Walker Rider Lawnmowers MB (18 HP) 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: 12-15-05
For Safety, Read All Safety and Operation
P/N 4000-2
Instructions Prior to Operating Machine

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Summary of Contents for Walker Rider Lawnmowers MB (18 HP)

  • 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: 12-15-05 For Safety, Read All Safety and Operation P/N 4000-2 Instructions Prior to Operating Machine...
  • 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 Owner’s Manual General Information ________________ 3 HIGHLIGHTED INFORMATION _____________ 3 GLOSSARY ____________________________ 3 IDENTIFYING NUMBER LOCATIONS________ 3 ENGINE SERIAL NUMBER LOCATION ______ 4 SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS ______________ 4 Specifications _______________________ 5 Component Identification Safety Instructions _________________ 11 BEFORE OPERATING ___________________ 11 OPERATING ___________________________ 12...
  • Page 4 Table of Contents ADJUSTMENTS ________________________ 51 Transmission Control _________________ 51 Steering Lever Position Adjustment _____ 51 Steering Handles Adjustment __________ 51 Neutral Position Adjustment ___________ 52 Full Forward Speed Adjustment ________ 53 Straight Tracking Adjustment __________ 53 Neutral Switch Adjustment ____________ 54 Forward Speed Control Friction Adjustment 54 Tilt-Up Deck Adjustable Stop ___________ 55 ELECTRICAL SYSTEM_________________ 55...
  • Page 5: General Information

    General Information HIGHLIGHTED 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- ation or maintenance of a Walker Mower are caused by disregarding basic safety precautions or specific warnings.
  • Page 6: Engine Serial Number Location

    General Information Serial Number Tractor Serial Number Location Serial Number Mower Deck Serial Number Location ENGINE SERIAL NUMBER LOCATION The Briggs & Stratton engine model, type, and code numbers are located on the left hand of the engine shroud. For the mower model covered by this man- ual, contact a Briggs &...
  • 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 ELECTRICAL SYSTEM Battery Charging System...
  • Page 8 Specifications MODEL TRANSMISSION (continued) Transmission Fluid Factory Service 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 Specifications MODEL DIMENSIONS (continued) Height Wheel Base (Tractor) Tread Width (Tractor) MOWER DECK Width of Cut Cutting Height Height Adjustment Blade Size 36 in. (91 cm) SD Model 42 in. (107 cm) SD Model 48 in. (122 cm) SD Model 56 in.
  • Page 10: Component Identification

    Component Identification NOTE: Control Identification shown in Operating Instructions section. Fuel Pickup Tilt-Up Latch Line Counterweight Spring and Protective Cover Fuel Tank and Cap Deck Support Deck Support Pin and Height Adjustment Hitch Pins Tilt-Up Forward Speed Deck Handle Control (FSC) Friction Adjustment Deck Support Arm...
  • Page 11 Component Identification Oil Fill Oil Dipstick Muffler Fuel Filter Cylinder Head Cooling Fins Tailpipe Left Hand Drive Wheel Electric Clutch Left Hand Transaxle PTO Belt Protective Cover Tailwheel Fork and Wheel Rear View and Left Side View...
  • Page 12 Component Identification LH Transmission Control Arm LH Transaxle Expansion Reservoir and Hose LH Transaxle LH Transaxle Lockout Rod Positive (+) Battery Cable Negative (-) Battery Cable Fuel Pump Fuel Filter Oil Fill Oil Dipstick Rubber Bumpers (Body Support) LH Tail Weight Steering Levers Dampening Springs RH Tail Weight...
  • Page 13: Safety Instructions

    Safety Instructions Pay particular attention to any information labeled DANGER, WARNING, CAUTION, IMPORTANT, and NOTE in this manual. When you see the Safety Alert Symbol ( read, understand, and follow the instructions. Fail- ure to comply with safety instructions may result in personal injury.
  • Page 14: 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 15: 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 16 Safety Instructions If the engine must be running to perform a main- tenance adjustment, keep hands, feet, and clothing away from moving parts. Do not wear jewelry or loose clothing. Always use the proper engine service manual when working on the engine. Unauthorized maintenance modifications to the engine may result in...
  • 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. Front Body Adjacent to LH Steering Lever (7818) Upper Guard...
  • 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

