International Harvester Tractor F12, F14, 012, 014, W12, W14, F20, F30, 1020, W30, W40 Factory Service Manual (P/N C4077-90960)
50 Pages • 43.42 MB • Instant, Printable PDF
International Models Covered & Key Technical Specifications
Models: International Harvester F12, F14, 012, 014, W12, W14, F20, F30, 1020, W30, W40
Sub-models / Variants: Non-adjustable axle, Adjustable axle, Dual wheel tricycle, Single wheel tricycle
Model Years: 1937–1940
Serial Numbers: F12: FS81837–117517, F14: FS124000–139606, F20: FA68749–148810, F30: FB18684-up, 1020: KC210235–214885, W12: WS2768–4133, W14: WS4134–5296, W30: WB15095–32482, W40: WKC5120–7665
Technical Data:
- Engine configuration: 4-cylinder, overhead valve
- Cooling system capacity: 3.5–12 gallons (model dependent)
- Lubrication: Splash or pressure systems
- Transmission: 3 or 4 forward speeds
- Steering: Worm and worm wheel gear mechanism
- Clutch types: Spring-loaded or over-center type
International Manual Features & Content Preview
- Covers 1937–1940 International Harvester F12, F14, O12, O14, W12, W14, F20, F30, 1020, W30, and W40 tractors, detailing various axle and drivetrain configurations
- OEM Publication Number: C4077-90960
- Includes over 100 mechanical cross-sections, exploded-view illustrations, and comprehensive clearance data tables
- 50-page technical reference detailing engine, transmission, steering, and final drive assemblies
Component and System Documentation
This factory service publication outlines the exact technical specifications and overhaul references for the entire 1937–1940 International Harvester tractor lineup. It breaks down complex assemblies for mechanics and serious DIYers. You will find detailed sections on engine removal, cylinder head configuration, valve train timing, and governor synchronization. The manual also describes transmission rebuild parameters. It maps out bull gear removal and differential adjustments, specifically noting the critical variations between the 3-speed and 4-speed transmissions used across these series. Cooling system maintenance, fan assembly, and water pump components are thoroughly covered. Finally, it details the factory brake adjustment methodologies for both hand-lever and pedal-operated systems.
Specification and Reference Tables
Accurate technical data is the backbone of any successful restoration or major mechanical repair. This section provides the vital reference values needed for precise engine and drivetrain planning. Piston ring gaps, bearing clearances, and valve tappet specifications are systematically tabulated by model series for quick lookup in the shop. You get exact pressure relief valve settings, documented at 30–40 psi for most models, alongside specific spring load tests for evaluating hydraulic components. Final gear mesh and backlash values are fully specified. The text even explains how to properly interpret tooth contact patterns using Prussian blue or red lead. Working on vintage heavy equipment carries inherent risks. Always ensure you follow standard shop safety practices and consult a certified heavy machinery technician before undertaking major powertrain overhauls.
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