OWNER’S MANUAL Safety, Assembly, Operating, and Maintenance Instructions Model MT (20.0 / 25.0 HP) (Covers Serial Numbers 95-21329 and on) ™ Please Read and Save These Instructions For Safety, Read All Safety and Operation Instructions Prior to Operating Machine Effective Date: 08-14-98 P/N 8000-1 Price $5.
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 General Information ________________ 1 Operating Instructions_____________ HIGHLIGHTED INFORMATION _____________ GLOSSARY ____________________________ IDENTIFYING NUMBER LOCATIONS ________ ENGINE SERIAL NUMBER LOCATION ______ SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS__________ 1 1 1 2 CONTROL IDENTIFICATION, LOCATION, AND FUNCTION _____________ Operating Controls ___________________ Engine Choke _______________________ Engine Throttle ______________________ Forward Speed Control (
Table of Contents Maintenance Instructions __________ 44 MAINTENANCE SCHEDULE CHART _______ IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE _____ Fuel System _________________________ Starting/Stopping _____________________ Cooling System ______________________ Air Cleaner System ___________________ Oil _________________________________ LUBRICATION _________________________ Engine Oil ___________________________ Engine Break-In Oil ___________________ Checking Engine Crankcase Oil Level ____ Changing Engine
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 Tractor Serial Number Location Serial Number The detailed servicing and repair of the engine, hydrostatic transmission, and gearboxes are not covered in this manual. Only routine maintenance and general service instructions are provided. For the service of these components during the limited warranty period, it is important to find a local, authorized servicing agent of the component manufacturer.
Specifications MT 20.0 HP MT 25.0 HP Manufacturer/Model Kohler CH20, 2 Cyl., Gasoline (Air Cooled) Kohler CH25, 2 Cyl., Gasoline (Air Cooled) Displacement 38.1 cu. in. (624 cc) 44.0 cu. in. (725 cc) HP (@ 3600 RPM) 20.0 25.0 Max. RPM (No Load) 3750 3750 Governed RPM 3600 3600 Max. Torque [ft-lb (N⋅ m) @ RPM] 32 (43.4) @ 2500 39.5 (53.6) @ 2400 Idle RPM 1200 ± 75 1200 ± 75 MODEL ENGINE Champion RC12YC Spark Plug Type Champion Spark Plug Gap .030 in. (.76 mm) .030 in. (.
Specifications MT 20.0 HP MT 25.
Specifications MT 20.0 HP MT 25.0 HP 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) 91 in. (231 cm) 91 in. (231 cm) MODEL TIRE PRESSURE DIMENSIONS (Tractor and Mower)* Length Width 49 in. (124 cm) 49 in. (124 cm) Height 44 in. (112 cm) 44 in. (112 cm) Wheel Base (Tractor) 42-1/4 in. (107 cm) 42-1/4 in. (107 cm) Tread Width (Tractor) 29-3/4 in. (76 cm) 29-3/4 in.
Specifications MT 20.0 HP MT 25.0 HP Engine PTO Walker P/N 8230 Walker P/N 8230 Jackshaft Drive Gates 3VX355 (or Walker P/N 6231) Gates 3VX355 (or Walker P/N 6231) Ground Drive, Micro-V Walker P/N 7248 Walker P/N 7248 Blower (GHS Model) Gates 3VX280 (or Walker P/N 7234) Gates 3VX280 (or Walker P/N 7234) Blower 4 x 10 x 1/4 in. (10 x 25 x 1 cm) Three-Blade Paddle Wheel (Driven by Mower Engine) 4 x 10 x 1/4 in.
Component Identification NOTE: Control Identification shown in Operating Instructions section. Catcher Door Safety Latch Turbine Precleaner Grass Handling System 7.
Component Identification Catcher Door Gas Spring Instrument Panel Guard Removable Grass Catcher Screen (Not Visible) Catcher Exhaust Deflector Catcher Lift / Dump Handle Instrument Panel Box (Shock Mounted) Catcher Door Dump Plate Catcher Door Handle Deck Lift Rod Muffler Left Hand Drive Wheel Oil Filter Tailpipe Anti-Scuff Roller Oil Drain Plug Tailwheel Fork and Wheels Rear View and Left Side View 8
Component Identification Donaldson Air Cleaner (Primary Air Cleaner) Air Cleaner Cover Air Cleaner Base Plate Fuel Filter Fuel Pump Engine Air Cleaner (Secondary) Air Restriction Indicator (Not Visible) Muffler Grass Shield Air Intake Hose (Primary to Secondary) Throttle and Choke Linkage Muffler Heat Shield Fuel Tank Oil Dipstick/Oil Fill Rubber Bumper (Catcher Support) Precleaner Tube Muffler Jackshaft 20 Amp Fuse (Starter Solenoid) PTO Gearbox Dipstick GHS Blower Turbine Precleaner RH Tr
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. Failure to comply with safety instructions may result in personal injury.
