| Manufacturer |
International Harvester |
| Price |
- |
| Model |
624 |
| Equipment Type |
Utility Tractors |
| Factory |
Neuss, Germany |
INTERNATIONAL HARVESTER 624 POWER
ENGINE DETAIL
The International Harvester 624 features a robust D-206 diesel engine with a 16:1 compression ratio, delivering 58 hp at 2100 RPM and a peak torque of 147 lb-ft at 1600 RPM, ideal for moderate fieldwork requiring efficient power output. The direct injection system enhances fuel efficiency while its liquid-cooled design supports optimal operating temperatures, but maintenance of the cooling system, with a capacity of 16.4 quarts, is essential for longevity. Operators should monitor valve clearances (0.010 inches intake, 0.012 inches exhaust) for peak performance, particularly in demanding agricultural applications.
| Description |
International Harvester D-206 diesel 4-cylinder liquid-cooled |
| Displacement |
206.4ci / 3.4L |
| Bore/Stroke |
3.875x4.38inches / 98x 111mm |
| Power |
58hp / 43.3kW |
| Fuel system |
direct injection |
| Compression |
16:1 |
| Rated RPM |
2100 |
| Idle RPM |
650-2310 |
| Torque |
147lb-ft / 199.3Nm |
| Torque RPM |
1600 |
| Firing order |
1-3-4-2 |
| Starter volts |
12 |
| Coolant capacity |
16.4qts / 15.5L |
| Intake valve clearance |
0.010inches / 0.254mm |
| Exhaust valve clearance |
0.012inches / 0.305mm |
ENGINE OIL
The International Harvester 624 tractor has an oil capacity of 9 quarts (8.5 liters), requiring regular oil changes every 200 operating hours to maintain optimal performance and prevent engine wear. A well-maintained oil system enhances engine longevity and efficiency, but neglecting this schedule may lead to decreased performance or engine damage. Regular monitoring of oil quality and adhering to change intervals is crucial in agricultural operations to ensure reliability in demanding conditions.
| Oil capacity |
9qts / 8.5L |
| Oil change |
200 h |
INTERNATIONAL HARVESTER 624 ENGINE
The International Harvester 624 tractor is powered by a 3.4L 4-cylinder diesel engine, offering a balance of fuel efficiency and power for various agricultural tasks. With an 18.5-gallon (70.0 L) fuel tank, it provides extended operational capability, reducing downtime for refueling during demanding work. However, the relatively small engine size may limit performance in high-draft applications, so consider the terrain and load requirements when selecting this model.
| Description |
International Harvester 3.4L 4-cyl diesel |
| Fuel tank |
18.5gal / 70.0L |
TRANSMISSIONS OVERVIEW
The International Harvester 624 tractor features an 8-speed transmission with an optional 12-speed partial power shift, enhancing operational versatility and efficiency across various field conditions. The power shift capability allows for smoother gear transitions under load, which can improve productivity during tasks such as plowing or crop harvesting. However, users should be aware of potential maintenance needs associated with the complexity of the partial power shift system.
| Description |
8-speed 12-speed partial power shift |
TRANSMISSION 1
The International Harvester 624 features a partially synchronized transmission, allowing smooth gear shifts between its 8 forward and 4 reverse gears but requiring the tractor to be stopped for range changes. Its oil capacity of 45.2 quarts (42.8 liters) supports reliable operation and cooling, vital for prolonged use under load. Ideal for moderate agricultural tasks, its transmission design may pose challenges in time-sensitive applications due to the necessity of stopping for range shifts.
| Transmission |
partially synchronized |
| Gears |
8 forward and 4 reverse |
| Oil capacity |
45.2qts / 42.8L |
| Description |
Four gears (1-4) in high, low, and reverse ranges. Gear shifting is synchronized using the clutch. Tractor must be stoppped to shift range |
SPEEDS 1
| Description |
With 16.9x30 rear tires |
TRANSMISSION 2
The International Harvester 624 tractor features a partial power shift transmission, offering 12 forward and 4 reverse gears, making it versatile for various agricultural tasks. The Agriomatic S system's ability to provide undershift in high range and overshift in low range enhances operational efficiency, especially in varied terrain. With a 40 qt oil capacity, proper maintenance is critical to ensure optimal transmission performance and longevity, while the power shuttle functionality in reverse allows for improved maneuverability in tight spaces.
