear Bolts NOTE: Shear bolts are not used on the DSD52 or DSD62 mower deck.

  • Page 80: Pto Shear Pin

    U-Joint Shaft Assembly Cotter Pin PTO Shear Pin IMPORTANT: Use only Walker P/N 8067-13 shear pins for replacement to provide proper shock protection -- these pins are hardened to shear under a specific amount of load. Reinstall the PTO shaft guard.

  • Page 81: Mower Deck Gearbox Replacement

    Reinstall blades following CHECKING/SERVICING Blades instructions. If blades are replaced, always use Walker original equipment blades to ensure safety and optimum performance. The quality and performance of replacement blades offered by other manufacturers cannot be guaranteed, they could be dangerous.

  • Page 82: Ghs Blower Assembly

    Maintenance Instructions Mower Deck Gearboxes Connector Tubes Mower Deck Gearboxes (Shown with Gearbox Cover Removed for Clarity) GHS Blower Assembly (and/or Blower Wheel) GHS Blower Assembly Removal Remove the mower deck. Refer to Deck Instal- lation in Assembly Instructions and reverse the procedure to remove the deck.

  • Page 83: Blower Wheel Installation

    Maintenance Instructions Wheel Puller Hooked to Lugs on Bearing Housing Pressing Blower Wheel Out of Housing Bearing (3/4) Face Plate Intake Tube 3/8-16 x 1 Hex Bolt 3/8-16 Keps Nut Blower Wheel Installation To install the blower wheel, reverse the remov- al procedures.

  • Page 84: Adjustments

    PTO Switch. If any of the following conditions occur during start- ing or operating, a safety interlock switch may be malfunctioning. Contact you Walker dealer for trou- bleshooting and/or replacement. Slight adjustments can be made by carefully bend- ing the leaf switch up or down as needed.

  • Page 85: Blade Clutch (Pto)

    Maintenance Instructions Blade Clutch (PTO) Clutch Engagement/Belt Tension The clutch engagement and PTO belt tension are ad- justed using the clutch actuator rod. Initially, after in- stalling a new PTO belt, after 10 hours and every 100 hours thereafter, check and adjust for the two di- mensions in the clutch actuator rod as shown in the PTO Clutch Engaged and PTO Clutch Disen- gaged illustrations.

  • Page 86: Clutch Disengagement/Brake Action

    Maintenance Instructions Clutch Disengagement/Brake Action WARNING It is important to check and maintain blade brake action for safe operation of the machine. Blade Clutch Idler Pulley The declutched or disengaged position of the blade clutch idler pulley is adjustable and is set to give belt release without excessive slack and to apply the blade brake.

  • Page 87: Stop Block Eccentric Adjustment

    Maintenance Instructions Use the following procedures to check and adjust clutch disengagement and brake action: Stop Block Eccentric Adjustment - Step 1 Use the stop block attached to PTO belt tightener arm to set the bottom position of the clutch idler pul- ley in the disengaged position.

  • Page 88: Transmission Control

    Maintenance Instructions Stop Block PTO Belt Tightener Blade Brake Band Adjustment NOTE: The length of the actuator rod is adjusted by disconnecting the bottom clevis and shortening or lengthening accordingly. The standard pre-set length of the actuator rod is set at the factory at 8-1/4 in.

  • Page 89: Steering Lever End Play Adjustment

    Maintenance Instructions Tighten the jam nut on the forward travel stop adjusting bolt. Steering Lever Push Back on Actuator Actuator Arms Arm and Tighten Nut Forward Travel Stop Bolt Steering Adjustment Nut Forward Speed Control Stop and Steering Lever Adjustment Steering Lever End Play Adjustment - Step 2 Position the FSC lever to the most FORWARD position.

