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Walker MC (18 HP) Owner's Manual

18hp rider lawnmower
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OWNER'S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MC (18 HP)
(Covers Serial Numbers 03-61061 and on)
™
Please Read and Save These Instructions
Effective Date: 04-15-03
For Safety, Read All Safety and Operation
P/N 6000-8
Instructions Prior to Operating Machine
Price $5.00

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  • Page 1 OWNER’S MANUAL Safety, Assembly, Operating, and Maintenance Instructions Model MC (18 HP) (Covers Serial Numbers 03-61061 and on) ™ Please Read and Save These Instructions Effective Date: 04-15-03 For Safety, Read All Safety and Operation P/N 6000-8 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 HIGHLIGHTED INFORMATION _____________ 1 GLOSSARY ____________________________ 1 IDENTIFYING NUMBER LOCATIONS________ 1 ENGINE SERIAL NUMBER LOCATION ______ 2 SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS__________________________ 2 Specifications ________________________ 3 ENGINE________________________________ 3 ELECTRICAL SYSTEM ___________________ 3 TRANSMISSION_________________________ 3 BLADE DRIVE __________________________ 4 TIRE SIZE ______________________________ 4 TIRE PRESSURE ________________________ 4...
  • Page 4 Table of Contents Maintenance Instructions MAINTENACE SCHEDULE CHART ________ 41 IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE _______________ 42 Fuel System _________________________ 42 Starting/Stopping _____________________ 42 Cooling System ______________________ 42 Air Cleaner System ___________________ 42 Oil _________________________________ 42 LUBRICATION _________________________ 43 Engine Oil ___________________________ 43 Engine Break-In Oil __________________ 43 Checking Engine Crankcase Oil Level ___ 43...

  • Page 5: General Information

    Most accidents associated with the opera- tion or maintenance of a Walker Mower are caused by disregarding basic safety precautions or specific warnings. Such accidents, in most cases, can be prevented by being aware of the dangers present.

  • Page 6: Engine Serial Number Location

    Service manuals are available for each of these components from their respective manufacturers as follows: Kohler Engines Hydrostatic Transmissions Gearboxes (Deck) Serial Number Walker Manufacturing Company 5925 E. Harmony Road Fort Collins, CO 80528 1-970-221-5614 Kohler Company Kohler, WI 53044 Eaton Corporation 15151 Highway 5 Eden Prairie, MN 55344 Tecumseh Products Co.

  • Page 7: Specifications

    Specifications MODEL ENGINE Manufacturer/Model Displacement 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 Lubricant Fuel Tank Capacity Fuel Cooling System Capacity ELECTRICAL SYSTEM Battery Charging System...

  • Page 8: Blade Drive

    Specifications MODEL TRANSMISSION (continued) Transmission Fluid Factory Service Alternate Transmission Fluid Transmission Fluid Capacity Transmission Cooling Ground Travel Speed Forward m.p.h. (km/h) Reverse m.p.h. (km/h) 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...

  • Page 9: Mower Deck

    Counterweight Springs 645 lb (293 kg) 735 lb (334 kg) 775 lb (352 kg) 810 lb (368 kg) 860 lb (390 kg) 895 lb (406 kg) Walker P/N 8230 Gates 3VX395 (or Walker P/N 6251) Walker P/N 7248 Walker P/N 7234-1...

  • Page 10: Ghs System (Optional)

    Specifications MODEL GHS SYSTEM (Optional) Blower Blower Brake Max. Blower Speed Grass Catcher Capacity Optional Grass Catcher Capacity* Full Signal ® Powerfil SEAT FRAME/BODY CONSTRUCTION Frame Body Deck GHS Catcher and Chutes *Optional (9.5 Bushel) Grass Catcher adds approx. 5 lb (2 kg) and 5 in. (13 cm) in Height NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time without notice or obligation.

  • Page 11: Component Identification

    Component Identification Catcher Door Turbine Safety Latch Precleaner Anti-Scuff Roller Catcher Lift / Dump Handle Fuel Tank and Cap Transmission Control Rod Adjustment Nut (RH) Deck Support Arms Deck Lift Handle (Cutting Height Adjustment) Grass Handling System 9.5 Bushel Catcher Tilt-Up Latch Tilt-Up Hook...
  • Page 12 Component Identification Removable Grass Catcher Screen (Not Visible) Catcher Exhaust Catcher Door Deflector Gas Spring Catcher Door Gas Spring Protective Cover Catcher Lift / Dump Handle Catcher Door Catcher Door Handle Anti-Scuff Roller Muffler Oil Drain Tailpipe Left Hand Plug Drive Wheel Filter Tailwheel Fork...
  • Page 13 Component Identification Air Restriction Indicator (Not Visible) Rubber Bumper (Body Support) Fuel Pump Air Intake Hose Precleaner Tube Fuel Tank Cap Jackshaft PTO Gearbox Dipstick Turbine Precleaner RH Transmission Lockout Lever Clutch Lever 30 Amp Circuit Breaker Positive (+) Negative (-) Battery Cable Battery Cable Donaldson...

