International Farmall M, MD, 6 Series Tractor Factory Service Manual, 1950-1958 (P/N GSS-5033)
138 Pages • 11.16 MB • Instant, Printable PDF
International Models Covered & Key Technical Specifications
Models: International Farmall M, International Farmall MV, International Farmall MD, International Farmall MDV, International W-6, International WD-6, International T-6, International TD-6, International O-6, International OS-6, International ODS-6, International I-6, International ID-6, International IU-6, International IUD-6, International U-6, International UD-6
Sub-models / Variants: Wheel Tractors, Crawler Tractors, Power Units, Orchard Tractors, Grove Tractors, Industrial Tractors, Tractor-Engine-Over-Axle Units
Model Years: 1940s–1950s (Production era associated with GSS-5033 manual)
Serial Numbers: Farmall M: FBK 501 and up, Farmall MV: FBKV 58712 and up, Farmall MD: FBDK 26145 and up, Farmall MDV: FBDKV 101494 and up, W-6: WBK 501 and up, WD-6: WDBK 516 and up, 0-6: OBK 811 and up, OS-6: OBKSM 501 and up, ODS-6: ODEBK and up, I-6: IBK 2062 and up, ID-6: IDBK 2685 and up, T-6: TBK 528 and up, TD-6: TDBK 501 and up, U-6: UBK 501 and up, UD-6: UDBK 501 and up, IU-6: IUBK 1195 and up, IUD-6: IUDBK 906 and up
Technical Data:
- Engine Displacement: 247.7 cu. in. (carbureted and Diesel variants)
- Compression Ratios: 4.50:1 to 5.65:1 (carbureted), 14.2:1 (Diesel)
- Governed Speed: 1450–1500 rpm full load
- Cylinder Head Stud Torque: 110 ft.-lb.
- Main Bearing Torque: 100–150 ft.-lb. (depending on model variant)
- Connecting Rod Nut Torque: 55–85 ft.-lb. (depending on model variant)
- Flywheel Bolt Torque: 65 ft.-lb.
- Cooling System Capacity: 6 to 10.5 gallons (model dependent)
- Engine Oil Capacity: 8 to 9 quarts
International Manual Features & Content Preview
- Original 138-page OEM publication (International Harvester GSS-5033 Service Manual)
- Covers the International Farmall M, MD, and 6 Series, including Crawler T-6/TD-6, Orchard O-6/OS-6/ODS-6, and U-6/UD-6 Power Units
- Contains 90+ technical diagrams, highlighting exploded-view illustrations of the carburetor, oil pump, fuel system, and steering clutch
- Provides factory-authorized diagnostic and maintenance parameters specifically for these classic tractors and power units
Mechanical and Fuel System Documentation
Tearing down a classic Farmall requires precise tolerances, not guesswork. This factory publication delivers the in-depth technical documentation needed to maintain both carbureted and Diesel engine configurations within their original design limits. It directly addresses the internal components of the power plant. You will find complete specifications for cylinder liners, piston ring gaps, valve lever clearances, and camshaft bearings.
Working on high-pressure fuel lines and heavy engine internals carries inherent physical risks. Always follow standard shop safety practices and verify system pressure drops before beginning any teardown or adjustment.
Beyond the engine block, the text breaks down the ignition system, focusing heavily on magneto maintenance. It also maps out the fuel system to clarify the function and service requirements of the Model E-12 carbureted components and the single-plunger Diesel injection pump.
Specification Highlights
Having the right reference data on the shop floor saves hours of searching. Detailed tables provide torque values, fluid capacities, and gear speed specifications across the entire series.
Need the cylinder head stud tension? It is clearly listed at 110 ft.-lb. Depending on your specific engine configuration, main bearing cap nut torque ranges between 100 and 150 ft.-lb. For Diesel setups, the fuel injection nozzle opening pressure sits precisely at 700 psi.
The documentation also covers standard operational data like tire tread widths and PTO speeds. Intake valve clearance is set to 0.017 inches. Coolant system capacities run between 6 and 10.5 gallons, while the T-6 crawler tractor oil pump pressure is specified at 60 to 70 psi at governed speed.
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