    Assembly Instructions PTO Shaft Guard Installation Position the shaft guard as shown and mount with two 1/4-20 x 1/2 in. bolts. Carrier Frame Tube Sockets PTO Shaft Guard Installation Tilt-Up Roller Wheel Installation NOTE: A 2-1/2" diameter tilt-up roller wheel (P/N 9772) is required for decks installed on the Model MB tractor.
  • Page 21 Assembly Instructions Spring Tension Adjustment Nut Located Under Lower Spring Hook (not visible) Counterweight Springs Clip Onto Body With Body Tilted Up Hitch Pins Lock Deck On Support Arms Deck Counterweight Spring Installation Raise mower body (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body.
  • Page 22: 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 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 checked.
  • Page 24 Assembly Instructions DANGER Handle gasoline with care. Gasoline is high- ly flammable and its vapors are explosive. Use safe refueling procedures: • DO NOT fill fuel tank with the engine run- ning. • If the engine is hot, allow to cool before refueling.
  • Page 25 Assembly Instructions Tilt-Up Latch 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. Do not move the tractor with the deck in the tilt-up position. CHECK MOWER BLADE CONDITION, SHARP- NESS, AND SECURITY OF MOUNTING The blade mounting nut should be tightened to 60 ft-...
  • Page 26: 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 location, function, and operation of these controls is important for safe and efficient opera- tion of the mower.
  • Page 27: Engine Choke

    Operating Instructions 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 choke control toward the OFF position, keeping enough choke to allow the engine to run smoothly as it warms up.
  • Page 28: Parking Brake

    Operating Instructions Parking Brake The parking brake functions by locking a detent arm into the transaxle outer control 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 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 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 31 Operating Instructions Beginning Recommendations are: ♦ Learn operation of the mower in an open area away from buildings, fences, and ob- structions. Learn operation on flat ground BEFORE operating on slopes. ♦ Start maneuvering the mower with SLOW engine speed and SLOW Forward Speed Control setting until familiar with all operat- ing characteristics.
  • Page 32: Engaging The Mower

    Operating Instructions 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. The FSC may be adjusted forward for faster ground speed and backward for slower ground speed.
  • Page 33: Stopping The Machine

    Operating Instructions STOPPING THE MACHINE Slow the engine to idle; put the throttle in the IDLE position. Pull the steering levers to the NEUTRAL-PARK position and then move the FSC lever backward to the NEUTRAL-PARK position. Disengage the blade clutch. IMPORTANT: DO NOT disengage the blade clutch with high engine speed (above 1/2 throttle) since the brake action on the blade drive...
  • Page 34: Transaxle Lockouts

    Operating Instructions TRANSAXLE LOCKOUTS IMPORTANT: DO NOT TOW this mower with the 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 Instructions . • 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 MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MB Service Item Check Engine Crankcase Oil Level Check/Clean Engine Air Cooling System* Clean Grass Buildup Under Deck Service Mower Blades Check Security of Air Cleaner System Lubricate Grease Fittings and Oil Points* Check Transaxle Fluid Check Tire Pressure Check Drive Belts (Engine, PTO, Ground Drive)
  • Page 37: Important Tips For Care Of The Briggs & Stratton Engine

    Maintenance Instructions IMPORTANT TIPS FOR CARE OF THE BRIGGS & STRATTON ENGINE Fuel System • Fuel must be clean - free from water, dirt, and or- ganic material. • Clean the fuel filter on a regular basis and when contamination is suspected or found in the fuel. Starting •...
  • Page 38: 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 39: Grease Fitting And Oil Point Lubrication

    Maintenance Instructions Remove the dipstick and oil drain plug, and drain oil into a suitable container. Be sure to allow ample time for complete drainage. Before removing the oil filter, clean the area around the filter to keep dirt and debris out of the engine.
  • Page 40 Maintenance Instructions Ident Location Lubrication Ident Type Places Δ LUBRICATION Lubrication Location Type Places Δ...
  • Page 41 Maintenance Instructions 21 & 24 18 & 23 Chassis and Deck Lubrication Points LUBRICATION...
  • Page 42: Mower Deck Gearbox Lubrication

    Maintenance Instructions Mower Deck Gearbox Lubrication The mower deck gearboxes (tee gearbox and blade drive gearboxes) are connected as a unitized assembly, and oil flows freely between them. The gearboxes are permanently lubricated (oil filled) and sealed requiring no scheduled lubrication. However, the gearbox oil seals should be checked every 25 hours for indication of an oil leak;...
  • Page 43: Cleaning

