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OWNER’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MDD (20.9 HP Diesel)
™
Please Read and Save These Instructions Effective Date: 12-01-03
For Safety, Read All Safety and Operation P/N 7000-6
Instructions Prior to Operating Machine Price $5.00
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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_____________ 25 HIGHLIGHTED INFORMATION _____________ 1 CONTROL IDENTIFICATION, GLOSSARY ____________________________ 1 LOCATION, AND FUNCTION _____________ 25 IDENTIFYING NUMBER LOCATIONS________ 1 Operating Controls ___________________ 25 ENGINE SERIAL NUMBER LOCATION ______ 2 Engine Throttle ______________________ 25 SERVICING OF ENGINE AND Forward Speed Control (FSC) __________ 26 DRIVETRAIN COMPONENTS __________
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Table of Contents Fuel Injection Nozzle Pressure__________ 64 Maintenance Instructions __________ 46 Fuel Valve Solenoid___________________ 64 MAINTENANCE SCHEDULE CHART _______ 46 Blade Brake Action ___________________ 65 IMPORTANT TIPS FOR CARE REPLACING/REPAIRING ________________ 65 OF THE KUBOTA ENGINE _______________ 47 Drive Belts __________________________ 65 Fuel System _________________________ 47 Engine PTO Drive Belt _______________ 67 Starting/Stopping_____________________ 47 Jacksha
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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 ser- vice requiring special training or tools be performed • POWERFIL spreads the mowed material by an authorized Walker Mower Dealer. There are throughout the interior of the grass catcher by several general practices to be aware of in the area an oscillating delivery spout. of safety. Most accidents associated with the
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General Information SERVICING OF ENGINE AND DRIVETRAIN Serial Number COMPONENTS 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 manu- facturer. Any unauthorized work done on these components during the w
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Specifications MDD MODEL ENGINE Manufacturer/Model Kubota D722, 3 Cyl., Diesel (Liquid Cooled) Displacement 44.0 cu. in. (722 cc) HP (@ 3600 RPM) 20.9 Max. RPM (No Load) 3800 Governed RPM 3600 Max. Torque [ft-lb (N·m) @ RPM] 34 (46.1) @ 2600 Idle RPM 1000 ± 50 Spark Plug Type N/A Spark Plug Gap N/A Crankcase Capacity 3.1 qts (2.9 liters) Crankcase Lubricant API CC/CD/CE Grade Oil Only with 10W-30 Viscosity or 30W above 77° F (25° C) Only Fuel Tank Capacity 5 Gallons (19 liters) Fuel Diesel Fuel
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Specifications MDD MODEL TRANSMISSION (continued) Service Brake Dynamic Braking through Hydrostatic Transmission Parking Brake Mechanical Pin Lock in Transmission Gear Neutral Transmission Release by Manual Dump Valve Final Drive Gear Drive Axle Transmission Fluid Factory Service Mobil 1 Synthetic Motor Oil (15W50) 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 Spe
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Specifications MDD MODEL DIMENSIONS (Tractor and Mower)* Length 91 in. (231 cm) Width 49 in. (124 cm) Height 44 in. (112 cm) Wheel Base (Tractor) 42-1/4 in. (107 cm) Tread Width (Tractor) 29-3/4 in. (76 cm) MOWER DECK Width of Cut SD/GHS 42 or 48 in. (107 or 122 cm) Cutting Height 1 to 4 in. (3 to 10 cm) Height Adjustment 7 Positions - 1/2 in. (1 cm) Increment Hitch Pins Installed in Multi-Position Deck Support Blade Size (Typical) 42 in. (107 cm) SD 22 in. (56 cm) 2 in. (5 cm) Center Overlap
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Specifications MDD MODEL DRIVE BELTS Engine PTO Walker P/N 7230 Jackshaft Drive Gates 3VX335 (P/N 6231) Ground Drive Walker P/N 7248 Blower (GHS Model) Gates 3VX280 (P/N 7234-1) GHS SYSTEM (Optional) Blower 4 x 10 x 1/4 in. (10 x 25 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 65 Gallons (246 liters)/7.0 Bushels
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Component Identification NOTE: Control Identification shown in Operating Instructions section. Catcher Door Turbine Safety Latch Grass Handling System Precleaner 9.5 Bushel Catcher Tilt-Up Spring Clip Latch Coun Counter terw wei eight ght S Sp pr riing ng an and P d Pr rotec otecti tive ve Cov Cove er r Transmission Control Rod Adjustment Nut (LH) Deck Support Pins Anti-Scuff and Height Adjustment Roller Hitch Pins Catcher Lift / Tilt-Up Dump Handle Deck Handle Fuel Tank and Cap Transmission Co
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Component Identification Catcher Door Gas Spring Protective Cover Removable Grass Catcher Door Catcher Screen Gas Spring (Not Visible) Catcher Exhaust Deflector Radiator Cap Radiator Catcher Lift / Dump Handle Instrument Panel Guard Catcher Door Instrument Panel Box (Shock Mounted) Catcher Door Handle Dump Plate Fuel Anti-Scuff Filter Roller Muffler and Radiator Tailpipe Left Hand Guard Coolant Drive Wheel Recovery Tank Radiator Tailwheel Fork Screen and Wheel Rear View and Left Side View 8
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Component Identification Muffler Air Cleaner Donaldson Cover Air Cleaner Tailpipe Overflow Hose Radiator Cap Air Restriction Indicator (Not Visible) Radiator Precleaner Tube Radiator Jackshaft Guard PTO Gearbox Dipstick GHS Blower Turbine Precleaner RH Transmission Lockout Lever RH Hydrostatic Transmission 40 Amp Circuit Breaker PTO Neutral Safety Clutch Lever Switch LH Transmission 30 Amp Lockout Lever Circuit Breaker Positive (+) LH Hydrostatic Battery Cable Transmission Battery Negative (-) B
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Component Identification Starter Motor Below Exhaust Water Temperature Oil Fill (Not Visible) Manifold Gauge Sender Cap Alternator Thermostat Housing and Thermostat Glow Plug(s) Water Pump Fuel Pickup Fan Motor Line Fuel Return Line Fuel Tank Radiator Screen Cap (Removable) Radiator Fan and Shield Air Intake Throttle Control Injection Engine Stop Lever Linkage Hose Linkage Lever Injectors Pump (Fuel Shut-Off Valve) Top View (Engine Compartment) 10
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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 points when the door is being closed. Also, and mow to the desired height. keep fingers and hands clear of the door frame. The door is held closed with springs and t
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Safety Instructions MAINTENANCE 11. Use genuine factory replacement parts. Substitute parts may result in product malfunc- 1. To prevent accidental starting of the engine tion and possible injury to the operator and/or when servicing or adjusting the machine, re- others. move the key from the ignition switch and dis- connect the electrical plug on the fuel shut-off 12. Use care when charging the battery or per- solenoid. forming maintenance on the battery and electri- cal system: 2. To reduce fi
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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. Adjacent to Blower Discharge Chute Each End of Mower Deck (5808) through Body (5804) Hydrostat Oil SD Deck Discharge Shield (5848) Front Body Adjacent to Reservoir (5810-2) R
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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. Jackshaft Support Adjacent to Dipstick (7827) Deck Gearbox Cover (5807-3) Deck Carrier Frame (8647) Gear Axle (5810-1) Deck Carrier Frame (8653) Deck Carrier Frame (5865) Cat
