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OWNER’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MC (20 HP)
™
Please Read and Save These Instructions Effective Date: 03-01-07
For Safety, Read All Safety and Operation P/N 6000-13
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. Every customer is important to us. Your satisfaction is our goal. Please. . .read this manual thoroughly! This manual is to be used in conjunction with the engine manufacturer's manu
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Table of Contents General Information ________________ 1 Operating Instructions_____________ 24 HIGHLIGHTED INFORMATION _____________ 1 CONTROL IDENTIFICATION, GLOSSARY ____________________________ 1 LOCATION, AND FUNCTION _____________ 24 IDENTIFYING NUMBER LOCATIONS________ 1 Ignition Switch _______________________ 24 ENGINE SERIAL NUMBER LOCATION ______ 2 Engine Choke________________________ 24 SERVICING OF ENGINE AND Engine Throttle ______________________ 25 DRIVETRAIN COMPONENTS __________
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Table of Contents REPLACING/REPAIRING ________________ 58 Maintenance Instructions __________ 41 Drive Belts __________________________ 58 MAINTENANCE SCHEDULE CHART _______ 41 Engine PTO Drive Belt _______________ 60 IMPORTANT TIPS FOR CARE Jackshaft Drive Belt _________________ 61 OF THE KOHLER ENGINE _______________ 42 GHS Blower Drive Belt _______________ 62 Fuel System _________________________ 42 Hydrostatic Ground Drive Belt _________ 63 Starting/Stopping_____________________ 42 Fuel Filt
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General Information HIGHLIGHTED INFORMATION • POWER TAKE-OFF (PTO) transmits engine power to run the cutter blades and GHS blower. Walker Manufacturing recommends that any service ® requiring special training or tools be performed by • POWERFIL spreads the mowed material an authorized Walker Mower Dealer. There are sev- throughout the interior of the grass catcher by eral general practices to be aware of in the area of an oscillating delivery spout. safety. Most accidents associated with the
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General Information SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS 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, autho- rized servicing agent of the component manufactur- er. Any unauthorized work done on these components during the
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Specifications MODEL MC ENGINE Manufacturer/Model Kohler Command CH20, 2 Cyl., Gasoline (Air-Cooled) Displacement 38.1 cu. in. (624 cc) HP (@ 3600 RPM) 20.0 Max. RPM (No Load) 3750 Governed RPM 3600 Max. Torque [ft-lb (N·m) @ RPM] 32 (43) @ 2500 Idle RPM 1200 ± 75 ® Spark Plug Type Champion RC12YC Spark Plug Gap .030 in. (.76 mm) Crankcase Capacity 2 qts (1.9 liters) Crankcase Lubricant API SG, SH, SJ or higher Grade Oil Only with 10W-30 Viscosity above 0° F (-18° C), or 5W-20 or 5W-30 Viscosit
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Specifications MODEL MC TRANSMISSION (continued) Neutral Transmission Release by Manual Dump Valve Final Drive Gear Drive Axle Transmission Fluid Factory Service Mobil 1 Synthetic Motor Oil (15W-50) Alternate Transmission Fluid SAE 30W Straight Viscosity Motor Oil Transmission Fluid Capacity 1 qt (1 liter) Transmission Cooling Cooling Fan Mounted on Drive Pulley Ground Travel Speed Forward m.p.h. (km/h) 0-5 (0-8) Infinitely Variable Reverse m.p.h. (km/h) 0-5 (0-8) Infinitely Variable BLADE DR
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Specifications MODEL MC DIMENSIONS (continued) Width 36 in. (91 cm) SD Model 41-3/4 in. (106 cm) (with Deflector) 42 in. (107 cm) SD Model 47-3/4 in. (121 cm) (with Deflector) 36 in. (91 cm) GHS Model 37 in. (94 cm) 42 in. (107 cm) GHS Model 43 in. (109 cm) Height SD Model 37-1/2 in. (95 cm) GHS Model 49-1/2 in. (112 cm) Wheel Base (Tractor) 42-1/4 in. (107 cm) Tread Width (Tractor) Standard Tires 28-1/4 in. (72 cm) Optional Tires 29-3/4 in. (76 cm) MOWER DECK Width of Cut SD/GHS 36 or 42 in. (9
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Specifications MODEL MC DRIVE BELTS Engine PTO Walker P/N 8230 Jackshaft Drive Gates 3VX385 (or Walker P/N 6251-1) Ground Drive, Micro-V Walker P/N 7248 Blower (GHS Model) Walker P/N 7234-1 GHS SYSTEM (Optional) Blower 4-1/2 x 10-1/2 x 1/2 in. (11 x 27 x 1 cm) Three-Blade Paddle Wheel (Driven by Mower Engine) Blower Brake Band Brake (Works in Combination with PTO Clutch, Stops Blower within Five (5) Seconds of PTO Disengagement) Max. Blower Speed 3600 RPM Grass Catcher Capacity* 89 Gallons (335
