OWNER’S MANUAL Safety, Assembly, Operating, and Maintenance Instructions and ILLUSTRATED PARTS MANUAL Model MBV (18 HP) Model MBK (18 HP) ™ Please Read and Save These Instructions For Safety, Read All Safety and Operation Instructions Prior to Operating Machine Effective Date: 04-01-10 P/N 4000-4
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 us at (970) 221-5614. Every customer is important to us. Your satisfaction is our goal. Please. . .
Table of Contents Owner’s Manual Operating Instructions______________ 26 General Information_ ________________ 1 HIGHLIGHTED INFORMATION______________ GLOSSARY_ ____________________________ IDENTIFYING NUMBER LOCATIONS_________ ENGINE SERIAL NUMBER LOCATION________ Model MBV_ ___________________________ Model MBK_ ___________________________ SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS_ ______________ 1 1 1 2 2 2 2 Specifications_________________________ 3 Engine_________________________________ 3 ELEC
Table of Contents CLEANING_____________________________ Engine Air Cooling System______________ Cylinder Head Cooling Fins_ ____________ Engine Air Cleaner System_ _____________ Cummins/Fleetguard OptiAir™ Air Cleaner__________________________ Grass Buildup in Mower Housing_________ Transaxle Cooling Fins_ ________________ CHECKING/SERVICING___________________ Security of Air Cleaner System___________ Battery_______________________________ Cleaning the Terminals_________________ Charging the Battery________
General Information HIGHLIGHTED INFORMATION Walker Manufacturing recommends that any service 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 operation or maintenance of a Walker Mower are caused by disregarding basic safety precautions or specific warnings. Such accidents, in most cases, can be prevented by being aware of the dangers present.
General Information SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS Serial Number Mower Deck Serial Number Location ENGINE SERIAL NUMBER LOCATION Model MBV 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 manual, contact a Briggs & Stratton servicing dealer. The detailed servicing and repair of the engine, transaxle, and gearboxes are not covered in this manual.
Specifications MODEL MBV MBK Manufacturer/Model Briggs & Stratton Vanguard, 2 Cyl. OHV (Air-Cooled) Kohler Command, 2 Cyl. (Air-Cooled) Displacement 34.7 cu. in. (570 cc) 38.0 cu. in. (624 cc) HP (@ 3600 RPM) 18.0 18.0 Max. RPM (No Load) 3600 ± 100 3750 Governed RPM 3600 ± 100 3600 Max. Torque [ft-lb (N·m) @ RPM] 29.5 (40.0) @ 2400 32.2 (43.7) @ 2200 Idle RPM 1750 1200 ± 75 Spark Plug Type Champion® RC14YC Champion® RC12YC Spark Plug Gap .030 in. (0.75 mm) .030 in. (0.
Specifications MODEL MBV MBK Manufacturer/Model Dual, Independent Hydro-Gear® Integrated Transaxles Dual, Independent Hydro-Gear® Integrated Transaxles Steering Hand Lever Control / Individual Wheel Hand Lever Control / Individual Wheel Forward Speed Control Precision Friction Lock Lever, Cruise Control, with NeutralPark Position Precision Friction Lock Lever, Cruise Control, with NeutralPark Position Service Brake Mechanical Lockout for each Transmission (Single Lever Control) Mechanical Lock
Specifications MODEL MBV MBK Deck Caster Wheel 2.80/2.50-4 Pneumatic (4-Ply) 2.80/2.50-4 Pneumatic (4-Ply) Deck Caster Wheel (Optional) 8 x 3.00-4 Foamed Rubber 8 x 3.00-4 Foamed Rubber Drive 18 x 8.50-10 (4-Ply Low-Profile) 18 x 8.50-10 (4-Ply Low-Profile) Rear 11 x 4.00-5 11 x 4.00-5 Deck Caster Wheel 20 PSI (137 kPa) 20 PSI (137 kPa) Drive 15 PSI (103 kPa) 15 PSI (103 kPa) Rear 20 PSI (137 kPa) 20 PSI (137 kPa) 82 in. (208 cm) 82 in. (208 cm) 36 in.
Specifications MODEL MBV MBK 36 in. (91 cm) SD Model 20 in. (51 cm) Two (2) Clockwise-Rotating Blades with a 4 in. (10 cm) Center Overlap 20 in. (51 cm) Two (2) Clockwise-Rotating Blades with a 4 in. (10 cm) Center Overlap 42 in. (107 cm) SD Model 22 in. (56 cm) Two (2) Clockwise-Rotating Blades with a 2 in. (5 cm) Center Overlap 22 in. (56 cm) Two (2) Clockwise-Rotating Blades with a 2 in. (5 cm) Center Overlap 48 in. (122 cm) SD Model 25 in. (64 cm) Two (2) Clockwise-Rotating Blades with a 2 in.
