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Walker Rider Lawnmowers MB Owner's Manual

18 hp
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OWNER'S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
and ILLUSTRATED PARTS MANUAL
Model MB (18 HP)
™
Please Read and Save These Instructions
Effective Date: 09-01-06
For Safety, Read All Safety and Operation
P/N 4000-3
Instructions Prior to Operating Machine

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Summary of Contents for Walker Rider Lawnmowers MB

  • Page 1 OWNER’S MANUAL Safety, Assembly, Operating, and Maintenance Instructions and ILLUSTRATED PARTS MANUAL Model MB (18 HP) ™ Please Read and Save These Instructions Effective Date: 09-01-06 For Safety, Read All Safety and Operation P/N 4000-3 Instructions Prior to Operating Machine...
  • Page 2 This manual covers Model MB with the Briggs & Stratton Vanguard 18 HP gasoline engine. All shields and guards must be in place for the proper and safe operation of this machine.

  • Page 3: Table Of Contents

    Table of Contents ENGAGING THE MOWER ________________ 30 Owner’s Manual STOPPING THE MACHINE _______________ 31 ADJUSTING CUTTING HEIGHT ___________ 31 General Information ________________ 3 TRANSAXLE LOCKOUTS________________ 32 RECOMMENDATIONS FOR MOWING ______ 32 HIGHLIGHTED INFORMATION _____________ 3 RECOMMENDATIONS FOR TILT-UP DECK GLOSSARY ____________________________ 3 OPERATION/TRANSPORT _______________ 33 IDENTIFYING NUMBER LOCATIONS________ 3...
  • Page 4 Table of Contents REPLACING/REPAIRING ________________ 46 Drive Belts __________________________ 46 Engine/PTO Belt ____________________ 47 Ground Drive Belt ___________________ 48 Fuel Filter ___________________________ 49 Blade Overload Shear Bolts ____________ 49 PTO Shear Pin _______________________ 49 Mower Blades ________________________ 50 ADJUSTMENTS ________________________ 51 Transmission Control _________________ 51 Steering Lever Position Adjustment _____ 51 Steering Handles Adjustment __________ 51...

  • Page 5: General Information

    General Information • HIGHLIGHTED INFORMATION STEERING LEVERS steer the tractor by con- trolling the two transaxles. Walker Manufacturing recommends that any ser- • vice requiring special training or tools be performed TRACTOR is the prime mover, including the en- by an authorized Walker Mower Dealer. There are gine, drive train, operator seat, and controls to several general practices to be aware of in the area operate the mower.

  • Page 6: Engine Serial Number Location

    General Information Serial Number Tractor Serial Number Location Serial Number Engine Serial Number Location SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS The detailed servicing and repair of the engine, tran- Serial Number saxle and gearboxes are not covered in this manual. Only routine maintenance and general service instructions are provided.

  • Page 7: Specifications

    Specifications MODEL ENGINE Manufacturer/Model Briggs & Stratton Vanguard, 2 Cyl. OHV (Air-Cooled) Displacement 34.7 cu. in. (570 cc) HP (@ 3600 RPM) 18.0 3600 ± 100 Max. RPM (No Load) 3600 ± 100 Governed RPM ⋅ Max. Torque [ft-lb (N m) @ RPM] 29.5 (40.5) @ 2400 Idle RPM...
  • Page 8 Specifications MODEL TRANSMISSION (continued) Neutral Transmission Release by Manual Dump Valve Final Drive Direct Drive Axle from Transaxle Transmission Fluid Factory Service 20W50 Multi-Viscosity Motor Oil (Minimum SL Grade Oil) Transmission Fluid Capacity 79 fl oz (2336 ml) Transmission Cooling Cooling Fan Mounted on Drive Pulley Ground Travel Speed Forward m.p.h.
  • Page 9 Specifications MODEL DIMENSIONS (continued) 48 in. (122 cm) SD Model 53-3/4 in. (137 cm) (with Deflector) 56 in. (142 cm) SD Model 61-3/4 in. (157 cm) (with Deflector) Height 39 in. (99 cm) Wheel Base (Tractor) 38-1/2 in. (98 cm) Tread Width (Tractor) 29-3/4 in.

