Related Manuals for Walker D21d
Summary of Contents for Walker D21d
- Page 1 Operator’s Manual Safety, Assembly, Operating, and Maintenance Instructions Please Read and Save These Instructions For Safety, Read All Safety and Operation Beginning S/N: 170133 Instructions Prior to Operating Machine P/N 7000-22...
- 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 customers. If for any reason this product does not perform to your expectations, please contact your local dealer.
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Page 3: Table Of Contents
D21d Table of Contents General Information Blade Clutch (PTO) ..........31 Parking Brake ............31 Highlighted Information ........1 Front Body Latch Release ........33 Glossary ...............1 Transmission Lockout Levers ........33 Identifying Number Locations ......1 Cold Start Lever (Jackshaft Drive Belt Release) ...33 Engine Serial Number Location ......2 Suspension Seat ...........34... - Page 4 Table of Contents D21d Maintenance Instructions Battery...............74 Cleaning the Terminals ..........74 Maintenance Schedule Chart ......58 Charging the Battery ..........75 Important Tips for Care of the Tire Pressure ............75 Kubota Engine ...........59 Wheel Bolt Torque .............75 Fuel System ..............59 Sharpen Mower Blades..........75 Starting/Stopping ............59...
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Page 5: General Information
Walker Mower dealer. There are several general practices to be aware of in the ● RIGHT HAND (RH) refers to the right-hand area of safety. -
Page 6: Engine Serial Number Location
Tractor Serial Number Location please contact our Service Department for assis- tance: Serial Number Walker Manufacturing Company 5925 E. Harmony Road Fort Collins, CO 80528 1-970-221-5614 www.walker.com Service manuals are available for each of these... -
Page 7: Specifications
Fuel Tank Capacity gal (L) 4.7 (17.8) Fuel Diesel Fuel 2-D Air Cleaner Remote Mounted Donaldson Radialseal (Walker P/N 5090-1 Primary/5090-3 Safety Filter) ELECTRICAL SYSTEM Battery 12 Volt, 350 CCA (Interstate SP-40) Charging System 40 Amp Automotive Alternator Charging Output... - Page 8 Parking Brake Mechanical Pin Lock in Transmission Gear Neutral Transmission Release by Manual Dump Valve Hydrostatic Transmission Oil Transmission Oil Filtration Walker Transmission Oil Performance System (TOPS Factory Service Mobil SHC 630, Walker P/N 6450-20 Transmission Filter Walker P/N 5024-13 Transmission Oil Capacity fl oz (L) 80 (2.4)
- Page 9 D21d Specifications DRIVE BELTS Engine PTO Walker P/N 7230 Jackshaft Drive Walker P/N 6238 Ground Drive, Micro-V Walker P/N 7248-1 Blower (GHS Model) Walker P/N 7234-2 SEAT Full Spring Suspension with Dampening and Adjustments for Back Angle, Lumbar Support, and Operator Weight. Standard with Ad- justable/Retractable Armrests.
- Page 10 Specifications D21d TOWING Towing Capacity lb (kg) 250 (113) if equipped with a factory installed or factory authorized tow hitch DIMENSIONS (Tractor and Mower) Length in. (cm) Tractor Only 64.5 (164) Tractor Wheel Base 41 (104) 77 (196) Tractor with Tilted Deck...
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Page 11: Component Identification
D21d Component Identification COMPONENT IDENTIFICATION NOTE: Operator Controls are identified in the sec- tion Operating Controls on page 30. Turbine Grass Handling System Precleaner 10.0 Bushel Catcher Tilt-Up Latch Spring Clip Counterweight Spring and Protective Cover Transmission Control Rod Adjustment Nut (LH) - Page 12 Component Identification D21d Removable Grass Catcher Screen (Not Visible) Catcher Door Gas Spring Gas Spring Cover (Not Visible) Catcher Door Radiator Cap Radiator Catcher Lift / Dump Handle Instrument Panel Guard Catcher Air Exhaust Instrument Panel Box (Shock Mounted) Dump Flap...