Component Identification NOTE: Control Identification shown in Operating Instructions section.
Component Identification Oil Fill Fuel Pickup Line Tailpipe Muffler Cylinder Head Cooling Fins Left Hand Drive Wheel Fuel Tank and Cap Spread Tail Wheel Tailwheel Fork and Wheel NOTE: Model MBK Shown Rear View and Left Side View 8
Component Identification LH Transmission Control Arm Steering Lever Dampeners RH Transmission Control Arm LH Transaxle RH Transaxle LH Transaxle Lockout Rod RH Transaxle Lockout Rod Parking Brake Linkage Transaxle Expansion Reservoir Parking Brake Fuel Tank Parking Brake Linkage PTO Clutch Lever Fuel Tank Cap Fuel Pump Air Cleaner Cover Latch Fuel Filter Fuel Pickup Line Oil Fill Air Cleaner Cover Oil Dipstick Muffler Guard Rubber Bumpers (Body Support) Muffler Heat Shield Top View (Engi
Component Identification LH Transmission Control Arm Steering Lever Dampening Springs RH Transmission Control Arm LH Transaxle RH Transaxle LH Transaxle Lockout Rod RH Transaxle Lockout Rod Parking Brake Linkage Transaxle Expansion Reservoir Parking Brake PTO Clutch Lever Fuel Tank Parking Brake Linkage Fuel Pump Fuel Tank Cap Fuel Filter (Not Visible) Fuel Pickup Line Air Cleaner Cover Latch Air Cleaner Cover Oil Fill/ Dipstick Rubber Bumpers (Body Support) Muffler Heat Shield Top View
Safety Instructions Pay particular attention to any information labeled DANGER, WARNING, CAUTION, IMPORTANT, and NOTE in this manual. ), read, When you see the Safety Alert Symbol ( understand, and follow the instructions. Failure to comply with safety instructions may result in personal injury.
Safety Instructions 6. 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. 7. Prolonged exposure to loud noise can cause impairment or loss of hearing. Operator hearing protection is recommended.
Safety Instructions OPERATING 1. Operate the mower only in daylight or in good artificial light with good visibility of the area being mowed. 2. Sit on the seat when starting the engine and operating the machine. Keep feet on the deck footrests at all times when the tractor is moving and/or mower blades are operating. Never operate the tractor without a deck or imple ment installed. 3.
Safety Instructions 13. Never adjust cutting height with the engine running. Before adjusting cutting height or servicing, disengage the blade clutch (PTO), stop the engine, and remove the ignition key. Wait for all movement to stop before getting off the seat. NOTE: The clutch brake should normally stop drive line rotation within five (5) seconds of disengaging the PTO clutch. 14. For side discharge mower decks, do not operate with the grass deflector chute removed.
Safety Instructions MAINTENANCE 1. 2. 3. 4. 5. To prevent accidental starting of the engine when servicing or adjusting the machine, remove the key from the ignition switch and disconnect the spark plug wires. 11. Use care when charging the battery or per forming maintenance on the battery and electrical system: a. To reduce fire hazards, keep the engine free of grass, leaves, excessive grease, and dirt.
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.
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.
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. 4. Tighten the bolt and nut until the axle spacer tube bottoms against the inside of the wheel fork (will not turn) while the wheel and spacer washers (if used) spin freely without binding.
Assembly Instructions PTO Shaft Guard Installation Mower Deck Installation on Tractor Position the shaft guard as shown and mount with two (2) 1/4-20 x 1/2 in. bolts. Deck Installation - Model MBV 1. Lightly grease each deck support arm (2) on the tractor. Refer to Mower Deck Installation photo for location of deck support arm.
Assembly Instructions Deck Installation - Model MBK Spring Tension Adjustment Nut Located Under Lower Spring Hook (Not Visible) 1. Lightly grease each deck support arm (2) on the tractor. Refer to Mower Deck Installation photo for location of deck support arm. 2. Engage the deck carrier frame tube sockets on the tractor support arms (refer to PTO Shaft Guard Installation photo for socket location), slide the deck onto the support arms approximately 3 in. (76 mm). 3.
Assembly Instructions 5. Slide the deck the rest of the way on the deck arms. 6. Install the hitch pin through the hole on the end of each support arm to lock the deck in place (refer to Deck Counterweight Spring Installation photo). Two (2) hitch pins are included in the owner’s packet of materials. 7. Remove Installation Tool from coupler ring and make sure the ring has “snapped” securely on the spline shaft. IMPORTANT: DO NOT operate tractor with Quick Coupler Installation Tool installed.
Assembly Instructions Deck Leveling 1. 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. (102 mm) high is a convenient gauge to measure blade height above ground during the leveling process. 2. Check the side-to-side level.
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. (For a mower with frequent operation, some of these items will not need to be checked every day, but the operator should be aware of the condition of each.) Body Rod For proper fuel and lubricants refer to Specifications.