  • Page 10: Component Identification

    Component Identification NOTE: Control Identification shown in Operating Instructions section. Tilt-Up Latch Counterweight Spring and Protective Cover Deck Support Deck Support Pin and Height Adjustment Hitch Pins Forward Speed Control (FSC) Tilt-Up Friction Deck Handle Adjustment Deck Support Arm Deck Lift Handle Footrests (Cutting Height Adjustment) Tilt-Up...
  • Page 11 Component Identification Oil Fill Fuel Filter Oil Dipstick Tailpipe Fuel Pickup Line Muffler Cylinder Head Cooling Fins Fuel Tank Left Hand and Cap Drive Wheel Tailwheel Fork and Wheel Rear View and Left Side View...
  • Page 12 Component Identification Steering Levers Dampening Springs LH Transmission Control Arm RH Transmission Control Arm LH Transaxle RH Transaxle Expansion Expansion Reservoir Reservoir LH Transaxle RH Transaxle RH Transaxle LH Transaxle Lockout Rod Lockout Rod Parking Brake Linkage Positive (+) Battery Cable Parking Brake Negative (-) Battery Cable...

  • Page 13: Safety Instructions

    Safety Instructions Pay particular attention to any information labeled Walker Manufacturing cannot predict every poten- DANGER, WARNING, CAUTION, IMPORTANT, tially dangerous situation. Therefore, items labeled and NOTE in this manual. as such in this manual do not cover all conceivable situations.

  • Page 14: Operating

    Safety Instructions Do not wear loose fitting clothing that could get 12. The electrical system battery contains sulfuric caught in moving parts. Do not operate this acid. Avoid any contact with skin, eyes, and machine while wearing shorts; always wear clothing.

  • Page 15: Maintenance

    Safety Instructions Watch for holes, rocks, and roots in the terrain 16. In case of a clogged or plugged mower deck: and for other hidden hazards. When mowing Disengage the blade clutch (PTO) and turn tall grass, mow higher than desired to expose the engine off before leaving the seat.
  • Page 16 Safety Instructions If the engine must be running to perform a main- 11. Use care when charging the battery or per- tenance adjustment, keep hands, feet, and forming maintenance on the battery and clothing away from moving parts. Do not wear electrical system: jewelry or loose clothing.

  • Page 17: 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 Section. Each End of Mower Deck (5808) SD Deck Discharge Shield (5848) LH Fender (5802-2)
  • Page 18 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 Section. Hydrostat Oil Reservoir (4024-2) Blade Clutch on Front Body...

  • Page 19: Assembly Instructions

    Assembly Instructions SETUP INSTRUCTIONS Walker Mowers are shipped partially assembled to our distribution network, and are typically assembled by the selling dealer. For any additional assembly besides the following, contact your Walker dealer. Battery Service The battery is a completely sealed, non serviceable battery.

  • Page 20: Pto Shaft Guard Installation

    NOTE: A 2-1/2" diameter tilt-up roller wheel (P/N 9772) is required for decks installed on the Model MB tractor. Mount the two (2) tilt-up roller wheels on the brack- ets on the rear skirt of the deck housing using the P/N 8490 axle bolt, 3/8 in.
  • Page 21 Assembly Instructions Raise 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 Counter- Spring Tension Adjustment Nut weight Spring Installation photo.) Located Under Lower Spring Hook (not visible) With the counterweight springs connected, the...

  • Page 22: Deck Leveling

    Assembly Instructions Check the side-to-side level. Rotate each blade Deck Leveling sideways and measure the distance from blade Position mower on a smooth, level surface. Set tip to ground on each side. If measurements the cutting height to the highest position - 4 in. vary more than 1/8 in.

  • Page 23: 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 Body Rod checked.
  • Page 24 Assembly Instructions CHECK ENGINE COOLING SYSTEM DANGER Check that the engine cooling air intake screen is free of obstruction by grass clippings or debris and clean Handle gasoline with care. Gasoline is high- if required. Also, cylinder head cooling fins should be ly flammable and its vapors are explosive.
  • Page 25 Assembly Instructions CHECK MOWER BLADE CONDITION, SHARP- NESS, AND SECURITY OF MOUNTING The blade mounting nut should be tightened to 60 ft- lb (81.3 N ⋅ m). If blade sharpening is required, refer to CHECKING/SERVICING for Sharpen Mower Blades in Maintenance Instructions. ADJUST MOWER CUTTING HEIGHT, IF RE- QUIRED Position the hitch pins in the four deck support pins.

  • Page 26: Operating Instructions

    Operating Instructions CONTROL IDENTIFICATION, LOCATION, AND seconds. If the engine does not start, return the key FUNCTION to the “O” position for at least 60 seconds before making a restart attempt. Prolonged cranking can damage the starter motor and shorten battery life. CAUTION Release the key when the engine starts, and it will return to the RUN position.