Safety Instructions 6. 7. 8. 9. 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. Prolonged exposure to loud noise can cause impairment or loss of hearing.
Safety Instructions 10. Disengage the blade drive when transporting the machine across drives, sidewalks, etc. Never raise the mower deck while blades are rotating. 17. In case of a clogged or plugged mower deck or GHS catching system: 11. The maximum recommended side slope operating angle is 20 degrees or 33% grade. When operating the machine on a slope, reduce speed and use caution to start, stop, and maneuver.
Safety Instructions 4. Perform only maintenance instructions described in this manual. Unauthorized maintenance operations or machine modifications may result in unsafe operating conditions. 5. If the engine must be running to perform a maintenance adjustment, keep hands, feet, and clothing away from moving parts. Do not wear jewelry or loose clothing. 6. Always use the proper engine service manual when working on the engine.
Safety Instructions SAFETY, CONTROL, AND INSTRUCTION DECALS Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.
Safety Instructions SAFETY, CONTROL, AND INSTRUCTION DECALS Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.
Assembly Instructions SETUP INSTRUCTIONS Dry Battery Service Walker Mowers are shipped partially assembled. After uncrating the tractor and mower deck, initial setup is required. DANGER Activating a battery can be dangerous. The battery should be taken to a reliable service station, battery store, or power equipment dealer where a trained technician can activate the battery safely. DO NOT attempt to activate the battery unless you are experienced in battery service work.
Assembly Instructions 3. After the battery is filled with electrolyte, replace the filler caps and charge the battery. Refer to Battery Charging . WARNING Make sure the battery cap vents are open. Improper venting of the battery COULD cause a battery explosion. Battery Charging DANGER BATTERIES PRODUCE EXPLOSIVE GASES Battery Clamp Secured by Wing Nut(s) • Charge the battery in a well-ventilated area, so that gases produced while charging can dissipate.
Assembly Instructions Deck Discharge Shield Installation (Side Discharge Models Only) Grease Fitting Locations Attach the deck side discharge shield by positioning the shield hinge lug in front of the deck mount and fastening with two 3/8-16 x 1-1/4 in. bolts, 3/8-16 ESNA nuts, and 3/8 in. wave spring washers. The wave washers fit between the two hinging surfaces. Tighten the nuts until the shield moves freely but is not loose.
Assembly Instructions NOTE: When installing the DSD52 or DSD62 Mower deck, make sure to retract the dolly wheel after mounting the deck on the tractor. 3. 4. 5. Spring-Loaded Coupler Ring In Fully Forward Position If the deck is rear discharge (GHS equipped model), the rear discharge chute will need to be aligned and connected to the blower inlet during the last 2 in. (51 mm) of slide action on the support arms.
Assembly 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. WARNING Spring Tension Adjustment Nut Located Under Lower Spring Hook (Not Visible) The machine must be shut off during this procedure. Counterweight Springs Clip Onto Body With Forward Body Tilted Up 2. Check the side-to-side level. Rotate each blade sideways and measure the distance from blade tip to ground on each side.
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.) For proper fuels and lubricants refer to Specifications.
Assembly Instructions CHECK GEAR AXLE OIL LEVEL Counterweight Spring Clip Refer to Gear Axle Lubrication in Maintenance Instructions. Deck Lift Rod INSPECT FOUR (4) DRIVE BELTS Engine PTO Drive, Jackshaft Drive, Hydrostatic Ground Drive, and GHS Blower Drive (if equipped). CHECK HYDROSTATIC TRANSMISSION OIL LEVEL Body Bracket Refer to LUBRICATION for Checking Hydrostatic Transmission Fluid Level in Maintenance Instructions.
Assembly Instructions CAUTION Do not operate machine with deck tilt-up pivot joint unlocked. DANGER Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position. 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.