    Maintenance Instructions Use 3/8" hex wrench to remove filter Transaxle Oil Filter Location Reinstall drain plugs. Place 6” (15 cm) block under the left hand drive wheel. Remove the oil reservoir hose attached to the elbow on top of the transaxles and remove the elbows to access the oil fill openings.
  • Page 44: Air Cleaner System

    Maintenance Instructions CAUTION Operating the engine with a blocked air in- take screen, dirty or plugged cooling fins, and/or cooling shrouds removed will cause engine damage from overheating. Clean these areas of dirt and debris Clean Cooling Fins and Fan Air Cleaner System The engine is equipped with a paper air cleaner ele- ment with an oiled foam pre-cleaner which...
  • Page 45: Transaxle Cooling Fins

    Maintenance Instructions Raise the deck lock lever handle on each side of the carrier frame and pull out to release carrier frame for tilting action. Using the carrier frame lift handle, raise deck to the TILT-UP position and insert the deck hook into the tilt-up latch on the tractor body.
  • Page 46: Security Of Air Cleaner System

    Maintenance Instructions Security of Air Cleaner System NOTE: The following inspection is only an external inspection and should be done without “disturb- ing” the filtration components. On a daily basis, visually inspect the external condi- tion of the air cleaner cover. Check for damage.
  • Page 47: 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. Remove blades for sharpening by grasping the end of the blade using a rag or a thick, padded glove, while loos- ening and removing the nut, lock washer, and...
  • Page 48: Spark Plugs

    Maintenance Instructions Spark Plugs Every 100 hours, remove the spark plugs, inspect, clean, and reset the gap (or replace with a new plug). Clean spark plug with a wire brush. If the electrodes are burned short or pitted, replace the plug (refer to Specifications for the proper type of replacement plug).
  • Page 49: Engine/Pto Belt

    Maintenance Instructions Engine/PTO Belt To remove the engine/PTO belt: Remove belt guard from underneath muf- fler. Refer to Remove Belt Guard photo. Relax the belt by depressing the spring- loaded idler arm. Roll the belt off the pulley and remove the belt.
  • Page 50: Ground Drive Belt

    Maintenance Instructions Ground Drive Belt To remove the ground drive belt: Raise the spring-loaded idler to relax belt. LH Transaxle Idler Pulley Reverse the procedure to install the ground drive belt. LH Transaxle Idler Pulley Ground Drive Belt Hydro Idler Raise Idler Pulley to Relax Belt Ground Drive Belt Assembly (Disengaged)
  • Page 51: Fuel Filter

    Maintenance Instructions Fuel Filter Model MB is equipped with an in-line fuel filter. Visually inspect the filter periodically, and replace the filter yearly. In-Line 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 52: Mower Blades

    Maintenance Instructions Rotate U-joint on shaft to align the shear pin hole with the hole (and shear pin fragment) in the shaft. Use a punch to drive the remaining portion of the old shear pin out. Install new shear pin and secure with cotter pin. Set Screw Shear Pin Split Spring Pin...
  • Page 53: Adjustments

    Maintenance Instructions ADJUSTMENTS Transmission Control IMPORTANT: The proper adjustment of the transax- le control stops is essential for efficient operation and life of the transaxle. These stops are properly adjusted at the factory and should only require read- justment if the transaxle or related control linkage is removed or changed.
  • Page 54: Neutral Position Adjustment

    Maintenance Instructions Adjustment Slide Steering Lever Adjustment 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.
  • Page 55: Full Forward Speed Adjustment

    Maintenance Instructions Block the tractor up so the drive tires are off the ground. With the FSC in neutral, start the engine. (Op- erate first at idle and then normal operating speed) and check for movement of drive wheels. NOTE: If the engine will not start, check and ad- just the neutral safety switch (see adjustment below).
  • Page 56: Neutral Switch Adjustment

    Maintenance Instructions If the forward travel is straight throughout the speed range, except at maximum speed - place the FSC in full forward, turn the set screw in the Transmission Control Arm, of the faster side, in until it contacts the hydro stud. (Turning the set screw in slows the wheel.) Turn the set screw in an additional 1/8 turn.
  • Page 57: Tilt-Up Deck Adjustable Stop

    Maintenance Instructions Tilt-Up Deck Adjustable Stop When the carrier frame hinge joint is properly ad- justed, 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 58: Tractor Decals

    ITEM PART DESCRIPTION LOCATION REQ’D SD...
  • Page 59 Refer to Decks Parts Manual for Deck Decals...
  • Page 60: Body / Chassis Assembly