  • Page 27: Engine Choke

    Operating Instructions Engine Choke Forward Speed Control (FSC) The choke control lever (black knob) is located on Forward Speed Control (FSC) has two functions: the left side of the seat. To start a cold engine, move One is to set forward travel speed, and the other is the choke control forward to the ON position.

  • Page 28: Parking Brake

    Operating Instructions Parking Brake Hourmeter The hourmeter, which is located on the right front of The parking brake functions by locking a detent arm the body, displays operating time accumulated into the transaxle outer control gear teeth. Moving while the ignition switch is in the ON position. the lever FORWARD engages the parking brake;...
  • Page 29 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...

  • Page 30: Starting The Engine

    Operating Instructions STARTING THE ENGINE IMPORTANT: DO NOT crank the engine con- tinuously for more than 10 seconds at a time. If the engine does not start, turn the key to the CAUTION OFF position and allow a 60 second cool-down period between starting attempts.
  • Page 31 Operating Instructions WARNING Beginning Recommendations are: ♦ Learn operation of the mower in an open In case either of the transmission drive area away from buildings, fences, and ob- belts break during operation, and if the structions. Learn operation on flat ground machine is on a slope, the machine will BEFORE operating on slopes.

  • Page 32: Engaging The Mower

    Operating Instructions Reverse direction of the mower by pulling both IMPORTANT: DO NOT engage the blade clutch levers backward. when transporting the mower across drives, side- walks, loose materials, etc. DO NOT engage the NOTE: Smooth action on the steering levers blade clutch with the PTO shaft disconnected will produce smooth mower operation.

  • Page 33: Stopping The Machine

    Operating Instructions Engage the parking brake. CAUTION IMPORTANT: The transaxles lock to prevent the mower from rolling freely with the engine If the cutting blades strike a stationary stopped. However, if the mower is parked on a object while mowing, stop the mower im- slope, it is necessary to ENGAGE the parking mediately, disconnect the spark plug BRAKE to prevent the mower from creeping.

  • Page 34: Transaxle Lockouts

    Operating Instructions TRANSAXLE LOCKOUTS IMPORTANT: DO NOT TOW this mower with the Hydro Lockout Rod transmission lockout engaged. Towing can produce excessive internal pressure and damage the transaxle. To move the mower with the engine NOT running (dead battery, maintenance, etc.), the transaxles are unlocked (released).

  • Page 35: Recommendations For Tilt-Up Deck Operation/Transport

    Operating Instructions • Make sure the mower is leveled properly for a smooth cut. Refer to Deck Leveling in Assembly Maximum Recommended Instructions . Side Slope - Do Not Operate on Steep Slopes • Use an alternating stripe mowing pattern for best appearance and vary the direction of the stripe each time the grass is mowed to avoid wear patterns in the grass.

  • Page 36: Maintenance Instructions

    Maintenance Instructions CAUTION Maintenance procedures requiring special training or tools should be performed by a trained technician. MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MB Ref. Service Item Daily Hours Hours Hours Hours Yearly Page Check Engine Crankcase Oil Level...

  • Page 37: Important Tips For Care Of The Briggs & Stratton Engine

    Maintenance Instructions BRIGGS & STRATTON TIPS IMPORTANT TIPS FOR CARE OF THE Air Cleaner BRIGGS & STRATTON ENGINE • Use only Briggs & Stratton air cleaner elements. Aftermarket elements may not seal in the air cleaner Fuel System housing, allowing dirt to enter the engine. Also, af- •...

  • Page 38: Lubrication

    Maintenance Instructions LUBRICATION LUBRICATION IMPORTANT: DO NOT operate engine without sufficient oil supply in the crankcase. DO NOT operate with oil level below the LOW mark or WARNING above the FULL mark on the dipstick. DO NOT attempt to lubricate the machine with the engine running.

  • Page 39: Grease Fitting And Oil Point Lubrication

    Maintenance Instructions LUBRICATION Remove the dipstick and oil drain plug, and drain Install the new oil filter on the engine. Turn the oil into a suitable container. Be sure to allow oil filter clockwise until the rubber gasket con- ample time for complete drainage. tacts the sealing surface, then tighten the filter an additional 1/2 to 3/4 turn.
  • Page 40 Maintenance Instructions LUBRICATION Ident Lubrication Ident Lubrication Location Type Places Location Type Places 372 %HOW 7LJKWHQHU 3LYRW *UHDVH 'HFN &DVWHU :KHHO )RUN 3LYRW *UHDVH 7KURWWOH &RQWURO &DEOH (QGV 'HFN &DVWHU :KHHO %HDULQJ *UHDVH (QJLQH  2LO )LOOHU 7HH *HDUER[ 'HFN &KRNH &RQWURO &DEOH (QGV %ODGH 'ULYH *HDUER[ &KRNH &RQWURO 3LYRW...
  • Page 41 Maintenance Instructions LUBRICATION 20 & 24 22 & 23 Chassis and Deck Lubrication Points...