  • Page 14: 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 15: 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 16: 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 17 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 18: 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. Each End of Mower Deck (5808) Adjacent to Blower Discharge Chute through Body (5804)
  • Page 19 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. Top of Blower Housing (5819) Deck Gearbox Cover (5807-3) Jackshaft Support Adjacent...

  • Page 20: 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 21: Battery Charging

    Assembly Instructions After the battery is filled with electrolyte, replace the filler caps and charge the battery. Refer to Battery Charging. Battery Charging DANGER BATTERIES PRODUCE EXPLOSIVE GASES Charge the battery in a well-ventilated area, so that gases produced while charg- ing can dissipate.

  • Page 22: Deck Discharge Chute Installation

    Assembly Instructions Grease Fitting Locations Spacer Washer Axle Spacer Tube Deck Caster Wheel Installation NOTE: If semi-pneumatic wheels are installed, make sure the spacer washers fit over the spacer tube and are not caught between the fork and the end of the tube. The washers should move freely on the axle spacer tube.

  • Page 23: Mower Deck Lnstallation On Tractor

    Assembly Instructions Tilt-Up Spring and Roller Wheel Installation on Rear Discharge Deck Mower Deck lnstallation on Tractor Deck Installation Lightly grease each deck support arm (2) on the tractor. Refer to Mower Deck Installation pho- to on next page for location of deck support arm. Engage the deck carrier frame tube sockets on the tractor support arms (refer to Discharge Chute and PTO Shaft Guard Installation photo...
  • Page 24 Assembly Instructions Raise the mower body (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body. Lower the body to tension the springs. (Refer to Deck Counterweight Spring Installation Photo.) Arrows on Shaft and Tube (used to align when sliding together) Grease Deck Support Arms...

  • Page 25: 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 26: 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 27 Assembly Instructions CHECK GEAR AXLE OIL LEVEL Refer to Gear Axle Lubrication in Maintenance In- structions. INSPECT FOUR (4) DRIVE BELTS Engine PTO Drive, Jackshaft Drive, Hydrostatic Ground Drive, and GHS Blower Drive (if equipped). CHECK HYDROSTATIC TRANSMISSION OIL LEVEL Refer to LUBRICATION for Checking Hydrostatic Transmission Fluid Level in Maintenance Instruc- tions.

  • Page 28: Operating Instructions

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

  • Page 29: Engine Choke

    Operating Instructions Ignition Switch Engine Choke The choke control lever (black knob) is located on the left side of the seat. To start a cold engine, move the choke control forward to the ON position. After engine starts, move the choke control toward the OFF position, keeping enough choke to allow the engine to run smoothly as it warms up.

  • Page 30: Parking Brake

    Operating Instructions Parking Brake The parking brake functions by locking a pin into the hydrostatic transmission pinion gear teeth. Moving the lever FORWARD engages the parking brake; moving the lever BACKWARD releases the brake. IMPORTANT: Stop the tractor completely before engaging the parking brake.
  • Page 31 Operating Instructions The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers LEFT WHEEL RIGHT WHEEL FORWARD SPEED STEERING LEVER STEERING LEVER CONTROL LEVER (FSC) Full Forward Ground Speed Forward Position Position (No Control Change) Intermediate Neutral-Park Ground Speed Position Position...

  • Page 32: Starting The Engine

    Operating Instructions STARTING THE ENGINE CAUTION Before operating the mower, read and un- derstand all Safety Instructions and Operat- ing Instructions. WARNING NEVER run the engine in an enclosed or poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.
  • Page 33 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 34: 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 35: 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 36: Transmission Lockout

    Operating Instructions Cutting height is adjusted by positioning the four re- tainer hitch pins in a series of seven vertical holes on the deck support pins. Lift handles have been pro- vided on each end of the deck to assist in raising the deck while positioning the hitch pins.

  • Page 37: 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 38: 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 39: Grass Handling System (Ghs)

    Operating Instructions GRASS HANDLING SYSTEM (GHS) GHS Model Only Clutch 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 Delivery Chute Blower Deck...

