International Harvester 3788
Power
189 hp[P] hp
Production
1980-1981
Engine
Turbocharged diesel, 6-cylinder
Transmission
Torque Amplifier
Drive
4WD
From the same series:
Introduction
International Harvester 3788: Four-Wheel Drive Tractor
The International Harvester 3788 is a heavy-duty four-wheel drive tractor produced between 1980 and 1981. Part of the manufacturer's articulated-style series, this machine was engineered for demanding agricultural applications requiring significant tractive effort.
Engine and Performance
The tractor is powered by the International Harvester DT-466B, a 7.6-liter, 6-cylinder turbocharged diesel engine. It features a liquid-cooling system and operates at a rated speed of 2500 RPM, delivering 189 horsepower. The cooling capacity is 32.2 liters, with an oil capacity of 18.9 liters.
Transmission and Drivetrain
The drivetrain utilizes a two-range power shift transmission providing 12 forward and 6 reverse gears. It includes a 356mm hydraulic dry disc clutch and the signature Torque Amplifier system, which allows for on-the-fly gear modulation under load. The tractor is equipped with hydrostatic power steering and hydraulic wet disc brakes for reliable stopping.
Hydraulics and PTO
The hydraulic system is of the closed-center type, providing a pump flow of 45.4 liters per minute (12 gpm) across two valves. The rear power take-off (PTO) is independent, operating at 1000 RPM at an engine speed of 2100 RPM. The rear hitch is classified as Category III.
Dimensions and Chassis
This four-wheel drive unit has a wheelbase of 279 cm and an overall length of 579 cm. The cab is standard, providing a total height of 294 cm. With a width of 258 cm and a ground clearance of 58 cm at the front axle, the tractor is configured with 18.4-38 agricultural tires on both front and rear axles.
Conclusion
With 2,496 units produced, the International Harvester 3788 represents a specialized workhorse for large-scale farming operations, favored for its robust engine displacement and reliable four-wheel drive traction.
Production Information of International Harvester, 3788
- Original price was $57,000 in 1981
- Four-wheel Drive (4WD) tractor
| Manufacturer | International Harvester |
|---|---|
| Total built | 2,496 |
Dimension and Tires Information of International Harvester, 3788
| Wheelbase | 110 inches [279 cm] |
|---|---|
| Clearance (front axle) | 23.2 inches [58 cm] |
| Height (cab) | 115.8 inches [294 cm] |
| Length | 228 inches [579 cm] |
| Clearance (rear axle) | 26.7 inches [67 cm] |
| Width | 101.6 inches [258 cm] |
| Ag front | 18.4-38 |
|---|---|
| Ag rear | 18.4-38 |
Engine Specifications of International Harvester, 3788
- International Harvester DT-466B
- Liquid-cooled
- Turbocharged diesel
- 6-cylinder
| Coolant capacity | 34 qts [32.2 L] |
|---|---|
| Displacement | 466 ci [7.6 L] |
| Idle RPM | 780-2750 |
| Bore/Stroke | 4.30x5.35 inches [109 x 136 mm] |
| Oil capacity | 20 qts [18.9 L] |
| Starter volts | 12 |
| Rated RPM | 2500 |
Transmission Information of International Harvester, 3788
Transmission variants 1
| Transmission | Torque Amplifier |
|---|---|
| Clutch | 356mm hydraulic dry disc |
| Type | Two-range power shift |
| Gears | 12 forward and 6 reverse |
Mechanical Specs of International Harvester, 3788
- Four-wheel drive
- Cab standard
- Hydraulic wet disc brakes
| Steering | Hydrostatic power |
|---|
Power Information of International Harvester, 3788
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 |
| Engine RPM | 1000@2100 |
Hydraulics Specifications of International Harvester, 3788
| Type | Closed center |
|---|---|
| Valves | 2 |
| Pump flow | 12 gpm [45.4 lpm] |
Three-Point Hitch of International Harvester, 3788
| Rear Type | III |
|---|
Electrical System of International Harvester, 3788
| Ground | Negative |
|---|---|
| Batteries | 2 |
| Batteries(optional) | 100 |
| Charging system | Alternator |
| Battery volts | 12 |
| Charging amps | 72 |
Where it sits
With 189 hp[P] HP, the International Harvester 3788 sits between 3588 (167 HP) and 6788 (200 HP) in International Harvester's range. Its power puts it in the 88th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the International Harvester 3788 have?
The International Harvester 3788 delivers 189 hp[P] HP.
What years was the International Harvester 3788 produced?
The International Harvester 3788 was produced in 1980-1981.
What engine does the International Harvester 3788 have?
The International Harvester 3788 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the International Harvester 3788 use?
The International Harvester 3788 uses a Torque Amplifier transmission.
Is the International Harvester 3788 4WD?
The International Harvester 3788 is available in 4WD.