Operating Instructions CONTROL IDENTIFICATION, LOCATION, AND FUNCTION Operating Controls CAUTION Before operating the mower, become familiar with the location and function of all operator controls. Knowing the location, function, and operation of these controls is important for safe and efficient operation of the mower. Forward Speed Control (FSC) Engine Choke The choke control lever (black knob) is located on the left side of the seat.
Operating Instructions Steering Levers Choke Throttle Choke and Throttle Location Engine Throttle The throttle control lever (red knob) is located on the left side of the seat and is used to control engine speed. Moving the lever forward toward the FAST position increases engine speed; moving it backward toward the IDLE position decreases engine speed.
Operating Instructions Front Body Latch Release The front portion of the tractor body hinges forward for maintenance access and is latched down in the OPERATING position. To raise the body, move the latch release forward. NOTE: The transmission plunger on the side of the transmission case (activated by the LOCKOUT LEVER) must be completely released during operation of the mower, otherwise operation of the transmission will be erratic.
Operating Instructions The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers LEFT WHEEL STEERING LEVER RIGHT WHEEL STEERING LEVER FORWARD SPEED CONTROL LEVER (FSC) Forward Position (No Control Change) Full Forward Ground Speed Position Intermediate Ground Speed Position Neutral-Park Position Neutral-Park Position Disengaged Position Reverse Drive Wheel Motion Position Engaged Position BLADE CLUTCH (PTO) Pull Up to Engage Fast Throttle Position ON Position En
Operating Instructions Instrument Panel This illustration shows the configuration of the switches and indicators located on the instrument panel.
Operating Instructions Hourmeter Ignition Switch The hourmeter displays operating time accumulated while the ignition switch is in the ON position. The ignition switch is used to start and stop the engine. The switch has three positions: “O” is the OFF position, RUN is the position the key returns to after starting, and “S” is the START position. When starting the engine, turn the key clockwise to the “S” position. Do not hold the key in the “S” position longer than 10 seconds.
Operating Instructions STARTING THE ENGINE Cold Start Lever Engaged CAUTION Before operating the mower, read and understand all Safety Instructions and Operating Instructions. WARNING NEVER run the engine in an enclosed or poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas. 1. Before attempting to start the engine, make sure the operator is in the seat, the Forward Speed Control is in NEUTRAL-PARK position, and the blade clutch and parking brake are DISENGAGED.
Operating Instructions IMPORTANT: Make sure the choke is in the OFF position during normal engine operation; running with the choke in the ON position CAN damage the engine. ADJUSTING GROUND SPEED AND STEERING IMPORTANT: If the DSD52 or DSD62 Mower deck is installed on the tractor, make sure the dolly wheel is retracted BEFORE moving. CAUTION Learn to START, STOP, and MANEUVER the mower in a large, open area.
Operating Instructions ENGAGING THE MOWER 1. Set the engine throttle at about 1/3 speed. Do not attempt to engage the blade clutch at high engine speeds. This will drastically shorten drive belt life. Use only moderate engine speed when engaging the blade clutch. 2. Pull the blade clutch lever SLOWLY up to engage the mower blades. Pull Steering Levers With Left Hand CAUTION Forward Speed Control (FSC) Keep Feet On Footrest When Moving Correct Operator Hand Position on the Controls 3.
Operating Instructions IMPORTANT: DO NOT disengage the blade clutch with high engine speed (above 1/2 throttle) since the brake action on the blade drive will cause premature wear of the brake band. WARNING A brake stops the cutter blades (and blower on GHS equipped models) from freewheeling within five (5) seconds after disengaging the clutch. If the brake system malfunctions and the blades do not stop within five (5) seconds, the brake should be adjusted or repaired before operating the mower.
Operating Instructions ADJUSTING CUTTING HEIGHT 3. WARNING The engine must be stopped before adjusting cutting height. Disengage the blade clutch (PTO), stop the engine, and remove the ignition key. Wait for all movement to stop before getting off the seat. The mower will “freewheel” with the levers in the LOCKOUT position. The levers must be in the highest position to completely unlock the transmissions.
Operating Instructions RECOMMENDATIONS FOR MOWING IMPORTANT: Operate the engine at full speed 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 • When using a side discharge mower deck, the side discharge shield must not be removed and must be kept in the lowest possible position to deflect grass clippings and thrown objects downward.
Operating Instructions 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) and the GHS discharge chute may be damaged by moving the tractor. The tilt-up configuration should only be used when the tractor is parked.