- Page 13 D21d Component Identification Air Cleaner Overflow Hose Muffler Cover Tailpipe Donaldson Air Cleaner Radiator Cap Air Filter Restriction Gauge Radiator Precleaner Tube Jackshaft Engine Dipstick PTO Gearbox (Not Visible) Dipstick Turbine GHS Blower Precleaner RH Hydrostatic Transmission RH Transmission Lockout Lever...
- Page 14 Component Identification D21d Oil Fill Water Temperature Exhaust Starter Motor Below Gauge Sender Manifold (Not Visible) Alternator Thermostat Housing and Thermostat Glow Plug(s) Fuel Pickup Water Pump Line Fan Motor Fuel Return Line Fuel Gauge Radiator Screen (Removable) Fuel Tank...
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Page 15: Safety Instructions
When you see the Safety Alert Symbol ( safety. read, understand, and follow the instructions. Fail- The Walker Rider Lawnmower has been designed ure to comply with safety instructions may result in with many safety features to protect the operator personal injury. - Page 16 Safety Instructions D21d Do not wear loose fitting clothing that could e. Replace the machine fuel cap and con- get caught in moving parts. Do not operate tainer cap securely and clean up any this machine while wearing shorts; always spilled fuel before starting the engine.
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Page 17: Operating
D21d Safety Instructions OPERATING Do not operate machine if the operator presence safety switch system is not work- Operate the mower only in daylight or in ing. Verify proper operation by having the good artificial light with good visibility of the operator lift off the seat with the engine run- area being mowed. - Page 18 Safety Instructions D21d 14. The maximum recommended slope operat- CAUTION ing angle is 15 degrees or 27% grade. When operating the machine on a slope, re- Use leg muscles and firm footing when lift- duce speed and use caution to start, stop, and ing the catcher to dump;...
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Page 19: Maintenance
Do not the fuel pump, fuel lines, and fuel injectors, wear jewelry or loose clothing. contact your Walker dealer or authorized Kubota service dealer. Always use the proper engine service man- ual when working on the engine. Unauthor-... -
Page 20: Safety, Control, And Instruction Decals
Safety Instructions D21d 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. - Page 21 D21d 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.
- Page 22 Safety Instructions D21d 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.
- Page 23 D21d 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.
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Page 24: Assembly Instructions
SETUP INSTRUCTIONS negative (-) battery terminal. ● Never start the engine when the cables Walker Mowers are shipped partially assembled to are loose or poorly connected to the our distribution network, and are typically assem- battery terminals. bled by the selling dealer. For any additional assembly besides the following, contact your Walk- ●... -
Page 25: Battery Installation
D21d Assembly Instructions Battery Installation Tighten the bolt and nut until the axle spacer tube and inner bearing race bottom against IMPORTANT: Make sure battery is securely the inside of the wheel fork (will not turn) while mounted in the frame. A loose battery may cause the wheel spins freely without binding. -
Page 26: Deck Discharge Deflector Shield Installation
Assembly Instructions D21d Deck Discharge Deflector Shield Installation Tilt-Up Roller Wheel Installation (Side Discharge Models Only) Mount the two (2) tilt-up roller wheels on the brack- ets on the rear skirt of the deck housing using the Attach the side discharge deflector shield using two (2) 3/8-16 x 1-1/4 in. - Page 27 D21d Assembly Instructions Internal Balls PTO Drive Deck Support Arms Locked on Shaft Shaft Carrier Frame Tube Sockets PTO Coupler Coupler Ring in U-Joint Locked Position Mower Deck Installation Quick Disconnect Ring “Locked” Position Engage the deck carrier frame tube sockets on the tractor support arms.
- Page 28 Assembly Instructions D21d To reduce the weight of lifting the deck before Counterweight the counterweight spring is installed, remove Spring Clip one (1) deck height hitch pin from a rear deck support pin or alternately lift and block one side of the deck. Decks with a deck height adjuster installed will need to use the lift and block technique.
