Introduction
UTB/Universal 643 Utility Tractor
The UTB/Universal 643 is a utility tractor produced in Brasov, Romania, between 1988 and 2004. Designed for versatility, this machine belongs to the 533 and 703 series, offering a robust platform for standard agricultural operations.
Engine Specifications
The tractor is powered by a 4-cylinder diesel engine with a displacement of 3.6 liters (219.4 ci). It delivers 64 hp (47.7 kW) at a rated speed of 2400 RPM. The engine utilizes a direct injection fuel system and is equipped with an oil bath air cleaner. It features a compression ratio of 17:1, with oil and coolant capacities of 10.0 liters and 14.0 liters, respectively.
Transmission and Drivetrain
The 643 model offers multiple transmission configurations to suit different operational needs. The standard setup is an 8-speed constant mesh transmission providing 8 forward and 2 reverse gears. Optional configurations include a 12-speed creeper transmission and an 8-speed shuttle shift transmission. The drivetrain is supported by a dry disc clutch, with mechanical differential lock and power steering as standard features.
Hydraulics and Hitch
The hydraulic system is of the open-center type, operating at a pressure of 2175 psi (150.0 bar) with a pump flow capacity of 9 gpm (34.1 lpm). It features one valve for implement control. The rear hitch is a Category II system equipped with both position and draft control, capable of a maximum lift capacity of 4630 lbs (2100 kg).
Dimensions and Weight
The tractor is built on an 89.4-inch wheelbase with an overall length of 149.2 inches. The 2WD version weighs 6192 lbs, while the 4WD version weighs 6889 lbs. Both models provide adjustable tread widths to accommodate various row spacing requirements, with the 4WD model featuring a height of 100.4 inches.
Conclusion
The UTB/Universal 643 serves as a dependable utility tractor for farmers requiring a simple, mechanical machine for general field work. Its range of transmission options and robust hydraulic capacity make it adaptable to diverse agricultural tasks within its power class.
Production Information of UTB Universal, 643
- Utility tractor
- Built in Brasov, Romania
| Manufacturer | UTB/Universal |
|---|---|
| Original price | $25,000 (2004) |
Dimension and Tires Information of UTB Universal, 643
| 4WD Front tread | 54.3 to 62.2 inches [137 to 157 cm] |
|---|---|
| Wheelbase | 89.4 inches [227 cm] |
| 4WD Weight | 6889 lbs [3124 kg] |
| 2WD Weight | 6192 lbs [2808 kg] |
| Length | 149.2 inches [378 cm] |
| Rear tread | 55.5 to 75.2 inches [140 to 191 cm] |
| 2WD Front tread | 55.1 to 78.4 inches [139 to 199 cm] |
| Height | 100.4 inches [255 cm] |
| 2WD Standard tires (ag) | Front: 6.00-16. Rear: 14.9R-28 |
|---|---|
| 4WD Standard tires (ag) | Front: 9.5/8-24. Rear: 12.4R-36 |
Engine Specifications of UTB Universal, 643
- Diesel
- 4-cylinder
| Oil capacity | 10.6 qts [10.0 L] |
|---|---|
| Starter power | 4.7 hp [3.5 kW] |
| Rated RPM | 2400 |
| Fuel system | Direct injection |
| Coolant capacity | 14.8 qts [14.0 L] |
| Compression | 17:1 |
| Rated RPM | 2400 |
| Air cleaner | Oil bath |
| Displacement | 219.4 ci [3.6 L] |
| Power | 64 hp [47.7 kW] |
| Displacement | 196.9 ci [3.2 L] |
| Bore/Stroke | 4.02x4.33 inches [102 x 110 mm] |
| Starter volts | 12 |
| Torque RPM | 1400 |
| Torque | 152 lb-ft [206.1 Nm] |
Transmission Information of UTB Universal, 643
Transmission variants 1
- Four gears (1-4) plus reverse (R) in two ranges (low and high).
| Type | Constant mesh |
|---|---|
| Oil capacity | 24.3 qts [23.0 L] |
| Gears | 8 forward and 2 reverse |
| Clutch | Dry disc |
Transmission variants 2
- Optional creeper adds a third range to the basic transmission.
| Type | Creeper |
|---|---|
| Gears | 12 forward and 3 reverse |
| Clutch | Dry disc |
Transmission variants 3
| Type | Shuttle |
|---|---|
| Gears | 8 forward and reverse |
- 8-speed constant mesh
- 12-speed creeper
- 8-speed shuttle
Mechanical Specs of UTB Universal, 643
- Two- or four-wheel drive
- Wet disc brakes
- Power steering
| Differential lock | Mechanical rear |
|---|
Power Information of UTB Universal, 643
| Rear PTO | Independent |
|---|---|
| Rear PTO(optional) | 1000@2400 |
| Rear PTO Type | 540/1000 |
| Engine RPM | 540@2160 |
Hydraulics Specifications of UTB Universal, 643
| Type | Open center |
|---|---|
| Pump flow | 9 gpm [34.1 lpm] |
| Pressure | 2175 psi [150.0 bar] |
| Valves | 1 |
Three-Point Hitch of UTB Universal, 643
| Rear Type | II |
|---|---|
| Control | Position and draft control |
| Rear lift | 4630 lbs [2100 kg] |
Electrical System of UTB Universal, 643
| Ground | Negative |
|---|---|
| Battery AH | 150 |
| Charging system | Alternator |
| Battery volts | 12 |
Where it sits
With 64 HP, the UTB Universal 643 sits between 533 (53 HP) and 703 (70 HP) in UTB Universal's range. Its power puts it in the 45th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the UTB Universal 643 have?
The UTB Universal 643 delivers 64 HP.
What years was the UTB Universal 643 produced?
The UTB Universal 643 was produced in 1988-2004.
What engine does the UTB Universal 643 have?
The UTB Universal 643 is powered by a Diesel, 4-cylinder engine.
What transmission does the UTB Universal 643 use?
The UTB Universal 643 uses a Constant mesh transmission.
How much does the UTB Universal 643 weigh?
The UTB Universal 643 weighs 6889 lbs [3124 kg].
Is the UTB Universal 643 4WD?
The UTB Universal 643 is available in 2WD/4WD.