Target Audience:
Do-it-yourself tractor owners and experienced mechanics
Benefits:
Saves money on repairs, increases understanding of tractor operation and maintenance
Content Highlights:
Comprehensive coverage, detailed illustrations, step-by-step guidance, troubleshooting assistance
Engine Systems:
Engine general, cooling system, fuel system, lubrication system
Powertrain Systems:
Transmission, clutch, differential lock, main drive bevel gears and differential, final drive, rear axle, front axle
Operational Systems:
Brakes, steering gear, power steering system, power take-off (PTO), hydraulic system
Body And Chassis:
Fenders, fuel tank & platform
Electrical Coverage:
Electrical system, wiring diagrams, troubleshooting
Maintenance Procedures:
Scheduled maintenance, fluid changes, lubrication, filter replacement
Repair Procedures:
Complete disassembly and reassembly of all major components
Diagnostic Procedures:
Troubleshooting common issues, electrical system diagnostics
Engine Overhaul:
Detailed procedures for engine disassembly, inspection, repair, and reassembly.
Transmission Rebuild:
Complete guidance for clutch, gearbox, and differential repairs.
Hydraulic System Repair:
Troubleshooting and repair of the tractor's hydraulic lift and control systems.
Electrical Troubleshooting:
Systematic approach to diagnosing and rectifying electrical faults with wiring diagrams.
Depth:
Detailed step-by-step instructions, hundreds of photos and illustrations, expanded substeps, notes, cautions, and warnings
Engine Type:
4-cylinder, gasoline or diesel (depending on specific WD variant)
Horsepower Range:
Approx. 30-40 PTO HP (varies by engine and configuration)
Fuel Delivery:
Carburetor (gasoline) or injection pump (diesel)
Cooling Method:
Water-cooled
Cylinder Block:
Cast iron construction
Pistons And Rings:
Specifications for sizing and fitting
Crankshaft And Bearings:
Tolerances and installation procedures
Valve Train:
Adjustment of valve tappets, camshaft and lifter specifications
Type:
Constant mesh, 4-speed forward, 1-reverse
Gear Selection:
Direct shifting
Gearbox Design:
Sliding gear type, splash lubricated
Clutch Type:
Single dry plate, diaphragm spring type (typical for later models)
Differential Lock Operation:
Engaging and disengaging procedures and maintenance
Operating Weight:
Approximately 4,000-4,500 lbs (varies by configuration)
Towing Capacity:
Varies greatly depending on implement and conditions; manual provides guidance on trailer hitch use.
Wheelbase:
Approximately 80 inches
Overall Length:
Approximately 130 inches (without implement)
Overall Width:
Adjustable tread width, typically around 60-80 inches depending on rear axle configuration
Safety Warnings:
Manual includes cautions and warnings for safe operation and maintenance
Braking System:
Mechanical drum brakes, foot-operated, and parking brake.
Operator Station:
Open station design, manual covers safe entry/exit and operation of controls.
Dashboard Features:
Basic gauges for oil pressure, coolant temperature, amperage, tachometer (may vary).
Advanced Features:
N/A (Tractor technology of its era is focused on mechanical operation).
Pto Operation:
540 RPM PTO, engagement and speed control procedures.
Hydraulic Capacity:
Capacity for the hydraulic reservoir will be detailed in the manual.
Hydraulic Pump Type:
Gear-driven hydraulic pump, details on rebuilding provided.
Engine Oil Change:
Refer to specific engine type and operating hours; typically 50-100 hours for heavy use.
Air Cleaner Service:
Frequent service required based on operating conditions, especially in dusty environments.
Coolant Flush:
Annually or as per manual's recommendation for radiator maintenance.
Engine Oil:
API Service Classification appropriate for diesel or gasoline engine, viscosity grade SAE 30 or 10W-30/15W-40 depending on temperature and engine type.
Hydraulic Fluid:
Allis-Chalmers Hy-Lift Hydraulic Fluid or equivalent (e.g., John Deere Hy-Gard, Case IH Hy-Tran) - consult manual for specific viscosity.
Transmission Fluid:
Refer to manual for specific type and viscosity, likely a tractor transmission oil (TTO) or hydraulic fluid.
Final Drive Oil:
Refer to manual for specific grade and type, typically EP (Extreme Pressure) gear oil.
Grease Points:
Comprehensive lubrication chart provided in the manual for all grease fittings.
Common Wear Points:
Clutch wear, transmission synchronization, hydraulic pump performance, carburetor issues (gasoline), injection pump issues (diesel), starter and generator wear.
Common Leaks:
Seal leaks in the transmission, rear axle, and hydraulic system.
Electrical Problems:
Generator charging issues, worn wiring insulation, distributor cap and rotor wear.
Manufacturer History:
Allis-Chalmers was a major American manufacturer of agricultural, construction, and industrial machinery.
Production Period:
The WD tractor was produced from 1948 to 1957, evolving from the earlier WD model.
Model Predecessor:
Allis-Chalmers Model B and Model C
Model Successor:
Allis-Chalmers WD45
Key Innovations:
Known for its 'All-Crop Harvester' heritage and robust design for its era.
