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Related Manuals for Walker MDD (20.9 HP)
Summary of Contents for Walker MDD (20.9 HP)
- Page 1 OWNER’S MANUAL Safety, Assembly, Operating, and Maintenance Instructions Model MDD (20.9 HP Diesel) ™ Please Read and Save These Instructions Effective Date: 12-01-03 For Safety, Read All Safety and Operation P/N 7000-6 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.
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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 MAINTENANCE SCHEDULE CHART _______ 46 IMPORTANT TIPS FOR CARE OF THE KUBOTA ENGINE _______________ 47 Fuel System _________________________ 47 Starting/Stopping _____________________ 47 Cooling System ______________________ 47 Air Cleaner System ___________________ 47 Oil _________________________________ 47 LUBRICATION _________________________ 48 Engine Oil ___________________________ 48 Engine Break-In Oil __________________ 48 Checking Engine Crankcase Oil Level ___ 48...
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Page 5: 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 6: Engine Serial Number Location
If you have any difficulty finding an authorized outlet or obtaining warranty service, please contact our Service Department for assis- tance: Walker Manufacturing Company 5925 E. Harmony Road Fort Collins, CO 80528 1-970-221-5614 Service manuals are available for each of these... -
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 (Approx.) Cooling Fan Coolant... -
Page 8: Blade Drive
Specifications MODEL TRANSMISSION (continued) 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. (km/h) Reverse m.p.h. (km/h) BLADE DRIVE PTO Shaft Blade Spindle Blade Drive Clutch and Brake Max. -
Page 9: Specifications
Specifications MODEL DIMENSIONS (Tractor and Mower)* Length Width Height Wheel Base (Tractor) Tread Width (Tractor) MOWER DECK Width of Cut SD/GHS Cutting Height Height Adjustment Blade Size (Typical) 42 in. (107 cm) SD 48 in. (122 cm) GHS Deck Suspension CURB WEIGHT (Approximate) SD Tractor Only GHS Tractor Only... -
Page 10: Drive Belts
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. Walker P/N 7230 Gates 3VX335 (P/N 6231) Walker P/N 7248 Gates 3VX280 (P/N 7234-1) 4 x 10 x 1/4 in. (10 x 25 x 1 cm) Three-Blade Paddle Wheel (Driven... -
Page 11: Component Identification
Component Identification Catcher Door 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) Turbine Grass Handling System 9.5 Bushel Catcher Tilt-Up Latch Tilt-Up Hook... - Page 12 Component Identification Catcher Lift / Dump Handle Instrument Panel Guard Instrument Panel Box (Shock Mounted) Left Hand Drive Wheel Catcher Door Gas Spring Protective Cover Catcher Door Gas Spring Radiator Cap Radiator Muffler and Radiator Tailpipe Guard Radiator Screen Rear View and Left Side View Removable Grass Catcher Screen (Not Visible)
- Page 13 Component Identification Air Cleaner Donaldson Air Cleaner Air Restriction Indicator (Not Visible) Precleaner Tube Jackshaft PTO Gearbox Dipstick Turbine Precleaner RH Transmission Lockout Lever 40 Amp Circuit Breaker Clutch Lever 30 Amp Circuit Breaker Positive (+) Battery Cable Negative (-) Battery Cable Muffler Cover...
- Page 14 Component Identification Starter Motor Below Exhaust Water Temperature Oil Fill (Not Visible) Manifold Gauge Sender Alternator Thermostat Housing and Thermostat Glow Plug(s) Water Pump Fuel Pickup Fan Motor Line Fuel Return Line Fuel Tank Radiator Screen (Removable) Radiator Fan and Shield Air Intake Throttle Control Injection...
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Page 15: 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 neces- sary for the operator to use safe operating proce- dures at all times. -
Page 16: 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 17 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.
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Page 18: Maintenance
Safety Instructions MAINTENANCE To prevent accidental starting of the engine when servicing or adjusting the machine, re- move the key from the ignition switch and dis- connect the electrical plug on the fuel shut-off solenoid. To reduce fire hazards, keep the engine free of grass, leaves, excessive grease, and dirt. -
Page 19: 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) through Body (5804) - Page 20 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 Gearbox Cover (5807-3)
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Page 21: 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 22: Battery Charging
Assembly Instructions Battery Charging DANGER BATTERIES PRODUCE EXPLOSIVE GASES Charge the battery in a well-ventilated area, so that gases produced while charg- ing can dissipate. Keep sparks, flames, and smoking mate- rials away from the battery at all times. Make sure the battery cap vents are open after the battery is filled with acid (check manifold vent on each cap). -
Page 23: Deck Discharge Chute Installation
Assembly Instructions Grease Fitting Locations Axle Spacer Tube Spacer Washer 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 24: 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 photo 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... - Page 25 Assembly Instructions Raise the front mower body (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body. Lower the front body to tension the springs. (Refer to Deck Counterweight Spring Instal- lation photo.) Grease Deck Support Arms...