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Page 29: Deck Leveling
D21d Assembly Instructions Deck Leveling WARNING The mower deck and support frame are jig welded; within normal tolerances, very little, if any, shim- The machine must be shut off during this ming should be required to level the deck. Tire procedure. -
Page 30: Ds60-3 Deck Leveling
Assembly Instructions D21d DS60-3 Deck Leveling than the front. If either set of measurements are not within tolerance, perform the Deck The mower deck and support frame are jig welded Leveling Procedure. and the deck support linkage is factory adjusted. -
Page 31: Preoperating Checklist
D21d Assembly Instructions Measure the side-to-side level of the deck by DANGER measuring from the ground to the top of the deck housing at the front corners of the deck Handle diesel fuel with care. Use safe refu- as shown in the DS60-3 Deck Leveling illus- eling procedures: tration. - Page 32 Assembly Instructions D21d ● Check the coolant levels in the radiator F CHECK SECURITY OF DRIVE WHEEL BOLTS and overflow tank. If additional coolant is The eight (8) lug bolts mounting the drive tires needed, refer to Engine Cooling System should each be torqued to 75 to 85 lb·ft (102...
- Page 33 D21d Assembly Instructions Tilt-Up Hook and Tilt-Up Handle Latch Connected Tilt-Up Tilt-Up Latch Hook Deck Lock Lever Deck Secured in TILT-UP Position CAUTION Do not operate machine with deck tilt-up pivot joint unlocked. DANGER Do not operate the mower with deck in tilt- up position.
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Page 34: Operating Instructions
Operating Instructions D21d Operating Instructions Engine Throttle The throttle control lever (red knob) is located on CONTROL IDENTIFICATION, LOCA- the left side of the seat and is used to control engine speed. Moving the lever forward toward TION, AND FUNCTION the FAST position increases engine speed;... -
Page 35: Forward Speed Control (Fsc)
D21d Operating Instructions Forward Speed Control (FSC) Parking Brake Forward Speed Control (FSC) has two functions: The parking brake functions by locking a pin into One is to set forward travel speed, and the other is the hydrostatic transmission pinion gear teeth. - Page 36 Operating Instructions D21d The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers FORWARD SPEED RIGHT WHEEL LEFT WHEEL CONTROL LEVER (FSC) STEERING LEVER STEERING LEVER Forward Position (No Control Change) Full Forward Ground Speed Position Neutral-Park...
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Page 37: Front Body Latch Release
D21d Operating Instructions Front Body Latch Release NOTE: The transmission plunger on the side of the transmission case (activated by the LOCKOUT The front portion of the tractor body hinges forward LEVER) must be completely released during oper- for maintenance access and is latched down in the ation of the mower, otherwise operation of the OPERATING position. -
Page 38: Suspension Seat
Suspension Seat CAUTION A fully adjustable suspension seat is standard on Model D21d. This seat is adjustable for back pitch, Before the tractor is used, the safety switch weight, lumbar support and armrest inclination. must be checked for proper function. The... - Page 39 D21d Operating Instructions For Backrest adjustment, moving the adjustment For adjusting the height of the armrest, pry out the handle upwards loosens the notching of the back- round cap (arrow) of the cover and loosen the rest adjustment. Refer to Figure 3.
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Page 40: Instrument Panel
Operating Instructions D21d Instrument Panel This illustration shows the configuration of the switches and indicators located on the instru- ment panel. Water Temperature Oil Pressure Water Temperature Ignition Gauge Warning Light Warning Light Switch Voltmeter Circuit Breaker - 7 Amp... -
Page 41: Hourmeter
D21d Operating Instructions Hourmeter Voltmeter The hourmeter, which is located on the instrument The voltmeter displays battery and charging sys- panel, displays operating time accumulated while tem voltage. An indication of low or high voltage the ignition switch is in the ON (RUN) position. -
Page 42: Water Temperature Warning Light/Horn
Operating Instructions D21d Water Temperature Warning Light/Horn The water temperature warning light and horn Glow Plug Preheat indicate that engine coolant temperature is above the safe operating limit and the engine is over- ON (RUN) heating. If this light comes on, there may be a problem with: ●... -
Page 43: Starting The Engine
Consult your Walker before operating the mower. DO NOT dis- dealer or authorized Kubota dealer for addi- connect safety switches;... -
Page 44: Adjusting Ground Speed And Steering
Operating Instructions D21d After the engine starts, make sure the oil pres- CAUTION sure light goes off. If not, stop the engine immediately and find the cause of the prob- An operator presence switch (seat switch) lem. Make sure the oil pressure light is off... - Page 45 ♦ Remember it is not necessary to hold the steering levers forward (a unique Walker feature); always PULL on the Forward Speed Control levers for steering or for reverse mo- (FSC) tion of the mower.