    ITEM PART DESCRIPTION ITEM PART DESCRIPTION REQ’D REQ’D...
  • Page 61 F009 F009 F029 F020 F341 F029 F093 F246 F004 F342 F342 F002 F004 F116 F002 F182 F172 F004 F004 F029 F034 F295 F009 F295 F227 F009 F025 F002 F009 F120 F004 F004 F127 F023 F034 F009 F005 F028 F034 F002 F037 F004 F029...
  • Page 62 ITEM PART DESCRIPTION ITEM PART DESCRIPTION REQ’D REQ’D...
  • Page 63 Refer to F012 Engine Group F013 F038 F038 F034 F013 F013 F153 F076 F009 F041 F051 F063 F151 F051 F042 F063 F012 F153 F171 F038 F038 Refer to Body / Chassis Assembly F387 F278 F042 F051...
  • Page 64: Engine Group

    ITEM PART DESCRIPTION ITEM PART DESCRIPTION REQ’D REQ’D...
  • Page 65 F184 F185 Refer to Hydrostatic Ground F050 Drive Assemblies F005 F164 F201 F002 F025 F050 F002 F009 F009 F004 F050 F316 F255 F185 F184 F050 F004 F392 F004 F032 F050 F179 F004 Refer to Body / Chassis Assembly F009 F009...
  • Page 66 ITEM PART DESCRIPTION ITEM PART DESCRIPTION REQ’D REQ’D...
  • Page 67 F029 F004 F005 F029 F004 F169 F009 F171 F169 F406 F005 F051 F040 F069 F406 F031 F069 F005 F004 F004 F069 F029 F111 F111 Refer to Engine Group F066 F067 F043 F067 F171 F013 F012 F054 F306 Refer to Body / Chassis Assembly F012 F069...
  • Page 68: Steering Control Assemblies

    ITEM PART DESCRIPTION ITEM PART DESCRIPTION REQ’D REQ’D...
  • Page 69 F093 F183 F009 F183 F183 F009 F386 F373 F024 F093 F024 F009 F183 F008 F373 F167 F345 F009 F035 F198 F385 F188 F005 F188 F198 F192 F008 F235 F009 F004 F009 F031 F024 F031 F373 F004 F009 F345 F008 F005 F407 F004 F004...
  • Page 70: Electrical Assembly

    ITEM PART DESCRIPTION ITEM PART DESCRIPTION REQ’D REQ’D...
  • Page 71: Main Component

    Refer to Body/Chassis Assembly F025 F002 F025 Refer to Hydrostatic Ground F349 Drive Assemblies END VIEWS ARE SHOWN FROM BACK OF PLUG DETAIL A DETAIL C DETAIL B RED/YEL PUR/WHT F034 F002 F004 F061 F374 F026 F374 F086 F002 F028 DETAIL D DETAIL E DETAIL F...
  • Page 72: Spread Tail Wheel Axle Kit

    ITEM PART DESCRIPTION  6SUHDG $[OH .LW :DONHU 635($' 7$,/ :+((/ $;/( .,7 ITEM PART REQ’D )DVWHQHUV DESCRIPTION REQ’D...
  • Page 73 Refer to Body / Chassis Assembly F016 F046 F013 F038 F278 F278 F038 F377 F348 F140 F218 F344 F347 F218 F140 F205...
  • Page 74: Wiring Schematic

    DU@H ÃQ6SU 9@T8SDQUDPI ÃIP ÃÃIP RED/WHT INTERLOCK Ã Ã I PÃ Ã Ã Ã Ã Ã Ã DU@H S@R·9 ÃIP ELECTRIC CLUTCH RED/YEL SEAT SWITCH PUR/ NEUTRAL SWITCH 15 AMP CIRCUIT BREAKER PUR/WHT CLUTCH SWITCH BRN/ RED/YEL RELAY - A BLU/RED Q6SU 9@T8SDQUDPI...
  • Page 75: 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 purchaser unless the product is used for commercial or rental purposes, in which case this warranty is limited to ninety (90) days.
  • Page 76 Sound - Model MB Sound Test Sound test conducted was in accordance with 2000/14/EC and was performed on 31 May 05 under the conditions listed: General Condition: Clear Temperature: 65 (F) Wind Speed: < 5 mph (< 8 kmh) OPERATOR Humidity: Barometric Pressure: 83.8 kPA WALKER MFG.

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