Assembly Instructions DANGER Handle gasoline with care. Gasoline is highly flammable and its vapors are explosive. Use safe refueling procedures: • DO NOT fill fuel tank with the engine running. • If the engine is hot, allow to cool before refueling. • Use an approved fuel container. • Fuel the mower outdoors. • DO NOT smoke while refueling. Check that the engine cooling air intake screen is free of obstruction by grass clippings or debris and clean if required.
Assembly Instructions CHECK MOWER BLADE CONDITION, SHARPNESS, 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 REQUIRED Tilt-Up Latch Deck Secured in TILT-UP Position Position the hitch pins in the four deck support pins. Refer to the “Cutting Height Adjustment” decal on the deck gearbox cover.
Operating Instructions CONTROL IDENTIFICATION, LOCATION, AND FUNCTION CAUTION making a restart attempt. Prolonged cranking can damage the starter motor and shorten battery life. Release the key when the engine starts, and it will return to the RUN position. To stop the engine, rotate the key counterclockwise to the “O” position. ON OFF Before operating the mower, become familiar with the location and function of all operator controls.
Operating Instructions Engine Choke Forward Speed Control (FSC) 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 the choke control toward the OFF position, keeping enough choke to allow the engine to run smoothly as it warms up. As soon as possible, move the choke to the OFF position. A warm engine requires little or no choke for starting.
Operating Instructions Parking Brake Hourmeter 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. The hourmeter, which is located on the right front of the body, displays operating time accumulated while the ignition switch is in the ON position.
Operating Instructions The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers LEFT WHEEL STEERING LEVER FORWARD SPEED CONTROL LEVER (FSC) RIGHT WHEEL STEERING LEVER Forward Position (No Control Change) Full Forward Ground Speed Position Neutral-Park Position Intermediate Ground Speed Position Reverse Drive Wheel Motion Position Neutral-Park Position Fast Throttle Position Idle Position THROTTLE CHOKE Fast Throttle Position Idle Position Engaged Position Dis
Operating Instructions IMPORTANT: DO NOT crank the engine continuously for more than 10 seconds at a time. If the engine does not start, turn the key to the OFF position and allow a 60 second cool-down period between starting attempts. Failure to follow these guidelines can damage the starter motor and shorten battery life. Contact your Walker dealer or authorized engine dealer for additional help.
Operating Instructions Beginning Recommendations are: WARNING ♦ 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. In case either of the transmission drive belts break during operation, and if the machine is on a slope, the machine will freewheel down the slope. To maintain control, immediately (1) Release the steering levers and simultaneously (2) Move the FSC to the NEUTRAL-PARK position.
Operating Instructions 3. 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. 4. The FSC may be adjusted forward for faster ground speed and backward for slower ground speed. When mowing, ground speed should be adjusted to match the load on the cutter blades, i.e.
Operating Instructions CAUTION If the cutting blades strike a stationary ob ject while mowing, stop the mower imme diately, disconnect the spark plug wires, lift the deck, and inspect the deck and blades thoroughly for damage. Make sure that the blade timing has not been disturbed (the blades should be at 90 degrees to each other). Refer to REPLACING/REPAIRING the Blade Overload Shear Bolts in Mainte nance Instructions if blades are out of time.
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. Hydro Lockout Rod To move the mower with the engine NOT running (dead battery, maintenance, etc.), the transaxles are unlocked (released). 1. Raise the body. 2. Pull up the transaxle lockout rods on both the RH and LH transaxles and secure into place by shouldering both rods in the chassis notch area. 3.
Operating Instructions IMPORTANT: Operate the engine at full throttle when mowing, to allow the engine to produce full horsepower and to increase efficiency of the engine cooling system. • Keep the mower deck and discharge chute clean. • Mow with sharp blades. A dull blade tears the grass (resulting in poor lawn appearance) and uses extra power (slowing the mowing speed). • It is preferable to cut grass when it is dry and not too tall. Mow frequently and do not cut grass too short.
Operating Instructions Maximum Recommended Side Slope - Do Not Operate on Steep Slopes RECOMMENDATIONS FOR TILT-UP DECK OPERATION/TRANSPORT To avoid potential deck and/or tractor damage while using the tilt-up deck, the following recommendations are offered: • Do not move the tractor with the deck in the tiltup position since both the roller wheels (on the back of the deck) may be damaged by moving the tractor. The tilt-up configuration should only be used when the tractor is parked. 20° 22 in. 60 in.
Maintenance Instructions caution Maintenance procedures requiring special training or tools should be performed by a trained technician.
Maintenance Instructions IMPORTANT TIPS FOR CARE OF THE BRIGGS & STRATTON ENGINE - MOdel MBV 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/Stopping • Start engine with the throttle advanced off idle (1/4 to 1/2 throttle). This will aid starting, especially in cold weather. • Keep the battery fully charged.