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Page 26: 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 27: 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 28 Assembly Instructions CHECK HYDROSTATIC TRANSMISSION OIL LEVEL Refer to LUBRICATION for Checking Hydrostatic Transmission Fluid Level in Maintenance Instruc- tions. CHECK BATTERY ELECTROLYTE LEVEL Refer to CHECKING/SERVICING the Battery in Maintenance Instructions. CHECK FUNCTIONS OF INSTRUMENT PANEL AND WARNING HORN Turn the ignition key to the RUN position.
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Page 29: 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 30: Forward Speed Control (Fsc)
Operating Instructions Forward Speed Control (FSC) Forward Speed Control (FSC) has two functions: One is to set forward travel speed, and the other is to establish the NEUTRAL-PARK position. When the FSC lever is moved into the FORWARD posi- tion, a friction lock holds any forward speed setting from 0 to 5 mph (0 to 8 km/h). -
Page 31: Transmission Lockout Levers
Operating Instructions Transmission Lockout Levers The transmission lockout levers disengage the hy- drostatic transmissons. By lifting the lever on top of the transmission and locking it into place with the lockout cam, the hydrostatic transmissions are re- leased to permit freewheeling. By releasing the cam and lowering the lever, the transmissions are en- gaged for normal operation. - Page 32 Operating Instructions The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers FORWARD SPEED LEFT WHEEL RIGHT WHEEL CONTROL LEVER (FSC) STEERING LEVER STEERING LEVER Full Forward Forward Position Ground Speed (No Control Change) Position Intermediate Neutral-Park Ground Speed Position Position...
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Page 33: Instrument Panel
Operating Instructions Instrument Panel This illustration shows the configuration of the switches and indicators located on the instrument panel. Water Temperature Voltmeter Gauge Light Switch Hourmeter (Optional) Circuit Breaker - 10 Amp (Headlights, Safety Interlock Switch System, Fuel Solenoid Hold, ®... -
Page 34: Voltmeter
Operating Instructions 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. Water Temperature Gauge The water temperature gauge monitors engine cooling system temperature. -
Page 35: Light Switch (For Optional Lights)
Operating Instructions Light Switch (For Optional Lights) Operates headlights (when installed). Hourmeter The hourmeter displays operating time accumu- lated while the ignition switch is in the ON position. Circuit Breakers Two manual reset circuit breakers are located on the instrument panel. Each has a button that pops out if the circuit breaker trips. - Page 36 Operating Instructions Move the throttle 1/4 to 1/2 open (toward FAST) and turn the ignition switch to the START position to start the engine. Release the key to the RUN position as soon as the engine starts. IMPORTANT: If the engine fails to start after approximately 10 seconds of cranking, the engine should be checked before further crank- ing.
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Page 37: 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 38: 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 39: 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 position and then move the FSC lever backward to the NEUTRAL-PARK position. -
Page 40: 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 41: 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 42: 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 43: Grass Handling System (Ghs)
Operating Instructions GRASS HANDLING SYSTEM (GHS) GHS Model Only Clutch PTO and Blade Gear Drive Rear Discharge Mower Deck Catcher Door Safety Latch ® Powerfil Drive Motor Actuator “Full” Signal Horn Delivery Chute Deck Discharge Chute GHS Flow and Components Exhaust Screen (Removable) ®... -
Page 44: 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 45: 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 electrical plug on the fuel shut-off solenoid, and make sure all movement has stopped before attempting to unclog. -
Page 46: 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. Remember, anything that restricts airflow or material flow along the entire path from the mower deck to the grass catcher can cause clogging. -
Page 47: Dumping The Catcher
Operating Instructions Grass Catcher Screen Removal Knobs (Not Visible) Grass Catcher Screen Removal for Cleaning 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. -
Page 48: Power Dump Option
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 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 with the other hand. - Page 49 Operating Instructions Door Actuator Grass Catcher Catcher Door Gas Spring Cable Guide Lift Channel Rear Body Panel, RH Power Dump Ram Actuator Fork Catcher Door Cable Rod Guide Cable Assembly Rear Body Panel, LH Gas Spring Actuator Mount Assembly Dog Leg Assembly Rubber Bumper...
