Introduction
Ford 3900 Utility Tractor
The Ford 3900 is a utility tractor produced between 1975 and 1981, designed to provide reliable performance for general agricultural and property maintenance tasks. It is built as a two-wheel-drive machine, offering a balance of stability and maneuverability for varied field operations.
Engine and Powertrain
The tractor is powered by a 175 cubic-inch (2.9 L) 3-cylinder liquid-cooled diesel engine. It generates a gross power output of 47 hp (35.0 kW) at a rated speed of 2000 RPM. The engine features an indirect injection fuel system and delivers 132.4 lb-ft (179.5 Nm) of torque at 1200 RPM, providing steady power for traction and implement operation.
Transmission and PTO
The powertrain includes a gear-type transmission with 8 forward and 2 reverse gears, utilizing a 280mm dry disc clutch. For implement operation, the tractor is equipped with an independent rear PTO. The PTO system operates at 540 RPM, which is achieved at an engine speed of 1800 RPM, allowing for consistent power delivery to driven equipment.
Hydraulics and Hitch
The Ford 3900 features a Category I rear hitch system equipped with both position and draft control, allowing for precise management of ground-engaging implements. The system provides a rear lift capacity of 3417 lbs (1549 kg), suitable for a wide range of standard utility attachments.
Chassis and Electrical
Built on a chassis with a 77.6-inch wheelbase, the machine weighs 4766 lbs (2161 kg). It is equipped with mechanical wet disc brakes and an optional mechanical rear differential lock for enhanced traction control. The electrical system operates at 12 volts, supported by a 128 AH battery and a 28-amp alternator to ensure consistent starting and operation of electrical components.
Conclusion
The Ford 3900 is a straightforward, durable utility tractor suited for farmers and collectors who require a dependable workhorse for standard agricultural duties. Its combination of mechanical simplicity, moderate lift capacity, and established power output makes it a practical choice for light-to-medium field and utility work.
Ford 3900 Manuals & Documentation
Download the manuals and documentation available for the Ford 3900: repair and workshop manuals, operator's handbooks, spare-parts catalogs and technical leaflets — free PDF files.
Archive documentation provided for reference, hosted by Tractor-Info.
Production Information of Ford, 3900
- Utility tractor
| Manufacturer | Ford |
|---|
Dimension and Tires Information of Ford, 3900
| Wheelbase | 77.6 inches [197 cm] |
|---|---|
| Weight | 4766 lbs [2161 kg] |
| Height (ROPS) | 90.6 inches [230 cm] |
| Length | 134.7 inches [342 cm] |
| Width | 73.2 inches [185 cm] |
| Standard tires (ag) | Front: 6.00x19. Rear: 12.4/11x36 |
|---|
Engine Specifications of Ford, 3900
- Ford
- Liquid-cooled
- Diesel
- 3-cylinder
| Oil capacity | 7.4 qts [7.0 L] |
|---|---|
| Starter volts | 12 |
| Fuel system | Indirect injection |
| Coolant capacity | 10.6 qts [10.0 L] |
| Compression | 16.3:1 |
| Rated RPM | 2000 |
| Air cleaner | Dry |
| Displacement | 175 ci [2.9 L] |
| Power (gross) | 47 hp [35.0 kW] |
| Bore/Stroke | 4.20x4.20 inches [107 x 107 mm] |
| Starter | Electric |
| Torque RPM | 1200 |
| Torque | 132.4 lb-ft [179.5 Nm] |
Transmission Information of Ford, 3900
Transmission variants 1
| Type | Gear |
|---|---|
| Oil capacity | 13.7 qts [13.0 L] |
| Gears | 8 forward and 2 reverse |
| Clutch | 280mm dry disc |
Mechanical Specs of Ford, 3900
- Two-wheel drive
- ROPS standard. Cab available.
- Mechanical wet disc brakes
| Differential lock(optional) | Mechanical rear |
|---|
Power Information of Ford, 3900
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540 (1.375) |
| Engine RPM | 540@1800 |
Three-Point Hitch of Ford, 3900
| Rear Type | I |
|---|---|
| Control | Position and draft control |
| Rear lift | 3417 lbs [1549 kg] |
Electrical System of Ford, 3900
| Charging system | Alternator |
|---|---|
| Battery AH | 128 |
| Charging amps | 28 |
| Battery volts | 12 |
Where it sits
With 47 HP, the Ford 3900 sits between 3430 (46 HP) and 641 (48 HP) in Ford's range. Its power puts it in the 31th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the Ford 3900 have?
The Ford 3900 delivers 47 HP.
What years was the Ford 3900 produced?
The Ford 3900 was produced in 1975-1981.
What engine does the Ford 3900 have?
The Ford 3900 is powered by a Diesel, 3-cylinder engine.
What transmission does the Ford 3900 use?
The Ford 3900 uses a Gear transmission.
How much does the Ford 3900 weigh?
The Ford 3900 weighs 4766 lbs [2161 kg].
Is the Ford 3900 4WD?
The Ford 3900 is available in 2WD.