Maintenance Instructions IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE - Model MBK KOHLER tips Fuel System • Operate the engine at full speed when mowing. This allows the engine to produce full horsepower and move more cooling air through the engine cooling fins. • Fuel must be clean - free from water, dirt, and or Air Cleaner System ganic material. • Change fuel filter on a regular basis and when contamination is suspected or found in the fuel.
Maintenance Instructions LUBRICATION lubrication 4. 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. Remove the dipstick again and check the oil lev el on the dipstick. The oil level should be within the “Operating Range” on the dipstick (between the LOW mark and the FULL mark). IMPORTANT: DO NOT operate engine without sufficient oil supply in the crankcase.
Maintenance Instructions 2. Before removing the dipstick, clean the area around it to keep any dirt or debris out of the engine. 3. Remove the dipstick and oil drain plug, and drain oil into a suitable container. Be sure to allow ample time for complete drainage. 4. Before removing the oil filter, clean the area around the filter to keep dirt and debris out of the engine. 5. Remove the old oil filter and wipe off the filter mounting surface on the engine.
Maintenance Instructions lubrication Engine Oil - Model MBK Engine Break-In Oil No special break-in oil is required. The engine is serviced with 10W-30, Service Class SG oil from the factory. Change the oil after the initial engine breakin period of 5 hours. Thereafter, change oil after every 100 hours of operation. Checking Engine Crankcase Oil Level Check the engine crankcase oil level before use and after each 8 hours of continuous operation.
Maintenance Instructions Oil Fill and Dipstick Dipstick and Oil Fill - Model MBK (View from Above Left Side of Tractor) Oil Filter Oil Drain lubrication 8. Reinstall the drain plug. Make sure it is tight ened to 10 ft-lb (13.6 N·m). 9. Fill the crankcase with new, clean oil. Use only crankcase lubricants recommended by the en gine manufacturer. Refer to Specifications in this manual or the engine owner’s manual. Use the recommended oil viscosity for the expected ambient temperature.
Maintenance Instructions Ident Lubrication No. Location Type 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Deck Caster Wheel Fork Pivot Deck Caster Wheel Bearing Tee Gearbox, Deck Blade Drive Gearbox Universal Joint Shaft Assembly Deck Support Arm Socket Pivot Assembly, Tilt-Up Deck Steering Lever Pivot Deck-to-PTO Coupling (Grease Slide Area) Universal Joint Tube Assembly Deck Support Arm Pivot FSC Lever Pivot Body Latch Clutch Actuator Rod PTO Clutch Lever Pivot Transaxle Oil Reservoir lubrication No.
Maintenance Instructions lubrication 1 1 2 2 3 4 4 5 6 6 7 7 7 7 8 22 & 28 9 10 11 24 & 27 11 26 25 26 24 12 13 14 23 22 21 15 18 17 16 14 18 19 20 Chassis and Deck Lubrication Points 45
Maintenance Instructions lubrication 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.
Maintenance Instructions lubrication/CLEANING CLEANING Oil Filter CAUTION If a pressure washer is used on the exposed working parts, avoid water on the electrical parts and the engine cooling system. Oil Filter Guard Oil Drain Plug Transaxle Oil Drain Plug, Filter, and Guard Location (Shown with Deck Support Arms Removed for Clarity) 3. Reinstall drain plugs. 4. Remove the oil reservoir hose attached to the elbow on top of the transaxles and remove the elbows to access the oil fill openings. 5.
Maintenance Instructions CLEANING Check Airflow with Hand caution Operating the engine with a blocked air intake screen, dirty or plugged cooling fins, and/or cooling shrouds removed will cause engine damage from overheating. Clean these areas of dirt and debris Cooling System Airflow Every 100 hours, inspect and clean the cooling fins (more often when operating in extremely dusty, dirty conditions).
Maintenance Instructions CLEANING Engine Air Cleaner System IMPORTANT: The Cummins/Fleetguard air cleaner uses a dry paper-type air filter element. NEVER apply oil to the paper element. Cummins/Fleetguard OptiAir™ Air Cleaner A remote mounted Cummins/Fleetguard OptiAir™ air cleaner provides the air filtering function.
Maintenance Instructions Inspect the paper element after every 100 hours of service and replace the element and safety filter yearly (or when dirty or damaged). More frequent replacement may be required when operating in extremely dusty conditions as indicated by the air restriction gauge. Service the air cleaner as follows: 1. 2. 3. Lift Mono Latch Twist Lock™ and twist the OptiAir™ cover to the left into the “open” position to remove the air cleaner cover. Wash the cover and dust ejection valve.