  • Page 42: Mower Deck Gearbox Lubrication

    Maintenance Instructions LUBRICATION Mower Deck Gearbox Lubrication IMPORTANT: DO NOT overfill the deck gear- boxes. The gearbox assembly is not vented, The mower deck gearboxes (tee gearbox and blade and overfilling with oil will cause excessive pres- drive gearboxes) are connected as a unitized sure and result in oil leaks.

  • Page 43: Cleaning

    Maintenance Instructions LUBRICATION/CLEANING Drain Plugs Use 3/8" hex wrench Transaxle Drain Plugs to remove filter (view from underside of tractor) CLEANING Transaxle Oil Filter Location Engine Air Cooling System Reinstall drain plugs. To prevent engine overheating and possible engine Place 6” (15 cm) block under the left hand drive damage, clean grass clippings, chaff and dirt from wheel.

  • Page 44: Air Cleaner System

    Maintenance Instructions CLEANING NOTE: Washing the element in water or cleaning CAUTION solution is not recommended. Replace the element if it does not clean up with compressed air. Operating the engine with a blocked air in- • Use a bright light inside the element to inspect for take screen, dirty or plugged cooling fins, damage.

  • Page 45: Transaxle Cooling Fins

    CLEANING/ Maintenance Instructions CHECKING/SERVICING Raise the deck lock lever handle on each side of Transaxle Cooling Fins the carrier frame and pull out to release carrier Keeping the cooling fins on the transaxles clean and frame for tilting action. free of obstruction is essential to avoid overheat- Using the carrier frame lift handle, raise deck to transmission fluid...

  • Page 46: Security Of Air Cleaner System

    Maintenance Instructions CHECKING/SERVICING Security of Air Cleaner System Check the battery charge by measuring the specific gravity of electrolyte; if specific gravity is less than NOTE: The following inspection is only an external 1.225, the battery will need to be charged as follows: inspection and should be done without “disturb- •...

  • Page 47: Drive Belts

    Maintenance Instructions CHECKING/SERVICING Check the blades for straightness by marking Intersection Sharpen at Original the blade tip position inside the deck housing, Wear Area 30° Angle and then rotating the opposite end of the blade to the same position and comparing. If the dif- ference in blade tip track is more than 1/8 in.

  • Page 48: Spark Plugs

    CHECKING/SERVICING/ Maintenance Instructions REPLACING/REPAIRING Spark Plugs Check the function of the cutter blade brake by engaging the blade clutch (PTO), operating the Every 100 hours, remove the spark plugs, inspect, engine at full throttle, then disengaging the clutch clean, and reset the gap (or replace with a new and measuring how quickly the blades stop.

  • Page 49: Engine/Pto Belt

    Maintenance Instructions REPLACING/REPAIRING Engine/PTO Belt To remove the engine/PTO belt: Loosen and remove idler tension bolt and jam nut. Relax belt by depressing idler arm. Roll the belt off the pulley and remove the belt. Jam Nut Idler Arm Idler Tension Bolt Engine/PTO Belts...

  • Page 50: Ground Drive Belt

    Maintenance Instructions REPLACING/REPAIRING Ground Drive Belt Slide belt off pulleys, then release the To remove the ground drive belt: idler. Raise the spring-loaded idler to relax belt. RH Transaxle Ground Drive Belt LH Transaxle Drive Pulley Tension Spring Idler Pulley Hydro Idler Raise Idler Pulley to Relax Belt...

  • Page 51: Fuel Filter

    Blade Overload Shear Bolts The cutting blade is keyed to the blade hub by two Model MB is equipped with an in-line fuel filter. (2) shear bolts (10-24 x 5/8 in. stainless steel ma- Visually inspect the filter periodically, and replace chine screws).

  • Page 52: Mower Blades

    Maintenance Instructions REPLACING/REPAIRING • Rotate U-joint on shaft to align the shear pin hole Examine ends of the blade carefully, especially the with the hole (and shear pin fragment) in the intersection where the flat section of the blade turns shaft.

