Summary of Contents for Walker Rider Lawnmowers MB (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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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.
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...
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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...
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.
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 &...
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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.
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...
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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...
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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...
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.
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.
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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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...
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)
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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...
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.
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.
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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.
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.
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.
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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.
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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-...
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.
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.
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.
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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...
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.
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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.
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.
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...
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).
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.
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 •...
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.
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.
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Maintenance Instructions Ident Location Lubrication Ident Type Places Δ LUBRICATION Lubrication Location Type Places Δ...
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;...
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.
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...
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.
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.
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...
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).
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.
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)
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.
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...
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.
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.
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).
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.
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.
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...
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.
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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.