International 454, 474, 475, 574, 674, 2400 & 2500 Series A Tractor 1970s Operator's Manual (PN 1092 877 R7)

• Covers International 454, 474, 475, 574, and 674 tractors, plus 2400 and 2500 Series A industrial tractors. International Harvester operator’s manual 1092 877 R7, supplied as a 135-page PDF.
• Engine maintenance covers cylinder-head bolt tightening and valve-clearance adjustment, with separate CAV and Bosch fuel-filter replacement and bleeding procedures.
• Drivetrain adjustments address the gear-drive clutch, range and gear levers, and hydrostatic Foot-N-Inch valve, forward/reverse pedals, and dump valve.
• Transmission and hydraulic servicing includes fluid changes, filter replacement, bypass-screen cleaning, and air purging after service, including the additional filter used on hydrostatic tractors.
• Brake and front-axle maintenance covers hydraulic disc-brake bleeding, pedal and parking-brake adjustment, front wheel bearing cleaning and adjustment, and toe-in checks.
• Electrical coverage provides a wiring diagram with component and wire-color legends, identifies additional deluxe equipment, and explains safety-start, brake-light, and parking-brake warning-switch adjustments.

Written for tractor owners and operators, this manual explains daily operation and routine care. Its troubleshooting tables distinguish owner checks from problems requiring dealer repair. Always review these factory-specified safety procedures before operating heavy machinery or inspecting hydraulic components to prevent severe injury.

Engine and transmission versions

Technical data is broken down for each model variant: D-179 engines in the 454/2400, D-206 in the 474, D-212 in the 475, and D-239 in the 574/2500 and 674. The engine sections distinguish warm-engine valve checks for the D-179, D-206, and D-239 from the cold-engine procedure for the D-212. Starting instructions also distinguish Bosch BR and CR injection pumps and cover Thermostart and the optional ether Start Pilot.

Tractor, engine, and skidded-unit identification is explained, including suffix codes for drivetrain speed, bevel gearing, and independent PTO configuration. Transmission coverage separates standard gear drive, optional Torque Amplifier, and the full forward/reverse arrangement offered for the industrial models. Hydrostatic instructions distinguish hand control from foot control and include checks before driving after transport or hydrostatic service.

Hydraulic linkage and attachment installation

The three-point linkage section explains position and draft control, raise and drop response, and check-chain settings for implement sway. It distinguishes reversible Category 1/2 lower links from the Category 2-only linkage on the 674. Single- and double-acting auxiliary valves and self-sealing couplings receive their own operating coverage.

For the 674 linkage assister ram, the attachment section contains valve and pipework installation instructions and separate cylinder-mounting arrangements for the swinging drawbar and three-position drawbar, including versions with an automatic hitch. Optional cable-operated rear drum brakes have separate adjustment instructions. Other attachment coverage includes the belt pulley, air-cleaner safety element, and roof-mounted cab heater.

Scheduled service, fault tracing, and reference tables

Maintenance sections cover the cooling system and air intake filtration, including radiator and transmission oil-cooler cleaning, cooling-system flushing, fan-belt replacement, and dry air-cleaner element service. The lubrication guide distinguishes engine-oil requirements from IH Hy-Tran transmission and hydraulic fluid requirements. Storage and return-to-service procedures are also included.

The Lubrication Chart and Routine Servicing Schedule organize recurring work. Ground-speed tables distinguish drivetrain builds, while wheel-track adjustment charts and front and rear tire load/inflation tables support wheel setup and ballasting. Reference specifications include fluid capacities, injection timing, nozzle identification, PTO speeds, and component-specific torque values.

Cylinder-head tightening illustrations accompany the warning that uneven tightening can distort the head and produce uneven gasket loading. Fuel-system notes also explain the risk of injection-pump damage when the engine is cranked with an empty fuel system, because the pump depends on fuel for lubrication.

The Fault Tracing section pairs symptoms with probable causes and remedies. It addresses hard starting, irregular running, smoke, overheating, and oil-pressure problems, then extends to the transmission, PTO, remote hydraulics, brakes, steering, and electrical equipment.

The manual’s scope is operation, scheduled maintenance, adjustments, and basic troubleshooting. Full internal engine and transmission repair procedures are outside its scope. Injection-pump repair and precision injector servicing are assigned to the International Harvester dealer.