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Page 46: Engaging The Blade Drive
PARK position, the transmission control needs to be adjusted. Refer to Adjustments for Transmission Control in Neutral Function Adjustment - Step 4 on page 89 or contact Engaged your Walker dealer. Position WARNING Blade Clutch Engaged In case either of the transmission drive... -
Page 47: Stopping The Machine
(5) seconds, the brake should be adjusted or repaired before further opera- tion of the mower. Contact your Walker WARNING dealer, or refer to Clutch Disengagement/ Brake Action on page 91. -
Page 48: Adjusting Cutting Height
Operating Instructions D21d NOTE: The emergency stop procedure is Cutting height is adjusted from operator’s seat exactly the same procedure as used to nor- using the deck lift pedal to assist in raising the mally stop and park the machine. -
Page 49: Transmission Lockout
D21d Operating Instructions TRANSMISSION LOCKOUT Lockout Lever IMPORTANT: DO NOT TOW this mower with the transmission lockout engaged. Towing can pro- duce excessive internal pressure and damage the trans mission. To move the mower with the engine NOT running (dead battery, maintenance, etc.), the hydrostatic Cam in transmissions are unlocked (released). - Page 50 Operating Instructions D21d ● Keep the mower deck and discharge chute clean. Discharge Shield ● Mow with sharp blades. A dull blade tears the grass (resulting in poor lawn appearance) and uses extra power (slowing the mowing speed). ● It is preferable to cut grass when it is dry and not too tall.
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Page 51: Recommendations For Towing
D21d Operating Instructions 5 FT MINIMUM No Driving Zone RECOMMENDATIONS FOR TOWING The tractor body should never be tilted ● forward with the deck in the tilt-up position. When equipped with a factory installed hitch or This can cause the deck to unhook from the... -
Page 52: Grass Handling System (Ghs)
Operating Instructions D21d GRASS HANDLING SYSTEM (GHS) GHS Model Only Grass Catcher Exhaust Screen Grass-Pak ® (Removable) Vane Switch Catcher Door Spring (Not Visible) Catcher Air Exhaust Powerfil ® Drive Motor Actuator “Full” Signal Horn Catcher Door PTO Clutch PTO and Blade... -
Page 53: General Information
D21d Operating Instructions General Information NOTE: When a side discharge or mulching mow er deck is installed on the GHS model, a blower The Grass Handling System (GHS) consists of a intake cover should be installed in the blower rear discharge mower deck connected to a 10.5 in. -
Page 54: Clogging Checklist
Operating Instructions D21d Clogging Checklist Blades Must Operate at In case of clogging, there will be a distinct change Right Angles (90 Degrees) in the sound of the blower, i.e., the blower sound will stop. Also, the mower deck will begin to leave FORWARD a trail of grass clippings. -
Page 55: Using The Tilt-Up Deck
D21d Operating Instructions ● Check the interior of the chute connecting the “Full” Signal Horn mower deck to the blower for smoothness The GHS catcher has a “full” signal horn to alert and freedom from obstruction. the operator to dump the catcher when it is full Check the blower wheel for bent blades and ●... -
Page 56: Cleaning The Ghs Exhaust Screen
Operating Instructions D21d Cleaning the GHS Exhaust Screen CAUTION To remove the grass catcher screen for cleaning, open the catcher door, push forward and pull down Use leg muscles and firm footing when lift- on the grass catcher screen knobs (on either side ing the catcher to dump;... -
Page 57: Using The Dump Bag
D21d Operating Instructions Using the Dump Bag Open the back door by lifting on the door handle. Orient the dump bag with one of the handle straps on the bag opening facing up. Tailgate Door Handle Catcher Lift / Dump Handle... -
Page 58: Power Dump Option
Operating Instructions D21d Power Dump Option Hi-Dump Option ® When equipped with the optional power dump When equipped with the optional Hi-Dump sys- ® system, the operator dumps the catcher while tem, the operator raises and dumps the catcher sitting in the seat. A toggle switch operating a while sitting in the seat. - Page 59 D21d Operating Instructions NOTE: If grass tends to hang up in the catcher after raising the catcher with the Hi-Dump , “jiggle” ® the steering levers and make the tractor bounce a little to unstick the grass and make it slide out of the catcher.