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Page 50: Maintenance Instructions
Maintenance Instructions MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MDD Service Item Check Engine Crankcase Oil Level Check Coolant Level in Radiator and Overflow Tank Clean Radiator Screen and Cooling Fins* Check Security of Air Filtration Components Check Air Filter Restriction Gauge Clean Grass Buildup Under Deck Clean GHS Exhaust Screen* Clean GHS Blower*... -
Page 51: Important Tips For Care Of The Kubota Engine
Maintenance Instructions IMPORTANT TIPS FOR CARE OF THE KUBOTA ENGINE Fuel System Fuel must be clean - free from water, dirt, and or- ganic material. Fuel contamination will greatly short- en the life of the fuel injection pump and injectors. Change fuel filters on a regular basis and when contamination is suspected or found in the fuel. -
Page 52: 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 quieter and easier to operate. -
Page 53: Grease Fitting And Oil Point Lubrication
Maintenance Instructions Drain Plug Oil Drain Location (view from left side of tractor) Before removing the oil filter, clean the area around the filter to keep dirt and debris out of the engine. Oil Filter Oil Filter Location Remove the old oil filter and wipe off the filter mounting surface on the engine. - Page 54 Maintenance Instructions Ident Location Deck Caster Wheel Fork Pivot Grease Blade Drive Gearbox Tee Gearbox, Deck Deck Caster Wheel Bearing 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...
- Page 55 Maintenance Instructions 28 & 38 Chassis and Deck Lubrication Points LUBRICATION...
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Page 56: 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 as- sembly, and oil flows freely between them. -
Page 57: 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 58: 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 59: 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 60: 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 61 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.
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Page 62: Engine Cooling System
Maintenance Instructions 10. Check the air intake hose for cuts, nicks, etc., and the hose clamps for tightness. 11. Reset the air restriction indicator (press button on bottom). Engine Cooling System Radiator Screen and Cooling Fins To prevent the engine from overheating and possi- ble engine damage, clean grass clippings, chaff, and dirt from the fine mesh radiator intake screen daily. -
Page 63: Ghs Blower
Maintenance Instructions Tilt-Up Latch Tilt-Up Latch Tilt-Up Hook on Deck Deck Lock Lever Deck Secured in TILT-UP Position 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). -
Page 64: Ghs Exhaust Screen
Maintenance Instructions Reinstall the GHS blower drive belt by reversing the removal procedure. Blower Drive Pulley GHS Blower Drive Belt Belt Tightener Idler Pulley Collapse Blower Belt Tightener to Remove GHS Blower Drive Belt GHS Exhaust Screen Refer to Cleaning the GHS Exhaust Screen in Op- erating Instructions. -
Page 65: Fan Belt Tension
Maintenance Instructions Check the coolant level in the coolant recovery tank and maintain the coolant level between the FULL and LOW marks on the recovery tank. When the engine is cold, the coolant level should be at or slightly above the LOW mark on the recovery tank. If the coolant level is low, remove the radiator cap and fill to the overflow port level and then fill the re- covery tank above the LOW mark. -
Page 66: Charging The Battery
Maintenance Instructions Charging the Battery Check the battery charge by measuring the specific gravity of electrolyte; if specific gravity is less than 1.225, the battery will need to be charged as follows: Charge the battery at 15 amps for 10 minutes. DO NOT exceed 20 amps maximum recom- mended charging rate. -
Page 67: Drive Belts
Maintenance Instructions NOTE: Blades can be sharpened with an elec- tric blade sharpener, conventional electric grind- er, or a hand file. CAUTION ALWAYS wear eye protection and gloves when sharpening a blade. Sharpen at Original 30° Angle 30° Do Not Grind or Sharpen on Underside Mower Blade Profile For Sharpening Check blade balance by positioning the blade... -
Page 68: Fuel Lines And Clamps
Maintenance Instructions Fuel Lines and Clamps Every year, inspect the fuel supply line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness. Good preventive maintenance calls for complete replacement of fuel lines and clamps every two (2) years. NOTE: This procedure is of special importance for the diesel engine due to poor performance when air is injected with the fuel. -
Page 69: Blade Brake Action
Maintenance Instructions Fuel Control Arm In Open (Run) Position Throttle Control Arm (Noted For Reference) Fuel Valve Open (Engine START and RUN Position) If the fuel valve solenoid is not operating properly, the problem may be isolated by first checking the operation of the solenoid as follows: Disconnect the fuel valve solenoid wire plug from the wire harness. - Page 70 Maintenance Instructions REPLACING/REPAIRING Jackshaft Drive Belt Engine Engine PTO Belt Fan Belt Hydrostatic Ground Drive Belt GHS Blower Belt (GHS Model Only) Belt Locations...
