International Harvester Tractor F12, F14, 012, 014, W12, W14, F20, F30, 1020, W30, W40 Service Manual

Technical Scope and Service Data for International Harvester Tractors

• Covers 1937–1940 International Harvester F12, F14, 012, 014, W12, W14, F20, F30, 1020, W30, and W40 tractors, including various axle and drivetrain configurations
• Third-party publication by Polar558, reproducing original factory service documentation
• Contains over 100 mechanical section diagrams, exploded-view illustrations, and comprehensive clearance data tables
• Downloads to your account within seconds of checkout
• Your order stays downloadable from your account for life
• Laid out for standard letter and A4 printing
• Full-text search finds any part number in seconds
• This 50-page manual serves as the primary technical reference for managing the engine, transmission, steering, and final drive assemblies of these classic International Harvester units

Component and System Documentation

This factory service publication provides technical summaries and overhaul references for the entire International Harvester F12 through W40 series line. Detailed segments address engine removal, cylinder head configuration, valve train timing, and governor synchronization. The text describes transmission overhaul, bull gear removal, and differential adjustment procedures, specifically detailing the variations between the 3-speed and 4-speed transmission types found across the model range. Cooling system maintenance, fan assembly, and water pump repair are also outlined alongside brake adjustment methodologies for both hand-lever and pedal-operated systems.

Specification and Reference Tables

Technical data sections provide vital reference values for overhaul and maintenance planning. Piston ring gaps, bearing clearances, and valve tappet specifications are tabulated by model series for immediate retrieval. Pressure relief valve settings are documented at 30–40 psi for most models, with specific spring load tests listed for the proper service of the hydraulic components. Final gear mesh and backlash values are specified, including clear instructions for interpreting tooth contact patterns using Prussian blue or red lead. Reference is only — always consult a certified technician before performing service on this equipment.

An official factory-style service publication covering the 1937–1940 International Harvester tractor lineup, documenting engine, drivetrain, cooling, and steering specifications for the F12, F14, F20, F30, 1020, W12, W14, W30, and W40 build series.