- Page 60 Operating Instructions D21d Catcher Door Upper Catcher Door Gas Spring Grass Catcher Cable Guide Lift Channel Power Dump Lower Ram Actuator Door Arm Fork Actuator Cable Guide Cable Assembly Spring Actuator Mount Assembly Dog Leg Assembly Rubber Bumper Power Dump Components...
- Page 61 D21d Operating Instructions Catcher Door Upper Catcher Door Gas Spring Grass Catcher Cable Guide Lift Channel Gas Spring Assembly Lower Door Arm Actuator Cable Assembly Catcher Pivot Arm Control Lift Rod Dump Cylinder Control Lift Rod Hydraulic Hydraulic Valve Block...
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Page 62: Maintenance Instructions
Maintenance Instructions CAUTION Maintenance procedures requiring special training or MAINTENANCE SCHEDULE CHART tools should be performed by a trained technician. RECOMMENDED SERVICE INTERVALS - MODEL D21d Every Ref. Service Item Daily Hours Hours Hours Hours Yearly 2 Years Page Check Engine Crankcase Oil Level... -
Page 63: Important Tips For Care Of The Kubota Engine
Also, af termarket filters often skimp on ● Model D21d is equipped with an electric fuel the filtration media and require more frequent pump; therefore it is normally not necessary to replace ment (see following instructions). -
Page 64: Lubrication
Maintenance Instructions D21d Lubrication ● Use only Kubota oil filters. Aftermarket filters Remove the dipstick again and check the oil may not seal properly and/or have the incor- lev el on the dipstick. The oil level should be rect pressure relief valve for proper lubrication. - Page 65 D21d Maintenance Instructions Lubrication IMPORTANT: Use ONLY oil filters from the Before removing the dipstick and oil fill cap, clean the area around them to keep any dirt or engine manufacturer (Kubota HH150-32430). debris out of the engine. Aftermarket oil filters may not seal properly...
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Page 66: Mower Deck Gearbox Lubrication
Maintenance Instructions D21d Lubrication Mower Deck Gearbox Lubrication NOTE: In case the gearboxes are completely drained of oil, approximately 5 fl. oz. (15 cl) of NOTE: These instructions apply to all mower oil per gearbox is required to refill the gear decks with gear-driven blades. -
Page 67: Mower Deck Spindle Lubrication
D21d Maintenance Instructions Lubrication Changing Gearbox Oil Belt Drive The tractor PTO gearbox is oil filled. No scheduled Gearbox oil change is required. However, changing the oil af ter the first 100 hour break-in period will extend gearbox life and is recommended. -
Page 68: Hydrostatic Transmission Oil
Walker Dealer at the recommended intervals using only Walker approved oil and filters. Proof of Drain the oil from each transmission through meeting these service requirements must be sub-... -
Page 69: Grease Fitting And Oil Point Lubrication
3/4 turn. Do not over-tighten. NOTE: Use ONLY a Walker filter (P/N 5024- 13). Reconnect the lines between the oil pump and the transmissions at the elbow connectors. - Page 70 Maintenance Instructions D21d Lubrication Ident Lubrication Ident Lubrication Location Type Places Location Type Places Deck Caster Wheel Fork Pivot Grease Brake Band Pivot Pin (Clevis) Deck Caster Wheel Bearing Grease Belt Tightener Pivot, Grease Blade Spindle Grease PTO Clutch Δ...
