International Harvester 624 Overview
The International Harvester 624 is listed from 1965 through 1972 with a 206.4 cu in (3.4 L) direct-injection diesel. Published data identifies both 8F/4R and 12F/4R drivetrain entries, including partially synchronized and Agriomatic S descriptions, so matching the fitted transmission is important before any service or parts decision.
The 624 is listed with independent 540/1000 PTO, mechanical rear differential lock, and 7.5 gpm hydraulic-pump flow. The 2WD and 4WD published weights are different, which is another reminder that one 624 specification should not be treated as universal without checking the tractor's configuration.
The manual links below provide operator, engine-service, and parts-catalog routes. Match the serial number, engine, transmission, loader or hitch equipment, and drive configuration before relying on a procedure or ordering a part.
International Harvester 624 Quick Answers
- What engine is in an International Harvester 624?The International Harvester 624 is listed with a 206.4 cu in (3.4 L) direct-injection diesel, a 16:1 compression ratio, and a 2,100-rpm rated speed.
- Which transmissions were offered?Published 624 information includes 8-forward, 4-reverse and 12-forward, 4-reverse entries, with partially synchronized and Agriomatic S descriptions. Confirm the installed transmission before using a capacity, service detail, or parts reference.
- What PTO does the IH 624 use?The 624 is listed with an independent rear PTO and 540/1000 PTO speeds. Confirm the actual shaft and PTO equipment before selecting or setting up an implement.
- What hydraulic flow is listed for the 624?Published specifications list 7.5 gpm (28.4 L/min) hydraulic-pump flow. Installed valves, hitch equipment, and loader equipment should be checked on the individual tractor.
- How much does an IH 624 weigh?Published dimensions list 5,732 lb (2,600 kg) for the 2WD tractor and 6,592 lb (2,990 kg) for the 4WD tractor. Ballast and equipment can change the actual working weight.
- Which manuals are useful for an IH 624?The sources below include a 624/724/824 operator-manual listing, a 624 engine-service-manual listing, and a 624/724 diesel parts-catalog listing. Match the exact tractor, engine, loader, and serial coverage before relying on any of them.
Engine and Power
The 624 is listed with a 206.4 cu in (3.4 L) direct-injection diesel at 2,100 rpm and a published 16:1 compression ratio. The engine listing gives a rated engine output of 58 hp and 147 lb-ft of torque at 1,600 rpm. Match engine identification and serial information before applying any service detail.
Diesel engine
| Displacement | 206.4 ci 3.4 L |
|---|---|
| Power | 58 hp 43.3 kW |
| Fuel System | direct injection |
| Compression | 16:1 |
| Rated Rpm | 2100 |
| Torque | 147 lb-ft 199.3 Nm |
| Torque Rpm | 1600 |
| Coolant Capacity | 16.4 qts 15.5 L |
Manufacturer
Manufacture years
Transmission
The published record contains 8F/4R and 12F/4R entries, with partially synchronized and Agriomatic S descriptions. These are configuration choices, not one interchangeable 624 drivetrain; identify the installed transmission first.
partially synchronized
| Name | partially synchronized |
|---|---|
| Gears | 8 forward and 4 reverse |
Agriomatic S
| Name | Agriomatic S |
|---|---|
| Type | partial power shift |
| Gears | 12 forward and 4 reverse |
PTO and Hitch
The 624 is listed with independent 540/1000 rear PTO. PTO shaft and installed equipment can differ, so the tractor itself is the final check before an implement or parts decision.
Rear PTO
Rear PTO type
Rear hitch
Rear lift
Hydraulics
Published data lists 7.5 gpm (28.4 L/min) hydraulic-pump flow and mechanical rear differential lock. Verify the individual tractor's valves, hitch, and loader equipment before hydraulic diagnosis or parts work.
Pump flow
Fluids, Battery, and Service Facts
Published capacities list an 18.5 gal (70.0 L) fuel tank, 9 qt (8.5 L) of engine oil, and 16.4 qt (15.5 L) of coolant. The operator-manual listing describes operating, adjusting, maintenance, and troubleshooting coverage; use the complete matching manual for fluid grades, service intervals, and fill procedures.
Fuel tank
Engine oil capacity
Battery volts
Tires and Dimensions
Tire and dimension values can vary by wheel, axle, and configuration.
Wheelbase
Length
Electrical
Electrical rows are included when documented.
Battery volts
Manuals and Documents
The linked operator-manual listing covers International 624, 724, and 824 tractors and provides a visible table of contents for controls, PTO, hydraulics, maintenance, and adjustments. It is a useful literature route, not a substitute for the complete manual matched to the exact tractor.
Separate engine-service and 624/724 diesel parts-manual listings are also linked. They must be checked against the engine, transmission, loader or hitch equipment, and serial number before use.
Operator manual
- International Harvester 624, 724, and 824 operator manualoperation, maintenance, and specifications
Commercial 58-page operator-manual listing with a visible contents list. Match serial number and configuration before use.
View operator manual
Service manual
- International Harvester 624 engine service manualoperation, maintenance, and specifications
Commercial 624 engine-service-manual listing. Confirm exact engine and serial coverage before use.
View engine service manual
Parts catalog
- International Harvester 624/724 diesel parts manualparts matching
Commercial illustrated-parts-manual listing with loader coverage. Verify the exact tractor and loader before ordering.
View parts manual
Parts Checks Before Ordering
Record the serial number, engine, 2WD or 4WD configuration, installed transmission, PTO equipment, hydraulic valves, hitch or loader, and wheel equipment before looking up a part. A 624 model name does not resolve those combinations.
The 624/724 diesel parts-manual listing includes front-loader coverage, so it is useful for identifying an assembly family. It is not proof that a part fits every 624; verify complete catalog coverage and tractor configuration before ordering.
- International Harvester 624/724 diesel parts manualCommercial illustrated-parts-manual listing for 624/724 diesel tractors with front-loader coverage. Match the serial number, tractor, and loader before treating a listing as fitment.View parts manual
Accuracy Note
Tractor specifications can vary by year, region, factory configuration, installed equipment, and later repairs. Match serial range, engine, transmission, PTO setup, and model code before ordering parts or doing service work.