Farmall H & 4 Series Tractors Service Manual
Complete coverage for Farmall H, HV, W-4, O-4, I-4, U-4, and IU-4 tractors. Details engine, transmission, brakes, and more. Publication GSS-5032.
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Farmall Models Covered & Key Technical Specifications
Models: Farmall H, Farmall HV, W-4, O-4, OS-4, I-4, U-4, IU-4
Sub-models / Variants: Orchard, Grove, Industrial, Power Unit, Engine-Over-Axle
Trade Names: Farmall, International Harvester, McCormick-Deering
Serial Numbers: H & HV: FBH-501 & up, W-4: WBH-501 & up, O-4: OBH-696 & up, I-4: IBH-1478 & up, U-4: UBH-501 & up, IU-4: IUBH-501 & up
Technical Data:
- Engine displacement: 152 cu. in.
- Governed speed: 900–1650 r.p.m. (Farmall H, HV, W-4, O-4, IU-4), 900–1800 r.p.m. (U-4)
- Compression ratio: 4.50 (kerosene), 4.75 (gasoline-distillate), 5.90 (high-compression gasoline)
- Transmission type: Selective spur gear, 5 forward speeds, 1 reverse
- Clutch type: 10-inch spring-loaded or overcenter
- Electrical system: 6-volt positive ground
- Cooling system capacity: 4-1/4 U.S. gallons
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Farmall H & 4 Series Tractor Service Documentation
- Covers 1939–1954 International Harvester Farmall H, HV, W-4, O-4, OS-4, I-4, U-4, and IU-4 tractors and power units, documenting core mechanical, lubrication, and electrical systems
- Official International Harvester GSS-5032 service publication, published for agricultural equipment division service training
- Contains 56 individual specification tables for engine, transmission, steering, and clutch systems plus extensive cross-sectional diagrams and exploded-view visual references
- File link appears in your order confirmation straight away
- OCR text layer lets you jump to a torque spec by keyword
- Laid out for standard letter and A4 printing
- This 67-page factory manual serves as the primary technical reference for maintaining the 152 cubic-inch 4-cylinder engine and associated chassis components common to the entire Farmall H and 4 Series product line
Component and System Technical Scope
The 1939–1954 Farmall H and 4 Series service manual provides detailed data on the engine, cooling, fuel, and electrical systems. Topics documented include cylinder head assembly, piston and connecting rod tolerances, camshaft bearing specifications, and magneto timing procedures. It also details the steering gear, differential assembly, bevel gear adjustments, and brake maintenance intervals.
Technical Specification Previews
This manual includes precise tolerance charts and fluid capacities to support maintenance. Cylinder head stud torque is specified at 70 ft.lb., while main bearing cap bolts require 75 ft.lb. of torque. Fluid capacity for the transmission and differential case is documented at 6-1/2 gallons. The cooling system is documented at 4-1/4 gallons, and the oil capacity is listed at 6 quarts. For deeper insight into service procedures, see what an OEM service publication covers.
Reference only — always consult a certified technician before performing service on this equipment.
An official 67-page International Harvester OEM workshop manual covering the Farmall H and 4 Series tractors, documenting engine, chassis, electrical, and cooling system specifications for the complete 152 cubic-inch 4-cylinder line.
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