International Harvester
International Harvester 3788
The International Harvester 3788 is a four-wheel drive (4WD) farm tractor produced from 1980 to 1981 as part of the 30 2+2 Series. It features a turbocharged 7.6L 6-cylinder diesel engine (DT-466B) delivering an estimated 167.1 hp engine power, with claimed drawbar power of 146 hp and PTO power of 170.57 hp. The tractor includes a 12-speed two-range power shift transmission with a torque amplifier and hydrostatic power steering. It has a closed center hydraulic system with 2 valves and a 12 gpm pump flow. The 3788 rides on 18.4-38 tires front and rear, with a wheelbase of 110 inches and operating weight around 18,620 lbs. Standard features include a cab, hydraulic wet disc brakes, and an independent 1000 RPM rear PTO. Total production was 2,496 units, with an original price of $57,000 in 1981.
Power189 hp[P]
Founded1980 - 1981
Model3788
Technical Specifications
Detailed specifications and technical data for International Harvester 3788
Power
| PTO (tested) | 170.57 hp (127.2 kW) |
|---|---|
| PTO (claimed) | 170.57 hp (127.2 kW) |
| Drawbar (tested) | 142.05 hp (105.9 kW) |
| Drawbar (claimed) | 146 hp (108.9 kW) |
Tires
| Ag rear | 18.4-38 |
|---|---|
| Ag front | 18.4-38 |
Engine
| Type | turbocharged diesel |
|---|---|
| Model | International Harvester DT-466B |
| Cooling | liquid-cooled |
| Idle RPM | 780-2750 |
| Cylinders | 6-cylinder |
| Fuel tank | 90 gal (340.7 L) |
| Rated RPM | 2500 |
| Bore/Stroke | 4.30x5.35 inches (109 x 136 mm) |
| Displacement | 466 ci (7.6 L) |
| Oil capacity | 20 qts (18.9 L) |
| Starter volts | 12 |
| Coolant capacity | 34 qts (32.2 L) |
Weight
| Shipping | 16520 lbs (7493 kg) |
|---|---|
| Operating | 18620 lbs (8446 kg) |
| Max capacity | 23500 lbs (10659 kg) |
Dimensions
| Width | 101.6 inches (258 cm) |
|---|---|
| Length | 228 inches (579 cm) |
| Wheelbase | 110 inches (279 cm) |
| Height (cab) | 115.8 inches (294 cm) |
| Clearance (rear axle) | 26.7 inches (67 cm) |
| Clearance (front axle) | 23.2 inches (58 cm) |
Electrical
| Ground | negative |
|---|---|
| Batteries | 2 |
| Battery volts | 12 |
| Charging amps | 72 |
| Charging system | alternator |
Hydraulics
| Type | closed center |
|---|---|
| Valves | 2 |
| Pump flow | 12 gpm (45.4 lpm) |
Mechanical
| Cab | standard |
|---|---|
| Brakes | Hydraulic wet disc brakes |
| Steering | hydrostatic power |
| Four-wheel drive | Yes |
Production
| Type | Four-wheel Drive (4WD) tractor |
|---|---|
| Series | 30 2+2 Series |
| Total built | 2,496 |
| Manufacturer | International Harvester |
| Original price | $57,000 in 1981 |
| Years produced | 1980 - 1981 |
Transmission
| Type | two-range power shift |
|---|---|
| Gears | 12 forward and 6 reverse |
| Clutch | 356mm hydraulic dry disc |
| Transmission | Torque Amplifier |
Tractor hitch
| Rear Type | III |
|---|
Power Take-off (PTO)
| Rear PTO | independent |
|---|---|
| Engine RPM | 1000@2100 |
| Rear PTO Type | 1000 |
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