Operating Instructions GRASS HANDLING SYSTEM (GHS) GHS Model Only Catcher Door Safety Latch Powerfil ® Drive Motor Exhaust Screen (Removable) Grass-Pak ® Vane Switch Exhaust Deflector Actuator Rod “Full” Signal Horn Delivery Chute Catcher Door PTO Clutch Catcher Door Spring PTO and Blade Gear Drive Grass Catcher Dump Handle Powerfil ® Delivery Spout Body Chute Assembly Blower Deck Discharge Chute Rear Discharge Mower Deck GHS Flow and Components 37
Operating Instructions General Information The Grass Handling System (GHS) consists of a rear discharge mower deck connected to a 10 in. (25 cm) blower and a rear mounted grass catcher with 7.0 bushel (246 liters) capacity or optional 9.5 bushel (335 liters) capacity. The GHS blower operates any time the mower blade clutch is engaged and moves grass through the rear discharge deck chute into the grass catcher. Blower airflow is exhausted out the back of the grass catcher, through a filtering screen.
Operating Instructions Clogging Checklist In case of clogging, there will be a distinct change in the sound of the blower, i.e., the blower sound will stop. Also, the mower deck will begin to leave a trail of grass clippings. When this occurs, stop the engine, disconnect the spark plug wires, and make sure all movement has stopped before attempting to unclog. • Check the amount of flat section remaining at blade tip. This is the area that is ground away (removed) when the blades are sharpened.
Operating Instructions • Check that the openings in the removable air exhaust screen in the grass catcher are not plugged. If the screen is clogged, refer to Cleaning the GHS Exhaust Screen in this section. Remember, anything that restricts airflow or material flow along the entire path from the mower deck to the grass catcher can cause clogging. Using the Tilt-Up Deck Refer to CLEANING of Grass Buildup in Mower Housing for Tilt-Up Decks in Maintenance Instructions.
Operating Instructions Dumping the Catcher For dumping, the catcher either tailgate dumps into a disposal area or dumps into the optional dump bag. The dump bag is a reusable nylon fabric bag designed to conveniently move grass clippings from the catcher to a remote disposal area or container. Safety Latch Tailgate Dumping 1. Open the back door by lifting on the door handle.
Operating Instructions 3. Hook the bottom of the bag over the rear bumper while lifting on the handle strap. 4. Tilt the catcher back to dump into the bag by lifting on the catcher lift handle on the lower front corner of the catcher with the one hand while continuing to hold up on the bag strap with the other hand. Refer to photos for positioning the bag and dumping.
Operating Instructions Door Actuator Arm Grass Catcher Catcher Door Gas Spring Cable Guide Lift Channel Power Dump Ram Actuator Fork Catcher Door Cable Rod Guide Cable Assembly Gas Spring Actuator Mount Assembly Dog Leg Assembly Rubber Bumper Power Dump Components 43
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 KOHLER ENGINE KOHLER TIPS • Operate the engine at full speed when mowing. Fuel System 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 3. Remove the dipstick, wipe off with a clean rag, then reinsert the dipstick into the tube and press all the way down. 4. Remove the dipstick again and check the oil level on the dipstick. The oil level should be within the “Operating Range” on the dipstick (between the “L” mark and the “F” mark). WARNING DO NOT attempt to lubricate the machine with the engine running. Disengage the PTO clutch, shut off the machine, and remove the ignition key.
Maintenance Instructions 1. Park the mower on a level surface with the engine stopped. The engine oil should be warm before draining. If not warm from operation, start the engine and run a few minutes to warm the oil. 2. Remove the dipstick and the oil drain plug and drain the oil into a suitable container. Be sure to allow ample time for complete drainage. LUBRICATION 8. Fill the crankcase through the oil filler tube (dipstick opening) with new, clean oil.
Maintenance Instructions Ident No. Lubrication Type No.
Maintenance Instructions LUBRICATION Chassis and Deck Lubrication Points 49
Maintenance Instructions LUBRICATION NOTE: In case the gearboxes are completely drained of oil, approximately 5 fl. oz. (15 cl) of oil per gearbox is required to refill the gear drive assembly. Mower Deck Gearbox Lubrication NOTE: These instructions apply to all mower decks with gear-driven blades. Refer to DSD52 or DSD62 Mower Deck Lubrication in this section for the DSD52 or DSD62 deck with belt-driven blades.