  • Page 40: 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 6.7 bushel (238 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 41: 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 42: Using The Tilt-Up Deck

    Operating Instructions Remember, anything that restricts airflow or material flow along the entire path from the mower deck to the grass catcher can cause clogging. Using the Tilt-Up Deck Refer to CLEANING of Grass Buildup in Mower Housing in Maintenance Instructions. Using the GHS Catcher ®...

  • Page 43: 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 44 Operating Instructions Hook the bottom of the bag over the rear bumper while lifting on the handle strap. Tilt the catcher back to dump into the bag by lift- ing 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 with the other hand.

  • Page 45: Maintenance Instructions

    Maintenance Instructions MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MC Service Item Check Engine Crankcase Oil Level Check/Clean Engine Air Cooling System* Check Security of Air Filtration Components Check Air Filter Restriction Gauge Clean Grass Buildup Under Deck Clean GHS Exhaust Screen* Clean GHS Blower* Service Mower Blades...

  • Page 46: Important Tips For Care Of The Kohler Engine

    Maintenance Instructions 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 Start engine with the throttle advanced off idle (1/ 4 to 1/2 throttle).

  • Page 47: Lubrication

    Maintenance Instructions LUBRICATION WARNING DO NOT attempt to lubricate the machine with the engine running. Disengage the PTO clutch, shut off the machine, and re- move the ignition key. Proper lubrication is an important maintenance pro- cedure. It reduces wear and makes the machine qui- eter and easier to operate.

  • Page 48: Grease Fitting And Oil Point Lubrication

    Maintenance Instructions Park the mower on a level surface with the en- gine stopped. The engine oil should be warm before draining. If not warm from operation, start the engine and run a few minutes to warm the oil. Before removing the dipstick, clean the area around it to keep any dirt or debris out of the en- gine.

  • Page 49: Dsd52 Mower Deck Lubrication

    Maintenance Instructions The mower deck gearboxes (tee gearbox and blade drive gearboxes) are connected as a unitized assem- bly, and oil flows freely between them. The gearboxes are permanently lubricated (oil filled) and sealed re- quiring no scheduled lubrication. However, the gear- box oil seals should be checked every 25 hours for indication of an oil leak;...

  • Page 50: Tractor Pto Gearbox Lubrication

    Maintenance Instructions Lubricate the U-Joint in the drive shaft every 8 hours with SAE general purpose lithium or molybdenum base grease. Dolly Wheel Pivot U-Joint Gearbox, Dolly Wheel, and U-Joint Lubrication Tractor PTO Gearbox Lubrication Checking Gearbox Oil Level Check the gearbox oil level every 25 hours, and if necessary, add oil [SAE E.P.

  • Page 51: Changing Hydrostatic Transmission Fluid

    Maintenance Instructions Hot Level Cold Level Transmission Reservoir and Air Bleed Plug Location If the fluid is below the COLD mark (or the trans- mission is not performing properly), loosen the air bleed plug (located on the top of transmis- sion case next to the plastic reservoir).
  • Page 52 Maintenance Instructions Ident Location Deck Caster Wheel Fork Pivot Deck Caster Wheel Bearing Tee Gearbox, Deck Blade Drive Gearbox PTO Shaft Guard Hinge 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 53 Maintenance Instructions 31 & 38 32 & 37 Chassis and Deck Lubrication Points LUBRICATION...

  • Page 54: Cleaning

    Maintenance Instructions CLEANING Engine Air Cleaner System There are two main components in the engine air cleaner system: a turbine precleaner and a Donald- son Radialseal™ air cleaner. Each component is checked, cleaned and maintained on a different schedule based on the filtering action required. Each component is serviced as follows: Precleaner Tube Turbine Precleaner...

  • Page 55: Donaldson Radialseal™ Air Cleaner

    -- 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 Cover Latch Vacuator™...

  • Page 56: Engine Cooling System

    Maintenance Instructions Use a bright light inside the element to inspect for damage. Check the element very carefully for pin holes or other damage that will allow dirt to leak through the paper media. Replace element if necessary. Check the condition and resilience of the radial sealing surface (inside of the open end) of the filter.

  • Page 57: Cylinder Head Cooling Fins

    Maintenance Instructions Cylinder Head Cooling Fins It is essential for performance and longevity of the air-cooled engine to keep the cylinder head cooling fins clean and free of obstruction. After every 8 hours of operation, check the performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder head, and feeling the cooling airflow.

  • Page 58: Ghs Blower

    Maintenance Instructions DANGER Do not operate the mower with deck in tilt- up position. Do not move the tractor with the deck in the tilt-up position. Clean grass buildup underneath the deck using a pressure washer (and scraper if required). NOTE: While some degree of material buildup in the mower deck housing can be tolerated, a point is finally reached where cutting quality...