- Page 71 D21d Maintenance Instructions Lubrication 29 & 38 Chassis and Deck Lubrication Points (DC42 Shown)
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Page 72: Cleaning
Maintenance Instructions D21d Cleaning CLEANING Turbine Precleaner The turbine precleaner is mounted on a remote air intake tube connected to the Donaldson air clean- CAUTION er. A spinning fan driven by the intake airflow separates dust from the air, giving the initial stage If a pressure washer is used on the ex- of air clean ing. -
Page 73: Donaldson Radialseal™ Air Cleaner
(Donaldson P822686 or cause for replacement. Walker 5090-1). Aftermarket filters may not seal properly or filter efficiently. Remove the filter element by pulling it out of the canister. There will be some initial resis- tance as the filter seal breaks loose and slides off of the outlet tube. -
Page 74: Engine Cooling System
Maintenance Instructions D21d Cleaning Check the condition and resilience of the radial Outlet Tube sealing surface (inside of the open end) of the Primary Filter Element filter. Replace the filter if any cracks, tears, or other damage to the sealing surface are not-... -
Page 75: Flushing Radiator And Changing Coolant
D21d Maintenance Instructions Cleaning Lift to remove the screen. To clean the IMPORTANT: Maintain proper coolant level in screen, wash with soapy water or blow out the radiator and coolant recovery tank. The cool- with compressed air. ant level should be maintained between FULL and LOW marks on the coolant recovery tank. -
Page 76: Ghs Blower
Maintenance Instructions D21d Cleaning Clean grass buildup underneath the deck Remove the GHS blower drive belt tension by using a pressure washer (and scraper if re- depressing the idler pulley on the tightener quired). arm. Roll the belt off the blower pulley. The... -
Page 77: Hydrostatic Transmission Cooling Fins
D21d Maintenance Instructions Cleaning Hydrostatic Transmission Cooling Fins CHECKING/SERVICING Keeping the cooling fins on the hydrostatic trans- missions clean and free of obstruction is essential DANGER to avoid overheating the transmission fluid and To prevent accidental starting of the en gine short ening transmission life. -
Page 78: Alternator Belt Tension
Maintenance Instructions D21d Checking and Servicing Battery Alternator Belt Tension Check and adjust the alternator belt tension to The battery comes sealed and is maintenance- avoid engine overheating and insufficient bat- free, so the electrolyte level will not need to be tery charging. -
Page 79: Charging The Battery
D21d Maintenance Instructions Checking and Servicing Charging the Battery NOTE: Keep blades sharp—cutting with dull blades not only yields a poor mowing job but slows the cutting speed of the mower and causes extra DANGER wear on the engine and blade drive by pulling hard. -
Page 80: Drive Belts
Maintenance Instructions D21d Checking and Servicing Mount the blade with wing tips pointing up into CAUTION the housing. For gear-driven decks reinstall the blade, washer, lock washer, and nut. ALWAYS wear eye protection and gloves Tighten the nut to 60 lb·ft (81 N·m). For when sharpening a blade. -
Page 81: Radiator Hoses And Clamps
If the brake system malfunctions— blades do not stop in five (5) seconds—adjust or repair the brake before operating the mower. Con- tact your Walker dealer for this service or refer to Adjustments for Clutch Disengagement/Brake Action on page 91. -
Page 82: Pto U-Joints
Forward Speed Control Friction Lock on page If any of the following conditions occur during starting or operating, a safety interlock switch may be malfunctioning. Contact your Walker dealer for troubleshooting and/or replacement. ● With or without an operator in the seat, the... -
Page 83: Replacing/Repairing
D21d Maintenance Instructions Replacing and Repairing REPLACING/REPAIRING Drive Belts There are five (5) individual belts on GHS mod- DANGER els or four (4) belts on SD models: To prevent accidental starting of the engine ● Jackshaft Drive Belt when replacing parts or repairing the ma- ●... -
Page 84: Engine Pto Drive Belt
Maintenance Instructions D21d Replacing and Repairing Engine PTO Drive Belt (3 Groove Power Band) Install the PTO drive belt by reversing the removal procedure. To remove the engine PTO drive belt: Refer to Blade Clutch (PTO) on page 91 to a. -
Page 85: Jackshaft Drive Belt
D21d Maintenance Instructions Replacing and Repairing Jackshaft Drive Belt b. Slide the idler arm release down to unlock the idler arm from the spring lever. Then To remove the jackshaft drive belt: pivot the arm up and away from the belt. -
