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

International Harvester operator’s manual P/N 1092 877 R7 covers the 454, 474, 475, 574 and 674 tractors, plus 2400 and 2500 Series A industrial tractors. Its scope is operation, scheduled maintenance, adjustments and basic troubleshooting, rather than full internal engine or transmission repair.

PDF Text Search, Diagram Detail and Page Count

Search and diagram detail: PDF text search is not available, and there are no embedded PDF bookmarks. Small wiring-diagram labels require zooming; some fine characters and lines remain faint or broken.

One printable English PDF with 135 pages, including the cover, 15 preliminary pages, the 118-page numbered manual and one duplicated cab-heater page.

Tractor Operation, Service and Control Adjustments

The following selected topics show the manual’s coverage. Other subjects include engine break-in and towing precautions.

• Engine and fuel service: Cylinder-head bolt tightening, valve-clearance adjustment, and separate CAV and Bosch fuel-filter replacement and bleeding procedures.

• Drive controls: Gear-drive clutch and range/gear-lever adjustments, plus hydrostatic Foot-N-Inch valve, forward/reverse pedal and dump-valve settings.

• Transmission and hydraulics: Fluid changes, filter replacement, bypass-screen cleaning and air purging after service, including the additional hydrostatic filter.

• Brakes and front axle: Hydraulic disc-brake bleeding, pedal and parking-brake adjustment, front wheel bearing cleaning and adjustment, and toe-in checks.

• Electrical equipment: Wiring diagram, component and wire-color legends, additional deluxe equipment, and safety-start, brake-light and parking-brake warning-switch adjustments.

• Implement operation: Three-point linkage position and draft control, raise/drop response, check-chain settings, drawbars and independent PTO operation.

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.

Engine Service and Fuel-System Differences

Valve-adjustment coverage separates warm-engine checks for the D-179, D-206 and D-239 from the cold-engine procedure for the D-212. Starting instructions distinguish Bosch BR and CR injection pumps and cover Thermostart and the optional ether Start Pilot.

Cylinder-head tightening illustrations accompany the warning that uneven tightening can distort the head and produce uneven gasket loading. Fuel-system notes 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.

Injection-pump adjustments and repair, along with precision injector servicing, are assigned to the International Harvester dealer.

Gear Drive and Hydrostatic Servicing

Tractor, engine and skidded-unit identification is explained, including suffix codes for drivetrain speed, bevel gearing and independent PTO configuration. Ground-speed tables distinguish the different drivetrain builds.

Hydrostatic instructions separate hand control from foot control and include checks before driving after transport or hydrostatic service. Step-by-step filter-service procedures distinguish the transmission/hydraulic filter from the additional hydrostatic filter and its check-valve arrangement.

Hydraulic Linkage and Attachment Installation

The linkage section 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, step-by-step fitting instructions cover the valve and pipework, followed by separate cylinder-mounting arrangements for the swinging drawbar and three-position drawbar, with or without 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.

Follow the manual’s safety precautions around rotating PTO equipment, raised implements and hydraulic components before operation or service.

Maintenance Planning and Fault Tracing

Cooling and intake maintenance covers radiator and transmission oil-cooler cleaning, cooling-system flushing, fan-belt replacement and dry air-cleaner element replacement. 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. 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.

The Fault Tracing tables pair symptoms with probable causes and remedies, helping owners separate routine checks from faults that call for dealer attention. Coverage includes hard starting, irregular running, smoke, overheating and oil-pressure problems, then extends to the transmission, PTO, remote hydraulics, brakes, steering and electrical equipment.

Examples of Belt-Tension and Toe-In Specifications

The fan-belt section specifies 19 mm (3/4 in) deflection, or 10 mm (3/8 in) on the 475, under an 11 kg (25 lb) load midway along the longest belt span.

The front-wheel alignment section specifies 5–8 mm (3/16–5/16 in) toe-in, expressed as the difference between rear and front rim measurements taken at hub height.