  • Page 59: Ghs Exhaust Screen

    Maintenance Instructions GHS Exhaust Screen Refer to Cleaning the GHS Exhaust Screen in Op- erating 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.

  • Page 60: Cleaning The Terminals

    Maintenance Instructions IMPORTANT: DO NOT overfill the battery. Electro- lyte will overflow through the vented caps onto parts of the machine and WILL result in severe corrosion. 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.

  • Page 61: 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 62: Mower Deck Gearbox Oil Seals

    Maintenance Instructions Mower Deck Gearbox Oil Seals The mower deck gearbox seals should be inspected every 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 the blade hub and seal protector plate on the housing, but is still vulnerable to seal damage due to operat- ing in an adverse environment.

  • Page 63: 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 64 Maintenance Instructions REPLACING/REPAIRING Jackshaft Drive Belt Engine PTO Belt GHS Blower Belt (GHS Model Only) Hydrostatic Ground Drive Belt Belt Locations...

  • Page 65: 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 66: 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 Reverse the removal procedure to replace the jackshaft drive belt. Jackshaft Jackshaft Drive Belt Tension Spring Push Idler Pulley Tension Spring...

  • Page 67: Ghs Blower Drive Belt

    Maintenance Instructions GHS Blower Drive Belt Remove the GHS blower drive belt by unhook- ing the belt tension spring from the hook on the chassis frame (located above the blower pul- ley). Lift the belt tightener idler pulley up and roll belt off the pulleys.

  • Page 68: 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 69: Fuel Filter

    Maintenance Instructions Fuel Filter Model MC is equipped with an in-line fuel filter. Vi- sually inspect the filter periodically, and replace the filter yearly. Fuel Filter Fuel Filter Location IMPORTANT: Replace the fuel filter only in a clean area where the fuel line and connections will not be contaminated by any dust and dirt.

  • Page 70: Pto Shear Pin

    Split Spring Pin Shaft Assembly Cotter Pin PTO Shear Pin IMPORTANT: Use only Walker P/N 8067-10 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 71: Mower Deck Gearbox Replacement

    Reinstall the blades following procedure from Sharp- en Mower Blades instructions. If blades are re- placed, 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 guar- anteed, they could be dangerous.

  • Page 72: 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 73: 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 74: Adjustments

    PTO Switch. If any of the following conditions occur during start- ing or operating, a safety interlock switch may be malfunctioning. Contact your 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 75: 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 76: 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 77: 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 78: 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 79: Steering Lever End Play Adjustment

    Maintenance Instructions Steering Lever Actuator Arms 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. Loosen the adjustment nut on each steering le- ver actuator until end play develops between the lever actuator and the adjustment nut (slid- ing on transmission control rod).

  • Page 80: 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 81: 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 82: Ghs "Full" Signal Horn With Grass-Pak® Switch

    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 83: Electrical System

    ADJUSTMENTS/ Maintenance Instructions ELECTRICAL SYSTEM ® Grass-Pak Vane Switch ® Checking the Grass-Pak Switch ELECTRICAL SYSTEM For troubleshooting, refer to Wiring Diagram. IMPORTANT: Disconnect both battery cables be- fore unplugging any wiring connectors or making re- pairs on the electrical system. Circuit Breakers A master circuit breaker is mounted on a bracket be- hind the battery.

  • Page 84: Wiring Diagram - Model Mc

    PRESSURE BREAKER LIGHT BLK/WHT OPTIONAL LIGHTS HOUR METER ELECTRICAL SYSTEM WALKER MODEL MC Beginning S/N 2001-49399 IGNITION SWITCH CIRCUITS G + M START B + A / S1 + S2 B + A S1 = START CIRCUIT RELAY - B...

  • Page 85: Operator's Notes

    Operator’s Notes...
  • Page 86 Operator’s Notes...

  • Page 87: Warranty

    WHAT THIS WARRANTY COVERS, AND FOR HOW LONG: Walker Manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty which is found to be defective in material and/or workmanship within one (1) year* after date of sale to the original retail pur- chaser unless the product is used for rental purposes, in which case this warranty is limited to ninety (90) days.

  • Page 88: Printed In Usa

    < 5 mph (< 8 kmh) OPERATOR Humidity: Barometric Pressure: 25.0" HG (636 mm Hg) WALKER MFG. CO. 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 (970) 221-5614 FORM NO. 041503 PRINTED IN USA 0.7g Tests were performed on 28 January 98 under the...

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