Maintenance Instructions cleaning 10. Install the cover with the word “DOWN” properly oriented to the bottom of the canister. Twist the OptiAir™ cover to the right and put into the “closed” position. Mono Latch Twist Lock™ 2 3 Tilt-Up Latch DOWN Deck Secured in TILT-UP Position Orient to Bottom of Canister DAnger Dust Ejection Valve Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position. Proper Orientation of Air Cleaner Cover 11.
Maintenance Instructions Transaxle Cooling Fins Keeping the cooling fins on the transaxles clean and free of obstruction is essential to avoid overheating the transmission fluid and shortening transmission life. The cooling fins should be checked every 100 hours; and cleaned if necessary. To clean the fins, use compressed air and/or a pressure washer. The cooling fins extend all the way around the housing -- the fins underneath need to be clean as well as the more visible fins above.
Maintenance Instructions CHECKING/SERVICING CHECKING/SERVICING Charging the Battery DAnger To prevent accidental starting of the en gine when servicing or adjusting the ma chine, remove the key from the ignition switch and disconnect the spark plug wires. Security of Air Cleaner System NOTE: The following inspection is only an exter nal inspection and should be done without “dis turbing” the filtration components.
Maintenance Instructions CHECKING/SERVICING 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 wear on the engine and blade drive by pulling hard. 1. Stop the engine, remove ignition key, and dis connect the spark plug wires before raising the mower deck to service blades. 2.
Maintenance Instructions Drive Belts Raise the body and inspect the condition of the three (3) drive belts after every 25 hours of operation -- engine/PTO drive and ground drive. If the belts show signs of cracking or deteriorating, the belts should be replaced. Refer to REPLACING/ REPAIRING the Drive Belts in this section. CHECKING/SERVICING Blade Brake Action WARNING It is important to check and maintain blade brake action for safe operation of the machine.
Maintenance Instructions Safety Switch System WARNING It is important to check and maintain the safety switch system for safe operation of the machine. CHECKING/SERVICING Forward Speed Control Friction Lock The FSC friction lock is designed to hold the selected forward travel speed when the steering levers are moved and yet the friction is not too heavy to make moving the FSC control difficult (too much friction). The procedure for checking the FSC friction lock is as follows: 1.
Maintenance Instructions REPLACING/REPAIRING REPLACING/REPAIRING Drive Belts There are three (3) individual belts on the machine: dANGER To prevent accidental starting of the engine when replacing parts or repairing the machine, remove the key from the ignition switch and disconnect the spark plug wires. • Engine/PTO Belt (Matched Set) • Ground Drive Belt The belts may be removed and replaced using the procedures described on the following pages.
Maintenance Instructions REPLACING/REPAIRING Engine/PTO Belt 1. To remove the engine/PTO belt: b. Relax belt by depressing idler arm. a. c. Roll the belt off the pulley and remove the belt. Remove wire lock pins (4), open belt guards. Upper LH Guard Idler Arm Wire Lock Pin Right Hand Guard Lower LH Guard Wire Lock Pins Engine/PTO Belt (Matched Set) PTO Pulley PTO Guard Engine/PTO Belt (Belt Guards Open) (Engine Hidden for Clarity) 2. To replace the engine/PTO belt: a.
Maintenance Instructions REPLACING/REPAIRING Ground Drive Belt 1. To remove the ground drive belt: a. b. Slide belt off pulleys, then release the idler. Depress the spring-loaded idler to relax belt. LH Transaxle Ground Drive Belt RH Transaxle Drive Pulley Idler Pulley Tension Spring Depress Idler Pulley to Relax Belt Ground Drive Belt Assembly (Disengaged) 2. Reverse the procedure to install the ground drive belt.
Maintenance Instructions REPLACING/REPAIRING Fuel Filter DANGER Models MBV and MBK are equipped with an in-line fuel filter. Visually inspect the filter periodically, and replace the filter yearly. Gasoline is extremely flammable and can be highly explosive. To minimize danger: • Use only an approved fuel container for gasoline. In-Line Fuel Filter • DO NOT allow open flames or sparks near the machine while performing maintenance or refueling; DO NOT smoke while working with fuel.
Maintenance Instructions REPLACING/REPAIRING Blade Overload Shear Bolts PTO Shear Pin The cutting blade is keyed to the blade hub by two (2) shear bolts (10-24 x 5/8 in. stainless steel machine screws). These bolts are designed to shear and protect the blade drive gearbox from damage if the blade encounters a shock load. The PTO drive shaft connection to the deck gearbox has a shear pin to provide shock load protection to the mower deck drive.
Maintenance Instructions Mower Blades Mower blades are removed and remounted as described in Sharpen Mower Blades instructions. During the course of sharpening and inspecting mower blades, if there are any of the following conditions of wear or damage, blades should be replaced for reasons of safety and performance of the machine: • An excessive amount of the flat section of the blade has been ground away (removed) when the blade is sharpened. Replace the blade when less than a 3/4 in.