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Component Identification NOTE: Control Identification shown in Operating Instructions section. Turbine Grass Handling System Catcher Door Precleaner 9.5 Bushel Catcher Safety Latch Tilt-Up Latch Spring Clip Counterweight Spring and Protective Cover Transmission Control Rod Adjustment Nut (LH) Anti-Scuff Roller Deck Support Pins and Height Adjustment Catcher Lift / Hitch Pins Dump Handle Fuel Tank and Cap Transmission Control Rod Adjustment Nut (RH) Deck Support Arms Footrests Deck Lift Handle
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Component Identification Removable Grass Catcher Exhaust Catcher Screen Deflector (Not Visible) Catcher Door Gas Spring Catcher Door Gas Spring Protective Cover Catcher Lift / Dump Handle Catcher Door Catcher Door Handle Anti-Scuff Roller Muffler Oil Left Hand Oil Drain Tailpipe Filter Drive Wheel Plug Tailwheel Fork and Wheel Rear View and Left Side View 8
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Component Identification Air Restriction Indicator Air Cleaner Donaldson (Not Visible) Rubber Bumper Cover Air Cleaner Rubber Bumper (Body Support) (Body Support) Muffler Fuel Pump Air Intake Hose Muffler Heat Shield Precleaner Throttle and Tube Choke Linkage Oil Fill/ Fuel Tank Cap Dipstick Jackshaft PTO Gearbox Dipstick GHS Blower Turbine Precleaner RH Hydrostatic Transmission RH Transmission Lockout Lever Neutral Safety Switch PTO Clutch Lever LH Hydrostatic Transmission Positive (+) Battery
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Safety Instructions Pay particular attention to any information labeled Walker Manufacturing cannot predict every poten- DANGER, WARNING, CAUTION, IMPORTANT, tially dangerous situation. Therefore, items labeled and NOTE in this manual. as such in this manual do not cover all conceivable situations. Any person using procedures, tools, or When you see the Safety Alert Symbol ( ), control techniques not recommended by Walker read, understand, and follow the instructions. Fail- Manufacturi
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Safety Instructions 6. Do not wear loose fitting clothing that could get 12. The electrical system battery contains sulfuric caught in moving parts. Do not operate this acid. Avoid any contact with skin, eyes, and machine while wearing shorts; always wear clothing. Keep the battery and acid out of reach adequate protective clothing, including long of children. pants. Wearing safety glasses, safety shoes, OPERATING and a helmet is advisable and required by some local ordinances and insurance
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Safety Instructions 9. Watch for holes, rocks, and roots in the terrain 17. For GHS equipped models, use care when and for other hidden hazards. When mowing closing the grass catcher door. Keep fingers tall grass, mow higher than desired to expose and hands away from the hinge and pinch any hidden obstacles. Then, clean the area and points when the door is being closed. Also, mow to the desired height. keep fingers and hands clear of the door frame. The door is held closed with springs and
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Safety Instructions 2. To reduce fire hazards, keep the engine free of c. Keep sparks, flames, and smoking materi- grass, leaves, excessive grease, and dirt. als away from the battery at all times. To avoid sparks, use care when removing bat- 3. Keep all nuts, bolts, and screws tight to ensure tery cables from posts. the machine is in a safe, working condition. Check the blade mounting nuts frequently, mak- d. Disconnect both battery cables before ing sure they are tight. unplugging any wiring
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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 Manual. Each End of Mower Deck (5808) Adjacent to Blower Discharge Chute through Body (5804) Engine Shroud (5855) SD Deck Discharge Shield (5848) Rear of Grass Catcher Exhaust Screen
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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 Manual. Top of Blower Housing (5819) Deck Gearbox Cover (5807-3) Jackshaft Support Adjacent to Dipstick (7827) Deck Carrier Frame (5865) Right Side of Body (5806) Deck Carrier Frame
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Assembly Instructions SETUP INSTRUCTIONS Dry Battery Service Walker Mowers are shipped partially assembled. DANGER After uncrating the tractor and mower deck, initial setup is required. Activating a battery can be dangerous. NOTE: During the process of unpacking, any dam- The battery should be taken to a reliable aged or missing parts should be noted and reported service station, battery store, or power to the delivering carrier immediately (put in writing equipment dealer where a trained techni