Page 86: Ghs Blower Drive Belt
Maintenance Instructions D21d Replacing and Repairing 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. Blower Drive GHS Blower Pulley Drive Belt... -
Page 87: Hydrostatic Ground Drive Belt
D21d Maintenance Instructions Replacing and Repairing Hydrostatic Ground Drive Belt b. Slide belt off pulleys, then release the idler. To remove the hydrostatic ground drive belt: a. Push down on the spring-loaded belt tight- ener arm and idler pulley to relax belt. -
Page 88: Engine Alternator Belt
Maintenance Instructions D21d Replacing and Repairing Engine Alternator Belt b. Pivot the alternator as shown to relax and remove belt. To remove the alternator belt: a. Loosen the alternator mounting pivot bolt and the alternator bracket tensioner bolt. Alternator Bracket... -
Page 89: Deck Drive Belt (Optional Ds60-3 Deck)
D21d Maintenance Instructions Replacing and Repairing Deck Drive Belt (Optional DS60-3 Deck) To install the deck drive belt: To remove the deck drive belt: a. Install and route the belt as shown on the belt routing decal (located on the deck a. -
Page 90: Fuel Filter
D21d Replacing and Repairing Fuel Filter Blade Overload Shear Bolts Model D21d has two (2) fuel filters. Replace both NOTE: Blade shear bolts are not used on belt- the in-line filter and the Kubota filter element year- driven decks. ly or every 400 hours of operation. -
Page 91: Mower Blades
Sharpen Mower Blades on page 75. If blades ● An excessive amount of the flat section of the are replaced, always use Walker original equip- blade has been ground away (removed) when ment blades to ensure safety and optimum perfor- the blade is sharpened. -
Page 92: Adjustments
Maintenance Instructions D21d Adjustments ADJUSTMENTS Levers should sit parallel to each other Transmission Control The following instructions reflect the most current transmission linkage configuration with a spring/ dampener connected to the steering lever (starting S/N 11-109716) and the FSC using direct linkage instead of a sliding fork disconnect (starting S/N 15-134121). -
Page 93: Set Maximum Forward Travel Speed (Stop)
D21d Maintenance Instructions Adjustments Steering Lever Actuator Arms Forward Travel Stop Bolt Steering Adjustment Nut Transmission Forward Speed Control Stop and Control Arm Steering Lever Adjustment Tighten the jam nut on the forward travel stop Jam Nut Adjustment adjusting bolt. -
Page 94: Straight Ground Travel Adjustment
Maintenance Instructions D21d Adjustments Start the engine (operate first at idle and then At this point it may not be possible to adjust normal operating speeds) and check for both wheels stationary since the differential movement of the drive wheels. -
Page 95: Blade Clutch (Pto)
D21d Maintenance Instructions Adjustments Blade Clutch (PTO) Clutch Disengagement/Brake Action Clutch Engagement/Belt Tension WARNING The clutch engagement and PTO belt tension are It is important to check and maintain blade adjusted using the clutch actuator rod. Initially, brake action for safe operation of the ma- after installing a new PTO belt, after 10 hours and chine. -
Page 96: Forward Speed Control Friction Lock
Maintenance Instructions D21d Adjustments PTO Drive Engine Pulley Pulley Clutch Idler Pulley Actuator 1/2 in. Brake Band (13 mm) Adjustment Nut Friction PTO Clutch Disengagement Adjustment Washer b. Check both the brake band and brake drum on the drive pulley for wear. Replace... -
Page 97: Steering Handles
D21d Maintenance Instructions Adjustments Tilt-Up Deck Adjustable Stop* With the steering levers held back, move the FSC lever back from the FORWARD position. When the carrier frame hinge joint is properly With a proper amount of friction adjusted, the adjusted, the deck lock levers should move in and... -
Page 98: Ghs "Full" Signal Horn Adjustment
Maintenance Instructions D21d Adjustments GHS “Full” Signal Horn Adjustment Exhaust The vertical position of the Grass-Pak switch is ® Screen 4 to 4-1/2 in. critical to make sure the catcher box does not (10 to 11.5 cm) overfill causing the delivery chute to clog. The... - Page 99 (2) years* after the date of sale to the original retail purchaser unless the product is used for rental purposes, in which case this warranty is limited to ninety (90) days. At Walker’s request, customer will make the defective part available for inspection by Walker and/or return the defective part to Walker, transportation charges prepaid.
- Page 100 WALKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614 FORM NO. 121922 PRINTED IN USA www.walker.com ©2022 WALKER MFG. CO...