Maintenance Instructions 2. LUBRICATION Check the oil level in the belt drive gearbox every 100 hours (or sooner if a visible oil leak has developed). With the deck in the normal operating position, remove the level plug in the side of the gearcase. Add SAE E.P. (Extreme Pressure) 90W oil to maintain the oil level to the plug. If the oil level is low, check the gearbox for any indication of an oil leak. If an oil leak is noted, the gearbox will need to be removed and rebuilt. 3.
Maintenance Instructions LUBRICATION b. Hydrostatic Transmission Fluid If no fluid leaks from around the air bleed plug: Checking Hydrostatic Transmission Fluid Level * Slowly add fluid into the reservoir until fluid starts to leak from around the plug. (Transmissions are serviced from the factory with Mobil DTE 18M hydraulic oil. When it is necessary to add fluid, refer to Specifications for the proper fluid. Any of the listed fluids may be used.
Maintenance Instructions LUBRICATION/CLEANING 3. Reinstall the lower drain plug, making sure the rubber O-ring on the plug is in place and in good condition. 4. Refill the transmission through the air bleed plug hole until it is as full as possible. 7. CLEANING Engine Air Cleaner System There are three main components in the engine air cleaner system: a turbine precleaner, a Donaldson Radialseal™ air cleaner, and the standard Kohler engine air cleaner.
Maintenance Instructions CLEANING Turbine Precleaner The turbine precleaner is mounted on a remote air intake tube connected to the Donaldson air cleaner. A spinning fan driven by the intake airflow separates dust from the air, giving the initial stage of air cleaning. Dust particles are exhausted through a single small vent in the side of the housing. Since no dust is trapped, the precleaner operates without cleaning.
Maintenance Instructions 1. 2. 3. Release the top and bottom cover latches and remove the air cleaner cover. Wash the cover and Vacuator™ valve. Check that these components are in good condition. The Vacuator™ valve is subject to wear and deterioration and should be replaced yearly or when damaged. The lips of the valve should close and fit together; any cracks, deformation, or wear in the valve is cause for replacement. CLEANING 8.
Maintenance Instructions Kohler Air Cleaner (Secondary) NOTE: The Kohler Air Cleaner should only be serviced more often than a yearly interval if there are indications that the Donaldson Radialseal (primary) has failed. • Foam Precleaner An oiled, foam precleaner surrounds the paper element of the Kohler engine air cleaner system. Clean and re-oil the foam precleaner yearly or more often in dusty or dirty conditions. 1. Unscrew the air cleaner cover mounting nut and remove the air cleaner cover. 2.
Maintenance Instructions Paper Element Gasket Lightly Grease to Improve Sealing Action CLEANING DANGER Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow. Every 100 hours, inspect and clean the cooling fins (more often when operating in extremely dusty, dirty conditions). Remove the two (2) cooling fin access panels in the engine shroud and clean the cooling fins and external surfaces using compressed air.
Maintenance Instructions CLEANING NOTE: While some degree of material buildup in the mower deck housing can be tolerated, a point is finally reached where cutting quality deteriorates and clogging begins to occur because of too much buildup on the baffling and housing. Grass Buildup in Mower Housing Non-Tilting Decks DANGER Before raising or removing the mower deck for cleaning, stop the engine, remove the ignition key, and disconnect the spark plug wires. 1.
Maintenance Instructions CLEANING IMPORTANT: With the belt removed, the blower wheel must spin freely. Any binding or dragging of the wheel is an indication of dirt buildup. This buildup must be cleaned to avoid abrasive wear of the blower blades, excessive power loss and eventual loss of blower performance (clogging).
CLEANING/ CHECKING/SERVICING Maintenance Instructions Hydrostatic Transmission Cooling Fins CHECKING/SERVICING Keeping the cooling fins on the hydrostatic transmissions 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.
Maintenance Instructions 3. Replace filler caps. IMPORTANT: DO NOT overfill the battery. Electrolyte will overflow through the vented caps onto parts of the machine and WILL result in severe corrosion. Cleaning the Terminals If battery terminals are corroded, remove battery from the mower. Using a wire brush, remove corrosion with a solution of one part baking soda and four parts water. Rinse with clean water.
Maintenance Instructions CHECKING/SERVICING 6. 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. 4. 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 loosening and removing the nut, lock washer, and flat washer that mounts the blade. 5.