  • Page 53: Adjustments

    Maintenance Instructions ADJUSTMENTS ADJUSTMENTS Adjust the position of the RH lever by turning the stop bolt in the Speed Control Actuator in or out. Transmission Control Turning the stop bolt in will make the RH lever move back, and turning it out will make it move IMPORTANT: The proper adjustment of the transax- forward.

  • Page 54: Neutral Position Adjustment

    Maintenance Instructions ADJUSTMENTS Neutral Position Adjustment - Step 3 With the Forward Speed Control (FSC) in neu- tral, the lever should be straight up. Adjust by loosening the jam nuts on the FSC Rod and turn the rod to attain the straight up position. Tighten the jam nuts.

  • Page 55: Full Forward Speed Adjustment

    Maintenance Instructions ADJUSTMENTS One at a time adjust the left and right Control If travel is not straight, shorten the control rod of Rods to find the center of the neutral window. the slow side (adjust in 1/8 turn increments) to Shorten the rods until the drive tire turns forward match the faster side while maintaining the neu- then lengthen it until the drive tire turns in reverse...

  • Page 56: Neutral Switch Adjustment

    Maintenance Instructions ADJUSTMENTS Neutral Switch Adjustment - Step 6 With the steering levers held back, move the FSC lever back from the forward position. With Place the FSC in neutral position. Loosen the a proper amount of friction adjusted, the FSC le- bottom lock nut and adjust switch body up with ver should move back with a slight amount of re- top nut until the switch contacts open.

  • Page 57: Pto Belt Tension

    ADJUSTMENTS/ Maintenance Instructions ELECTRICAL SYSTEM PTO Belt Tension PTO belt tension can be adjusted by lengthening or shortening the position of the adjustment bolt on the idler adjuster (above idler pulley). Optimum adjust- ment will result in a 1/2 (1.27 cm) deflection of the belt.

  • Page 58: Tractor Decals

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  • Page 63: Body / Chassis Assembly

    0$,1 &20321(17 32:(5 75$160,66,21 Refer to Engine Group F020 3 4 F049 F024 F316 F004 F031 F024 F008 F421 F009 F127 F009 F336 F425 F012 F034 F034 F034 F029 F178 F009 F012 F034 F013 Refer to F012 Body / Chassis F009 F051 Assembly...
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  • Page 67: Main Component

    +<'5267$7,& *5281' '5,9( $66(0%/,(6 Refer to Engine Group Refer to F066 Main Component Power Transmission Group Refer to F009 Main Component Power Transmission Group F173 F009 F066 F171 F173 F169 F043 F277 F009 F005 F171 F169 F009 F013 F406 F005 F051 F012 F040...

  • Page 68: Steering Control Assemblies

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  • Page 69: Hydrostatic Ground

    67((5,1* &21752/ $66(0%/,(6 F093 F010 Refer to F183 Hydrostatic Ground F146 F427 Drive Assemblies F391 F008 F183 F183 F009 F059 F009 F386 F010 F373 F024 F093 F146 F024 F391 F008 F009 F183 F008 F235 F373 F167 F345 F009 F009 F004 Refer to F035 F009...

  • Page 70: Electrical Assembly

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  • Page 71 (/(&75,&$/ $66(0%/< Refer to Body/Chassis Assembly F349 Refer to Main Component Power Transmission F029 F026 F002 F004 F002 F004 F061 Refer to Body/Chassis F004 F374 Assembly F026 F374 F086 F002 F029 F028 F031 DETAIL A DETAIL B END VIEWS ARE SHOWN FROM BACK OF PLUG PUR/WHT RED/WHT PUR/WHT...
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  • Page 73 /,*+7 .,7  635($' 7$,/ :+((/ $;/( .,7 Refer to F091 Body/Chassis Assembly F052 F016 F009 F046 PUR/WHT F013 To Main Harness F423 F016 Refer to F377 Body / Chassis Assembly F344 F347 F348 F140 F218 F218 F140 F205 (IIHFWLYH 'DWH  8VH RQO\ JHQXLQH :DONHU UHSODFHPHQW SDUWV Š...

  • Page 74: Light Kit / Spread Tail Wheel Axle Kit 70 Wiring Schematic

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  • Page 75: Warranty

    LIMITED WARRANTY WALKER MODEL MB RIDER MOWER 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 purchaser unless the product is used for rental purposes, in which case this warranty is limited to ninety (90) days.
  • Page 76 Sound - Model MB Vibration - Model MB Sound Test Vibration Level Vibration levels at the operators handles were measured in the vertical, lateral, and Sound test conducted was in accordance 0.6g longitudinal directions using calibrated with 2000/14/EC and was performed on 31 vibration test equipment.

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