| Transmission |
Agriomatic S |
| Type |
partial power shift |
| Gears |
12 forward and 4 reverse |
| Oil capacity |
40qts / 37.9L |
| Description |
The Agriomatic S provides an additional four forward speeds selected by a right-hand power shift lever. Pushing the lever forward engages the Agriomatic range, while rearward uses the conventional range. The Agriomatic speeds are between high and low ranges, so this provides an undershift in high range and an overshift in low range. In reverse range it operates as a power shuttle |
SPEEDS 2
| Description |
With 16.9x30 rear tires |
MECHANICAL
The International Harvester 624 tractor features a versatile drivetrain with options for 2WD or 4WD, enhancing traction in varied terrain while the foot-operated differential lock improves maneuverability in challenging conditions. Its available 8-speed or 12-speed partial power shift transmission provides flexibility in speed selection, making it suitable for diverse farming tasks, though the open operator station may expose the operator to weather elements. Prospective users should consider the trade-off between enhanced stability in 4WD and potentially higher fuel consumption.
| Chassis |
4x2 2WD/4x4 MFWD 4WD |
| Differential lock |
foot-operated |
| Brakes |
disc |
| Cab |
Open operator station |
| Transmissions |
8-speed 12-speed partial power shift |
HYDRAULICS
| Pump flow |
7.5gpm / 28.4lpm |
TRACTOR HITCH
| Rear Type |
II/I |
| Control |
position and draft control |
| Rear lift |
3748lbs / 1700kg |
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540/1000 |
INTERNATIONAL HARVESTER 624 TIRES
The International Harvester 624 tractor features standard agricultural tire sizes of 7.50-16 (front) and 13-30 (rear) for 2WD models, enhancing maneuverability in tight spaces but may limit traction in challenging terrains. The 4WD variant, with 10-24 (front) and 14-34 (rear) tires, provides superior traction and stability on uneven ground, making it more suitable for heavy-duty applications and hilly landscapes. Choosing the right tire configuration can significantly influence the tractor's performance, with wider rears in 4WD scenarios improving load-bearing capacity and reducing soil compaction.
| Standard tires (ag) |
Front: 7.50-16. Rear: 13-30 (2WD) Front: 10-24. Rear: 14-34 (4WD) |
| Ag rear |
11-36/12-36/14-30/14-34 |
DIMENSIONS
| Wheelbase |
83.5inches / 212cm |
| Length |
131.6inches / 334cm |
| Width |
71.5inches / 181cm |
| Height (steering wheel) |
62inches / 157cm |
| 2WD Weight |
5732lbs / 2600kg |
| 4WD Weight |
6592lbs / 2990kg |
| Ground clearance |
16inches / 40cm |
| Front tread |
52 to 67.75inches / 132to 172cm |
| Rear tread |
55.9 to 71.7inches / 141to 182cm |
DIMENSIONS & TIRES
The International Harvester 624 tractor features a wheelbase of 83.5 inches, providing stable handling, especially in tight field conditions. Weighing between 5,732 to 6,592 pounds, this model offers a solid balance of durability and traction, beneficial for various agricultural applications. However, with its 2WD configuration, it may face challenges in slippery or uneven terrains, limiting performance compared to 4WD alternatives.
| Wheelbase |
83.5inches / 212cm |
| Weight |
5732 to 6592 pounds |
| Front tire |
7.50-16 |
| Rear tire |
13-30 (2WD) |
624 SERIAL NUMBERS
| Location |
Right side of tractor, mid-frame |
| 1965 |
NT 800001 |
| 1967 |
NT 809456 |
| 1968 |
NT 813620 |
| 1969 |
NT 818263 |
| 1970 |
NT 822042 |
| 1971 |
NT 824048 |
| 1972 |
NT 824720 |
ELECTRICAL
| Charging system |
Bosch generator |
| Charging amps |
11/16 |
| Battery volts |
12 |