CHECKING/SERVICING/ REPLACING/REPAIRING Maintenance Instructions Mower Deck Gearbox Oil Seals The mower deck gearbox seals should be inspected every 25 hours for evidence of oil leaking; particularly the lower oil seal on the blade drive gearbox. This seal is protected by the trash guard on the blade hub and seal protector plate on the housing, but is still vulnerable to seal damage due to operating in an adverse environment.
Maintenance Instructions REPLACING/REPAIRING Jackshaft Drive Belt Engine PTO Belt GHS Blower Belt (GHS Model Only) Hydrostatic Ground Drive Belt Belt Locations 64
Maintenance Instructions REPLACING/REPAIRING Engine PTO Drive Belt (3 Groove Power Band) 1. c. Raise the clutch lever (engage position) to lift the clutch idler away from the belt. d. Next remove the belt from the engine pulley and then the PTO drive pulley. To remove the engine PTO drive belt: a. Remove the jackshaft drive belt from its idler pulley (by pushing down on idler pulley) and let the belt drop down out of the way. 2.
Maintenance Instructions REPLACING/REPAIRING Jackshaft Drive Belt 1. b. Relax the belt by depressing the springloaded idler arm. c. Roll the belt off the jackshaft pulley and remove. To remove the jackshaft drive belt: a. Remove the engine PTO drive belt, as described in previous section. Push Idler Pulley Down to Relax Belt Jackshaft Idler Pulley Jackshaft Drive Belt Engine Pulley Tension Spring Jackshaft Drive Belt (Disengaged) 2.
Maintenance Instructions REPLACING/REPAIRING GHS Blower Drive Belt 1. Remove the GHS blower drive belt by unhooking the belt tension spring from the hook on the chassis frame (located above the blower pulley). Lift the belt tightener idler pulley up and roll belt off the pulleys. Blower Drive Pulley Blower Pulley Chassis Frame Hook GHS Blower Drive Belt Spring Removed Belt Tightener Idler Pulley (Disengaged) GHS Blower Drive Belt Assembly (Disengaged) Blower Drive Belt Spring Removal 2.
Maintenance Instructions REPLACING/REPAIRING Hydrostatic Ground Drive Belt 1. To remove the hydrostatic ground drive belt: a. b. Slide belt off pulleys, then release the idler. Raise the spring-loaded belt tightener arm and idler pulley to relax belt. Belt Tightener Arm Jackshaft Idler Pulley Transmission Drive Pulley Spring Hydrostatic Ground Drive Belt Hydrostatic Ground Drive Belt Assembly (Disengaged) 2. Reverse the procedure to install the hydrostatic ground drive belt.
Maintenance Instructions REPLACING/REPAIRING Fuel Filter Model MT is equipped with an in-line fuel filter. Visually inspect the filter periodically, and replace the filter yearly. In-Line Fuel Filter Turn Valve Clockwise to Close Fuel Shut-Off Valve and Filter Blade Overload Shear Bolts NOTE: Shear bolts are not used on the DSD62 mower deck. 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 REPLACING/REPAIRING After reinstalling the blade, check blade timing by moving blades through one (1) complete revolution. Make sure blade tips pass clear of each other. If timing is incorrect, refer to Mower Deck Gearbox Replacement in this section. 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.
Maintenance Instructions REPLACING/REPAIRING NOTE: With oil flow throughout the unitized gear drive assembly; if one gearbox has internal damage or excessive wear, the remaining gearboxes and connector tubes should be completely disassembled and thoroughly flushed out with solvent before reassembly. 5. Drain and properly dispose of oil. 6. Remove the four (4) bolts mounting the gearbox to the connector tube and slide the gearbox off the splined drive shaft coupling. 7.
Maintenance Instructions 4. REPLACING/REPAIRING Remove the blower assembly from the chassis as follows: a. Remove the blower skid bar by removing front and rear mounting bolts from the skid bar (underneath the blower) and removing the bolt connecting the blower housing to the skid bar. b. Remove the blower belt tightener idler arm assembly by removing the pivot bolt. c. Remove two (2) bolts mounting the blower housing to the frame. d.
Maintenance Instructions ADJUSTMENTS ADJUSTMENTS DANGER If the engine must be running to perform a maintenance adjustment, keep hands, feet, and clothing from moving parts. DO NOT wear jewelry or loose clothing. Safety Switches There are three (3) safety interlock switches on the tractor. Use the panel nuts on the switch body to position the switch for proper activation of the switch.