Maintenance Instructions ADJUSTMENTS ADJUSTMENTS 2. Transmission Control IMPORTANT: The proper adjustment of the transaxle control stops is essential for efficient operation and life of the transaxle. These stops are properly adjusted at the factory and should only require readjustment if the transaxle or related control linkage is removed or changed. Adjust the position of the RH lever by turning the stop bolt in the Speed Control Actuator in or out.
Maintenance Instructions ADJUSTMENTS Steering Handles Adjustment - Step 2 Neutral Position Adjustment - Step 3 1. 1. An adjustment range of approximately 3 in. (76.2 mm) is available on the steering handles - the handles can be adjusted forward or aft depending on the arm length of the operator. The handles can be adjusted by loosening the locknut at the pivot point and the locknut holding the handle in position in the adjustment slide.
Maintenance Instructions ADJUSTMENTS 6. One at a time adjust the left and right Control Rods to find the center of the neutral window. Shorten the rods until the drive tire turns forward then lengthen it until the drive tire turns in reverse (approximately 1 turn). Position the rods halfway between forward and reverse. Tighten the jam nuts. 7. Lower drive tires onto ground. 1/4 in. Wrench Actuator Rod Length Adjustment 3. Block the tractor up so the drive tires are off the ground. 4.
Maintenance Instructions Full Forward Speed Adjustment - Step 4 1. Move the FSC to the full FORWARD speed position. 2. Raise the body. The set screws in the left and right Transmission Control Arms should not be contacting the locating stud in the transaxle. If they are, back the set screws out until they do not touch. Neutral Travel End Neutral Travel End ADJUSTMENTS Straight Tracking Adjustment - Step 5 1.
Maintenance Instructions Neutral Switch Adjustment - Step 6 1. ADJUSTMENTS Forward Speed Control Friction Adjustment - Step 7 Place the FSC in NEUTRAL position. Loosen the bottom locknut and adjust switch body up with top locknut until the switch contacts open. Turn the locknut an additional 1 turn. Tighten bottom locknut. FSC Switch FSC Switch Location Switch Closed in Neutral FSC Switch Actuator Arm Top Locknut Bottom Locknut FSC Position With Levers 1.
Maintenance Instructions ADJUSTMENTS Blade Clutch (PTO) Clutch Engagement/Belt Tension The clutch engagement and PTO belt tension are adjusted using the clutch rod. Initially, after installing new PTO belts, after 10 hours and every 100 hours thereafter, check and adjust for the dimensions as shown in the PTO Clutch Engaged and PTO Clutch Disengaged illustrations. Adjust the length of the clutch rod to achieve a bolt head clearance of 1/4 in. to 5/16 in. (6.35 mm to 7.94 mm) with the clutch engaged.
Maintenance Instructions ADJUSTMENTS Use the following procedures to check and adjust clutch disengagement and brake action: Clutch Disengagement/Brake Action WARNING Idler Pulley Maximum Travel Adjustment - Step 1 It is important to check and maintain blade brake action for safe operation of the machine. The declutched or disengaged position of the blade clutch idler pulley is adjustable and is set to give belt release without excessive slack and to apply the blade brake.
Maintenance Instructions Blade Brake Band Adjustment - Step 2 After the maximum pulley travel is set, adjust the working travel of the clutch idler pulley by adjusting the brake band nut and make the following adjustment as needed: 1. Adjust the blade brake band, using the adjustment nut until pulley travel is approximately 5/8 in. to 3/4 in. (16 mm to 19 mm) from engaged to disengaged.
Maintenance Instructions ADJUSTMENTS/ ELECTRICAL SYSTEM Tilt-Up Deck Adjustable Stop ELECTRICAL SYSTEM 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 (4) hitch pins used for height adjustment should sit flush on the washers above the deck pin bushing. On a level surface, if any pin is sticking up (likely the front pins), tighten the opposite side or loosen the same side to lower the pin.
Tractor Decals item no. part description LOCATION no. no.
TRACTOR DECALS . . 9 . 5 5 . 12 . 13 . 14 . . 4 . 2 . 10 11 . 3 . 1 . . 3 16 7 11 . 6 . . 8 Refer to Decks Parts Manual for Deck Decals Effective Date 01-01-10 15 Use only genuine Walker® replacement parts.
Body / Chassis Assembly item no. part description no. no. req’d Seat Assembly 1 5103 Seat 2 7203 Seat Spring Plate 3 7223-1 Compression Spring 4 7845 Rubber Bumper (1.375 x .63) 5 5841 Retainer Washer (3/8 x 1-1/4) 6 7434 Washer (3/8 x 1-1/4 x 1/4) 7 5841-1 Retainer Washer 8 7440-5 Shock Mount (1-1/4 x 3/4) Body Assembly 9 4105-2 Rear Body (Includes Item # 10) 10 4190-2 Insulation Foam Pad 11 4100-1 Front Body 12 5989-4 Dome Plug (3/8) 13 5989-3 Dome Plug (5/16) 14 5845 Rubber Bumper (1.50 x 1.
