1942 May 15th Willys Truck TM-10-1513 U.S. Government Maintenance Manual

The Willys MB ¼-ton 4x4 truck was produced for the U.S. Government and is covered in the TM-10-1513 maintenance manual, which was issued on May 15, 1942. The manual also references the Ford GPW, which was produced under a separate contract but shared interchangeable parts with the Willys MB.
The Willys MB and Ford GPW were both produced primarily during World War II (1941-1945), with production starting in 1941 and continuing until 1945.

The document is a maintenance manual for the Willys MB ¼-ton 4x4 military truck, detailing technical specifications, lubrication guidelines, operational instructions, and service procedures. It includes information on engine specifications, clutch adjustments, axle maintenance, and lubrication schedules, ensuring proper vehicle operation and longevity.

Summary of the Document
General Information

•    Willys MB ¼-ton 4x4 truck maintenance manual for U.S. Government use.

•    Covers both Willys and Ford GPW models due to part interchangeability.
Technical Specifications

•    Engine: 4-cylinder, 134.2 cu. in., 60 HP at 4000 RPM.

•    Dimensions: 80” wheelbase, 132¾” length, 62” width, 40” height to cowl.

•    Capacities: 15-gallon fuel tank, 5-quart engine oil, 11-quart cooling system.
Operational Guidelines

•    Break-in period: Max 40 mph for first 100 miles, 50 mph up to 500 miles.

•    Pre-operation checks: Radiator, oil, fuel, battery, brakes, and steering.

•    Starting procedure: Engage handbrake, set gear to neutral, turn ignition key.
Maintenance & Lubrication

•    Lubrication schedule: Regular checks for engine, transmission, axles, and steering.

•    Lubricants: SAE 80 for transmission, SAE 10W for winter engine oil.

•    Brake system: Hydraulic, requires periodic fluid checks and bleeding.
Unloading & Transport

•    Shipping configurations: 1-6 vehicles per freight car, secured with blocks and straps.

•    Unloading steps: Remove blocks, straps, and chains, then roll or lift vehicles.
Controls & Instruments

•    Ignition switch: Turn key right to start, left to stop engine.

•    Light switch: Push-pull type, includes blackout mode for military use.

•    Speedometer & gauges: Monitor speed, fuel, oil pressure, and engine temperature.
Repair & Service Tools

•    Special tools required: Kent-Moore tools for engine, axles, clutch, and transmission repairs.

•    Common adjustments: Brake pedal, clutch, wheel bearings, and steering gear.

•    Willys MB ¼-Ton 4x4 Truck: A maintenance manual for the U.S. government vehicle, covering specifications, lubrication, and repair procedures.

•    Engine & Performance: Gasoline engine, 134.2 cu. in. displacement, 15.6 horsepower, and a 6.48:1 compression ratio.

•    Capacities & Fluids: Fuel tank holds 15 gallons, engine oil capacity 5 quarts, and cooling system 11 quarts.

•    Driver Instructions: Avoid exceeding 40 mph for the first 100 miles; max speed 50 mph up to 500 miles.

•    Lubrication & Maintenance: Regular inspections and lubrication required for engine, transmission, axles, and steering components.

•    Unloading & Handling: Vehicles transported in freight cars, secured with blocks and straps, requiring careful removal.

•    Special Tools: Various specialized tools listed for engine, transmission, and axle maintenance.

•    Operational Precautions: Check oil, coolant, battery, brakes, and tire pressure before operation.

The Willys MB ¼-Ton 4x4 Truck manual is structured into several key sections, including:

1.    Introduction and General Information – Overview of the vehicle, specifications, and operating instructions.

2.    Lubrication and Maintenance – Guidelines for regular servicing, lubrication points, and recommended fluids.

3.    Engine and Mechanical Systems – Detailed descriptions of the engine, transmission, and drivetrain components.

4.    Driving and Operating Instructions – Procedures for shifting gears, using the transfer case, and operating the vehicle safely.

5.    Electrical System – Wiring diagrams, lighting, ignition system, and battery maintenance.

6.    Special Tools and Equipment – Listing of tools required for repairs and servicing.

7.    Troubleshooting and Repairs – Common mechanical issues and their solutions.

8.    Appendices and Diagrams – Reference tables, schematic diagrams, and additional technical details.

This structure ensures comprehensive coverage of the vehicle’s operation, maintenance, and repair.

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