  • Page 90: Straight Ground Travel Adjustment

    Maintenance Instructions Straight Ground Travel Adjustment - Step 4 Sit in the seat, start the engine (operate at nor- mal speed), and with the FSC in the NEUTRAL- PARK position check for forward movement of either drive wheel (if either wheel moves back- ward, refer back to Neutral Function Adjust- ment - Step 3 and readjust).

  • Page 91: Tilt-Up Deck Adjustable Stop

    Maintenance Instructions 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 the engaged and disengaged positions freely. All four hitch pins used for height adjustment should sit flush on the washers above the deck pin bushing.

  • Page 92: Carburetor - Mtl

    Maintenance Instructions (May be Non-Adjustable) Idle Speed Screw Carburetor Adjustment DANGER The engine must be running to adjust the carburetor for engine idle. against injury, keep hands, feet, face, and other parts of body away from the muffler/ exhaust pipe, other hot parts of the engine, and moving or rotating parts of the engine.

  • Page 93: Ghs "Full" Signal Horn With Grass-Pak ® Switch

    Maintenance Instructions GHS “Full” Signal Horn with Grass-Pak If the GHS “full” signal horn is not sounding when the catcher is full, the following troubleshooting and ad- justment instructions apply: Check the horn. Disconnect the two wires from the Grass- ®...

  • Page 94: Electrical System

    Maintenance Instructions Bend Point Adjusting the Grass-Pak If adjustment is required, hold the Grass-Pak switch mount bracket firmly, grasp the switch and bracket and bend it down. Adjustments should be done in very small increments checking the measurement each time until the recommended measurement is achieved.

  • Page 95: Wiring Diagram - Model Mt

    INTERLOCK SWITCH CIRCUIT BREAKER BRN/WHT RELAY - B BLK/WHT ELECTRICAL SYSTEM WALKER MODEL MT Beginning S/N 2001- 49592 IGNITION SWITCH CIRCUITS G + M START B + A / S1 + S2 B + A RELAY - B S1 = START CIRCUIT...

  • Page 96: Wiring Diagram - Model Mtefi

    Maintenance Instructions Wiring Diagram - Model MTEFI WALKER MODEL MT-EFI Beginning S/N 2001-49448 IGNITION SWITCH CIRCUITS G + M B + A / S1 + S2 START B + A S1 = START CIRCUIT S2 = START / ACCESSORY CIRCUIT...
  • Page 97 Maintenance Instructions Wiring Diagram - Model MTEFI RED/ RED/ RED/WHT FUEL 10 AMP FUSE PUMP 20 AMP FUSE OPTIONAL LIGHT BRN/WHT NEUTRAL INTERLOCK SWITCH SEAT SWITCH RED/YEL INTERLOCK SWITCH CIRCUIT BREAKER BATTERY RED/YEL RELAY - C BLK/WHT POWERFIL GRASS PAK MOTOR SWITCH 30 AMP FUSE...

  • Page 98: Wiring Diagram - Model Mtl

    BLK/WHT ORG/WHT REVERSING MODULE BLK/WHT NEUTRAL INTERLOCK SWITCH BRN/WHT ELECTRICAL SYSTEM WALKER MODEL MTL Beginning S/N 2001-54652 IGNITION SWITCH CIRCUITS RELAY - A G + M PTO RELAY B + A / S1 + S2 START B + A START...

  • Page 99: Warranty

    HOW TO OBTAIN SERVICE UNDER THIS WARRANTY: Warranty service can be arranged by contacting the dealer where you purchased the mower or by contacting Walker Man- ufacturing Company, 5925 East Harmony Road, Ft. Collins, CO 80528. Proof of the date of purchase may be required to verify warranty coverage.
  • Page 100 General Condition: Temperature: Wind Speed: Humidity: OPERATOR Barometric Pressure: 24.9" HG (759 mm Hg) WALKER MFG. CO. 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 (970) 221-5614 FORM NO. 021404 0.8g Clear 50 (F) 10 (C) < 5 mph (< 8 kmh) 0.8g...

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