BODY / CHASSIS ASSEMBLY . . . 9 1 . 10 . 2 . . . . 13 3 F227 . 4 5 F009 . . . 8 . F025 . F009 12 8 . F009 18 . 18 . 11 6 . . F025 12 13 7 F257 18 17 . F002 . . F029 F020 . . . . 51 52 F341 F029 16 53 55 54 F093 . . . . . . . . 57 . F004 F342 . . . F246 28 F002 27 . 29 F127 F009 F120 14 . . . F004 . . . F342 56 F004 15 32 . 34 33 31 30 . F051 F278 F038 . . . . . . 19 36 F344 . . . F034 . 35 F347 F348 37 38 . . . .
Main Component Power Transmission item no. part description no. no.
Main Component Power Transmission . . . . 1 F009 5 4 F008 . . . F029 F061 F178 . . . . . 38 . 42 F035 45 . . F024 46 47 . 2 F183 F093 . 3 . Refer to Engine Group (Model MBV or MBK) F009 F024 . F009 . 44 43 42 . F031 39 F060 F060 F010 F024 38 . 5 . F009 3 . F034 . 4 . 40 . 6 F034 F009 . F034 F009 F012 F004 F009 . F120 12 F009 . F031 . Refer to Hydrostatic Ground Drive Assemblies F350 F381 F120 3 . . 35 . . F067 .
Engine Group (Model MBV) item no. part description no. no.
Engine Group (Model MBV) . . . . . . 5 F009 4 F004 . F009 F004 F050 3 2 . F050 11 F392 10 . . 11 . . . F004 . . F032 12 F050 F179 . 6 . 1 . F009 F034 13 F004 . 16 . . . 9 7 8 7 . 15 . . 37 36 . . 27 Refer to Body / Chassis Assembly . F050 28 . F005 29 F201 . F164 . 14 30 . . . F009 . . . F050 F002 . 35 . F025 31 . 34 33 . F002 32 17 . 18 . 19 17 20 . . 26 . . . .
Engine Group (MOdel MBK) item no. part description no. no. req’d Choke and Throttle Assemblies Precleaner Assembly 1 4088-10 2 3 4 5 6 7 8 9 2088-1 2090-3 2090-1 2088-2 2090-2 7840 2012 5091-11 Air Cleaner Assembly (Includes Items # 2-6 & 9) Air Cleaner Band Safety Filter Insert Air Cleaner Cartridge Air Cleaner Cap Vacuator Valve Hose Clamp (1-5/16 to 2-1/4) Flex Hose (1-3/4 x 2) Air Flow Indictor & Nipple 1 1 1 1 1 1 2 1 1 Body Support Rubber Bumper (1.0 x .
Engine Group (Model MBK) . . . . . 5 . . 4 12 11 10 . . 3 13 . 11 F025 . F025 . . F009 2 . . 1 . 6 F034 . 16 . 15 F002 F002 . . 14 13 7 . 9 8 7 . 17 . 18 . . Refer to Body / Chassis Assembly 28 29 . 19 19 . 20 . . 30 31 34 33 . . . . F050 . F164 . . 32 F005 F201 . F009 35 . . F050 F002 . 39 F025 . 38 37 . F002 36 21 . . 27 . 26 22 . F175 . . F439 . . Refer to Body / Chassis Assembly F184 . F185 25 .
Hydrostatic Ground Drive Assemblies item no. part description no. no.
. Hydrostatic Ground Drive Assemblies . 1 . F029 . . . . F031 Refer to Engine Group (Model MBV or MBK) F004 33 F050 31 . 31 32 31 30 26 29 . . F447 F029 32 31 30 . . F029 29 . F029 10 10 8 . . . . . . 24 28 25 . F009 F173 F004 . F009 9 26 F173 . . . 25 26 . . 17 . 19 F042 18 F182 14 F004 10 10 . 18 . . F040 F034 F013 . 12 13 . F031 . 23 F004 F182 47 . F369 . 48 46 45 18 . F183 . . F183 . 18 . .
Steering Control Assemblies item no. part description no. no.
Steering Control Assemblies . . 1 . . 2 F093 . F183 . . F427 . F093 . . 3 . 4 . F059 F386 . F024 . . . 29 8 . F345 . F167 F035 . Refer to Hydrostatic Ground Drive Assemblies F198 . 27 34 . . F009 F004 . 10 33 F032 . 11 24 . F005 23 26 29 F188 31 F009 11 11 32 30 F032 11 . 34 F004 . 31 F005 F345 28 10 . 14 . 14 16 17 F024 24 F391 F146 12 Refer to Hydrostatic Ground Drive Assemblies . 23 15 F183 F008 F373 F009 F008 26 27 . .
