International Harvester 100, Hydro 186, 1466, 1468, 1486, 1566, 1586 Hydro and Gear-Drive Tractor Shop Manual Series

• Covers 1970s–1980s International Harvester Hydro 100, 186, 1466, 1468, 1486, 1566, 1568, and 1586 tractors, detailing both standard gear-drive and hydrostatic drive configurations.
• Complete 126-page factory-authorized specifications for the IH DT436 and DV-550B diesel engine series.
• Packed with over 250 exploded-view diagrams, wiring schematics, gear-train clearance charts, and torque-specification tables.

Component and System Documentation

When you are tearing down a 6- or 8-cylinder IH diesel, guesswork doesn't cut it. This documentation maps out the exact mechanical context for piston and sleeve replacement, cylinder head service, and fuel injection timing. The manual covers the entire powertrain, providing clear breakdowns of everything from the clutch and torque amplifier linkages to the range transmission and final drive planetary units. Auxiliary systems, including the front-wheel-drive transfer case and hydrostatic pump assemblies, are thoroughly detailed. Always ensure heavy equipment is properly supported and hydraulic systems are fully depressurized before cracking into lines, relying on these OEM specs for a safe reassembly. And because this manual is an instant download, you won't lose momentum waiting for shipping.

Specification Highlights

Need exact numbers for the rebuild? We have you covered. The manual lists specific main bearing diametral clearances ranging from 0.0018 to 0.0051 inches and confirms main bearing bolt torque at 130 ft.-lbs. for consistent engine reassembly. Cooling system capacities are documented by model (26 to 30 quarts). You will also find critical diesel fuel system compression pressures—rated at 385–415 PSI for the Hydro 100 series—along with precise pump timing data for all Bosch American and Robert Bosch configurations. Valve clearance, hot engine timing, and detailed tolerance charts for crankshaft main journals and camshaft diameters are all clearly indexed.