Maintenance Instructions ADJUSTMENTS Blade Clutch (PTO) Clutch Engagement/Belt Tension The clutch engagement and PTO belt tension are adjusted using the clutch actuator rod. Initially, after installing a new PTO belt, after 10 hours and every 100 hours thereafter, check and adjust for the two dimensions in the clutch actuator rod as shown in the PTO Clutch Engaged and PTO Clutch Disengaged illustrations. Adjust the bolt head clearance [1/4 in. to 3/8 in. (6.35 mm to 9.
Maintenance Instructions ADJUSTMENTS Clutch Disengagement/Brake Action WARNING It is important to check and maintain blade brake action for safe operation of the machine. 2-1/8 in. (54 mm) 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. The blade brake is activated by the brake actuator rod linkage to the clutch idler pulley mechanism.
Maintenance Instructions ADJUSTMENTS Use the following procedures to check and adjust clutch disengagement and brake action: Stop Block Stop Block Eccentric Adjustment - Step 1 Use the stop block attached to PTO belt tightener arm to set the bottom position of the clutch idler pulley in the disengaged position. The stop block should contact the chassis to stop the clutch idler pulley from moving further down in the disengaged position.
Maintenance Instructions ADJUSTMENTS 2. Blade Clutch Idler Pulley 1/8 in. (3 mm) Stop Block PTO Belt Tightener After adjustments are complete, check blade brake action as described in CHECKING/SERVICING the Blade Brake Action in this section. If blades do not stop within five (5) seconds, check the following: a. Recheck 1/8 in. (3 mm) gap between stop block and chassis. b. Make sure clutch and brake linkage are working freely (no binding). c. Check the brake band lining. d.
Maintenance Instructions 3. ADJUSTMENTS Tighten the jam nut on the forward travel stop adjusting bolt. CAUTION NEVER attempt to disconnect any safety devices or defeat the purpose of these safety devices. Steering Lever Actuator Arms FSC Actuator Clevis Forward Travel Stop Bolt LH Steering Lever (For Orientation) Neutral Safety Switch Steering Adjustment Nut Forward Speed Control Stop and Steering Lever Adjustment Neutral Function Adjustment Steering Lever End Play Adjustment - Step 2 1.
Maintenance Instructions ADJUSTMENTS Straight Ground Travel Adjustment - Step 4 Forward Speed Control Friction Lock 1. Sit in the seat, start the engine (operate at normal speed), and with the FSC in the NEUTRALPARK position check for forward movement of either drive wheel (if either wheel moves backward, refer back to Neutral Function Adjustment - Step 3 and readjust). Tighten the steering lever adjustment nut on the side of the mower with the wheel moving forward until wheel movement stops.
Maintenance Instructions Tilt-Up Deck Adjustable Stop When the carrier frame hinge joint is properly adjusted, 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. On a level surface, if any pin is sticking up (likely the front pins), tighten the opposite side or loosen the existing side to lower the pin.
Maintenance Instructions 2. Preliminary Setting: Turn the idle mixture needle valve out (counterclockwise) 1-1/2 turns from the closed position. This initial adjustment will allow the engine to be started and warmed up prior to the final adjustment.
ADJUSTMENTS/ ELECTRICAL SYSTEM Maintenance Instructions WARNING DO NOT test the Grass-Pak® switch with the engine running. Projectiles CAN be thrown out of the grass delivery spout and CAN cause serious injury to bystanders or property damage. Delay Adjustment Screw Advance Grass-Pak® Switch Vane Adjustment ELECTRICAL SYSTEM Grass-Pak® Vane Switch For troubleshooting, refer to Wiring Diagram.
Maintenance Instructions ELECTRICAL SYSTEM Wiring Diagram - Model MT 83
Operator’s Notes 84
Operator’s Notes 85
Operator’s Notes 86
LIMITED WARRANTY FOR WALKER COMMERCIAL RIDER MOWER 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.
Lwa 104 LpA 96 OPERATOR Sound - Model MT20 Sound - Model MT25 Sound Test Sound Test Sound test conducted was in accordance with 79/113/EEC and was performed on 22 March 96 under the conditions listed: Lwa Sound test conducted was in accordance with 79/113/EEC and was performed on 22 March 96 under the conditions listed: General Condition: LpA General Condition: Clear o 95 o Temperature: 50 (F) 10 (C) Wind Speed: < 5 mph (< 8 kmh) Humidity: 52% 106 OPERATOR Barometric Pressure: 24.