Electrical Assembly (MODEL MBV) item no. part description no. no.
Electrical Assembly (MODEL MBV) . Refer to Body / Chassis Assembly 27 . . . . 29 . . . 28 B F349 . A . . 4 6 5 D 1 2 3 . C 27 27 . . . F019 . F019 . F050 9 F . G 11 F002 F026 H BLK . F050 . 1 . . F050 F031 . 12 8 F004 10 F004 . 26 . 7 . F050 F029 . 25 F004 2 E 24 . 23 24 . . F026 22 F002 21 . 19 20 . . F475 . F381 Refer to Body / Chassis Assembly . I F004 F002 18 F004 PUR RED F004 . . . YEL . . 13 .
Electrical Assembly (MODEL mbk) item no. part description no. no.
Electrical Assembly (mODEL mbk) . Refer to Body / Chassis Assembly 24 . . . 26 . . . 25 B F349 1 . 2 A . . . 4 6 . 5 D 3 C 24 24 . . F019 . F019 . . . 10 F004 12 . F026 F004 F050 . 1 F050 F031 . . . F002 8 . . 23 . 7 F050 9 . F050 F029 . BLK F G 11 H 22 F004 E 2 21 . . 21 20 19 RED . F026 18 F002 17 F475 I . F004 . F381 J Refer to Body / Chassis Assembly F002 16 . . F004 F029 . . 15 .
Light Kit / Hitch KIT item no. part description no. no. req’d Kit 5989-11 Light Kit Includes Items # 1-14, fasteners listed and instructions. May be ordered as a dealer-installed option. Contact your Walker dealer. 1 2 7989-2 7989-3 3 4 5 6 7 5996-4 5996-5 7834-2 5977-1 7995-4 8 5996 9 10 11 12 13 14 5975-1 6940-10 5995-5 5995 5995-2 7993-1 Light Assembly (Halogen) Wire Harness Ext./Halogen (Includes Item # 3) 16-14 GA Bullet Cntr. (M) 16-14 GA Bullet Cntr.
Light Kit / Hitch KIT . . . 1 . . . Refer to Body / Chassis Assembly 14 5 . 3 1 . 4 . F091 1 . . 6 F052 5 . 5 13 . . . . 12 . 11 10 9 8 7 2 1 4 3 6 . F009 PUR PUR/WHT To Main Harness . 15 . . F043 16 . F012 Refer to Body / Chassis Assembly Refer to Body / Chassis Assembly Effective Date 01-01-10 Use only genuine Walker® replacement parts.
Wiring Schematic (model mbv) WALKER MODEL MBV Beginning S/N 2010-104436 RELAY - A RELAY - C IGNITION RELAY IGNITION RELAY START 30 + 87A 30 + 87 START 30 + 87A 30 + 87 RUN PTO ON 30 + 87 30 + 87A RUN PTO ON 30 + 87 30 + 87A OFF OFF IGNITION SWITCH CIRCUITS OFF RUN RELAY - B 30 + 87A 30 + 87 RUN PTO ON 30 + 87 30 + 87A OFF B+A S1 = START CIRCUIT S2 = START/ACCESSORY CIRCUIT M = MAGNETO GROUND CIRCUIT B = BATTERY CIRCUIT A = ACCESSORY CIRCUIT G = GROUND CIRCUIT START RELAY START G+M B +
Wiring Schematic (model mbk) WALKER MODEL MBK Beginning S/N 2010-104768 RELAY - A RELAY - C IGNITION RELAY IGNITION RELAY IGNITION SWITCH CIRCUITS START 30 + 87A 30 + 87 START 30 + 87A 30 + 87 RUN PTO ON 30 + 87 30 + 87A RUN PTO ON 30 + 87 30 + 87A OFF OFF OFF RUN RELAY - B 30 + 87A 30 + 87 RUN PTO ON 30 + 87 30 + 87A OFF B+A S1 = START CIRCUIT S2 = START/ACCESSORY CIRCUIT M = MAGNETO GROUND CIRCUIT B = BATTERY CIRCUIT A = ACCESSORY CIRCUIT G = GROUND CIRCUIT START RELAY START G+M B +
MAINTENANCE AND SERVICE RECORD SHEET DATE SERVICE ENGINE ITEM HOURS ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________ ______________________________________________________________________________________________________________
LIMITED WARRANTY FOR WALKER MODEL MBV AND MBK RIDER MOWERS 1. 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.
Sound - Model MBV Vibration - Model MBV[; Sound Test Vibration Level Sound test conducted was in accordance with 2000/14/ EC and was performed on 28 May 10 under the conditions listed: General Condition: Clear Temperature: 85 (F)o 29 (C)o Wind Speed: < 5 mph (< 8 kmh) Humidity: 20% Tests were performed on 28 May 10 under the conditions listed: Barometric Pressure: 83.