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Page 71: 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 cold start lever) and let the belt drop down out of the way. -
Page 72: Jackshaft Drive Belt
Maintenance Instructions Jackshaft Drive Belt To remove the jackshaft drive belt: Relax the belt by releasing spring tension from the jackshaft drive idler arm using the cold start lever. Jackshaft Pulley Reverse the removal procedure to replace the jackshaft drive belt. Jackshaft Pulley Jackshaft... -
Page 73: 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. The belt should be clear of the blower pulley, allowing free movement of the blower wheel. GHS Blower Drive Belt Assembly (Disengaged) Reverse the procedure to install the GHS blow- er drive belt and spring. -
Page 74: 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 Hydrostatic Ground Drive Belt Hydrostatic Ground Drive Belt Assembly (Disengaged) Belt Tightener Arm Hydrostatic... -
Page 75: Engine Fan Belt
Maintenance Instructions Engine Fan Belt To remove the fan belt: Loosen the alternator mounting pivot bolt and the alternator bracket tensioner bolt. Engine Fan Belt Crankshaft Pulley Reverse the procedure to install the belt. Ad- just and check the belt tension by referring to CHECKING/SERVICING the Fan Belt Tension in this section. -
Page 76: Fuel Filter
Maintenance Instructions Fuel Filter Model MDD has two (2) fuel filters. Replace both the in-line filter and the Kubota filter element every 400 hours of operation. In-Line Filter Cold Start Lever (For Reference) Fuel Filter Location IMPORTANT: Replace fuel filters only in a clean area where the fuel line and connections will not be contaminated by dust and dirt. -
Page 77: 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 78: Mower Deck Gearbox Replacement
Reinstall the blades following procedure from Sharpen Mower Blades instructions in CHECKING/ SERVICING in this section. 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 79: Ghs Blower Assembly
Maintenance Instructions 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. Skid Bar Mounting Bolts Blower Assembly Remove Skid Bar for GHS Blower Removal Remove the blower faceplate by removing six (6) 1/4-20 nuts. -
Page 80: Blower Wheel Installation
Maintenance Instructions Blower Wheel Installation To install the blower wheel, reverse the remov- al procedures. The front bearing is mounted on the blower wheel shaft, secured by a locking collar. Drive the locking collar clockwise with a punch, and tighten the set screw. Press blower wheel and front bearing into the blower housing. -
Page 81: 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 82: Blade Clutch (Pto)
Maintenance Instructions Blade Clutch (PTO) Clutch Disengagement/Brake Action WARNING It is important to check and maintain blade brake action for safe operation of the machine. 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 83: Transmission Control
Maintenance Instructions 2-1/8 in. (54 mm) Clutch Linkage Adjustment - Disengaged 1-3/4 to 1-7/8 in. (44 to 48 mm) Clutch Linkage Adjustment - Engaged Transmission Control IMPORTANT: The proper adjustment of the trans- mission control stops is essential for efficient oper- ation and life of the transmission. -
Page 84: Steering Lever End Play Adjustment
Maintenance Instructions 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 85: Forward Speed Control Friction Lock
Maintenance Instructions End Wrench on Adjustment Nut Straight Ground Travel Adjustment Forward Speed Control Friction Lock The FSC friction lock is adjusted to hold the select- ed forward speed when the steering levers are moved and yet the friction is not too heavy to make moving the control difficult (too much friction). -
Page 86: Ghs "Full" Signal Horn With Grass-Pak ® Switch
Maintenance Instructions IMPORTANT: The solenoid linkage should be checked and adjusted any time the solenoid is re- moved and replaced (either reinstalling an existing solenoid or installing a new replacement). Check and adjust the solenoid linkage as follows: Manually pull the fuel valve open and check the gap between the control arm on the injector pump and the stop. -
Page 87: Electrical System
Maintenance Instructions ELECTRICAL SYSTEM For troubleshooting, refer to Wiring Diagram. Circuit Breakers Location Master Circuit Breaker Mounted on Bracket Behind Battery Radiator Fan Circuit Breaker Mounted Adjacent to Master Circuit Breaker Instrument Panel Instrument Panel IMPORTANT: Disconnect both battery cables be- fore unplugging any wiring connectors or making re- pairs on the electrical system. -
Page 88: Wiring Diagram - Model Mdd
YEL/GRN 40 AMP NEUTRAL WARNING INTERLOCK HORN SWITCH ORG/GRN ELECTRICAL SYSTEM WALKER MODEL MDD Beginning S/N 2001-49370 IGNITION SWITCH CIRCUITS ALL OPEN GLOW PLUG 30 + 19 + AC START 30 + 17 + 50 + AC 30 + AC... -
Page 89: Maintenance And Service Record Sheet
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Page 90: Operator's Notes
Operator’s Notes... -
Page 91: 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 92 Wind Speed: < 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. 010104 Vibration - Model MDD 0.8g 0 (C)
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