1939-1952 Farmall A/B/AV/BN International A U-2 Service Manual (64 P.)
Complete 4-cylinder engine, transmission, and electrical service specifications — ignition timing, carburetor adjustment, fuel system, cooling, lubrication, and drive train procedures. Publication form CHS-27.
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Sample pages from the 1939-1952 Farmall A/B/AV/BN International A U-2 Service Manual (64 P.) manual
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Farmall Models Covered & Key Technical Specifications
Models: Farmall A, Farmall B, Farmall AV, Farmall BN, International A Industrial Tractor, U-2 Power Unit
Sub-models / Variants: 4-wheel, 3-wheel, high-clearance, industrial
Trade Names: Farmall, International
Build Years: 1939–1952
Serial Numbers: Farmall A: FAA-501 and up, Farmall AV: FAAV-48562 and up, Farmall B: FAB-3675 and up, Farmall BN: FAB-48349-X7 and FABN-48459 and up, International A: IAA-57284 and up, U-2: UAA-501 and up
Technical Data:
- Engine displacement: 113 cubic inches
- Engine configuration: 4-cylinder, 3x4-inch valve-in-head
- Governed engine speed: 1400 rpm (tractors), 1800 rpm (U-2 power unit)
- Cooling system capacity: 3-3/8 gallons
- Transmission oil capacity: 1-1/2 gallons
- Cylinder head stud torque: 65 ft. lb.
- Main bearing bolt torque: 75 ft. lb.
- Connecting rod bolt torque: 40 ft. lb.
Farmall Manual Features & Content Preview
1939–1952 Farmall A, B, AV, BN and International A Technical Manual
- Covers 1939–1952 Farmall A, B, AV, BN tractors and International A industrial units, plus U-2 power plant variations
- Original OEM publication from International Harvester, documenting factory-specified tolerances and clearances for the 113 cubic-inch 4-cylinder engine
- Contains 80 individual technical illustrations, including exploded views of the engine, transmission, and differential assemblies
- Delivered as a direct download the moment payment clears
- Suitable for printing individual sections for shop-floor use
- Indexed PDF search covers every chapter and appendix
- This 64-page document remains the authoritative source for the standard 1400 rpm governed speed and factory-recommended torque values for the A-series tractor line
Documented Systems and Assembly Data
The 1939–1952 Farmall A, B, AV, BN and International A service manual provides detailed technical breakdown across all critical tractor systems. Chapters document the internal engine components including wet-type cylinder sleeves, connecting rod specifications, and crankshaft Tocco-hardened bearing surfaces. Fuel system documentation details both Zenith and Marvel Schebler carburetor operation, including float level settings and main jet calibration for gasoline and kerosene/distillate fuel options. Electrical sections provide clear wiring diagrams for the starter and Delco-Remy lighting systems.
Engine and Chassis Specification Preview
Additional data includes transmission and differential overhaul parameters, specifically documenting the selective sliding gear four-speed arrangements. Cylinder head bolt torque is specified at 65 ft. lb. in the engine data section. The transmission case capacity is documented at 1-1/2 gallons. Cooling system capacity for these units is specified at 3-3/8 gallons. Reference only — always consult a certified technician before performing service on this equipment. This 64-page official International Harvester service publication provides definitive specifications and assembly reference data for the 1939–1952 Farmall A, B, AV, BN and International A tractor series.
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