| Manufacturer |
UTB/Universal |
| Price |
25,000(USD) |
| Model |
643 |
| Equipment Type |
- |
| Factory |
Brasov, Romania |
VARIANTS
UTB/UNIVERSAL 643 POWER
ENGINES OVERVIEW
The UTB/Universal 643 tractor features a robust 3.6L 4-cylinder diesel engine, providing higher torque output suitable for heavy-duty applications compared to the 3.2L 4-cylinder diesel variant. Key advantages include excellent fuel-efficiency and the ability to handle various attachments with its hydraulic lift capacity. However, the 3.6L engine may present challenges in maintenance cost and complexity due to its size and power, making it ideal for extensive agricultural operations while requiring diligent upkeep.
| Description |
UTB 3.6L 4-cyl diesel 3.2L 4-cyl diesel |
ENGINE DETAIL 1
The UTB Universal 643 is powered by a robust 4-cylinder, 3.6L liquid-cooled diesel engine with a direct injection fuel system, ensuring efficient fuel combustion and optimal power output of 64 hp at 2400 RPM. With a torque rating of 152 lb-ft achievable at a low 1400 RPM, it excels in applications requiring high pulling power, making it suitable for heavy-duty tasks such as tillage or hauling. However, the oil bath air cleaner and relatively high compression ratio of 17:1 may necessitate routine maintenance to prevent intake restrictions and ensure reliable performance in various operating conditions.
| Description |
UTB diesel 4-cylinder liquid-cooled |
| Displacement |
219.4ci / 3.6L |
| Bore/Stroke |
4.016x4.331inches / 102x 110 mm |
| Power |
64hp / 47.7kW |
| Fuel system |
direct injection |
| Air cleaner |
oil bath |
| Compression |
17:1 |
| Rated RPM |
2400 |
| Torque |
152 lb-ft /206.1 Nm |
| Torque RPM |
1400 |
| Starter volts |
12 |
| Starter power |
4.7hp / 3.5kW |
ENGINE DETAIL 2
The UTB/Universal 643 tractor features a robust 3.2L diesel engine with a 4-cylinder configuration, which provides balanced power and efficiency for various agricultural tasks. With a rated RPM of 2400, this tractor is optimal for day-to-day operations, striking a good balance between torque and fuel efficiency. However, operators should be mindful of maintenance needs related to its older design and ensure compatibility with existing attachments for optimal performance.
| Description |
diesel/4-cylinder |
| Displacement |
196.9ci / 3.2L |
| Rated RPM |
2400 |
UTB/UNIVERSAL 643 ENGINES
The UTB/Universal 643 tractor is equipped with either a 3.6L or 3.2L 4-cylinder diesel engine, providing versatility in power output. The fuel tank capacity of 16.4 gallons (62.1 liters) ensures extended operational duration, making it suitable for both agricultural work and larger land maintenance tasks. However, users should be aware that fuel consumption may vary significantly between the two engine options, impacting operational cost depending on workload demands.
| Description |
UTB 3.6L 4-cyl diesel 3.2L 4-cyl diesel |
| Fuel tank |
16.4gal / 62.1L |
TRANSMISSIONS OVERVIEW
The UTB/Universal 643 tractor features an 8-speed constant mesh transmission coupled with a 12-speed creeper and an 8-speed shuttle, providing versatile speed options for various agricultural tasks. The constant mesh design enhances durability and minimizes gear engagement wear, while the creeper allows for low-speed operations, ideal for precise fieldwork. However, the complexity of the transmission system may require more maintenance and operator training to fully utilize its capabilities.
| Description |
8-speed constant mesh 12-speed creeper 8-speed shuttle |
TRANSMISSION 1
The UTB/Universal 643 tractor features a constant mesh transmission with 8 forward and 2 reverse gears, providing versatility for various agricultural tasks. The dry disc clutch enhances reliability but may require careful adjustment to prevent slippage under heavy loads. In scenarios demanding both low-speed torque and high-speed travel, the dual-range system allows efficient operation while accommodating different field conditions.
| Type |
constant mesh |
| Gears |
8 forward and 2 reverse |
| Clutch |
dry disc |
| Description |
Four gears (1-4) plus reverse (R) in two ranges (low and high). |
SPEEDS 1
| Description |
With 16.9-30 rear tires |
TRANSMISSION 2
The UTB/Universal 643 tractor features a creeper transmission, expanding its operational versatility with 12 forward and 3 reverse gears, ideal for low-speed tasks like plowing or planting. The dry disc clutch enhances durability and reduces maintenance compared to fluid clutches but may require more effort at engagement. This tractor is particularly beneficial for specialized applications where precision and control at reduced speeds are necessary.
| Type |
creeper |
| Gears |
12 forward and 3 reverse |
| Clutch |
dry disc |
| Description |
Optional creeper adds a third range to the basic transmission. |
SPEEDS 2
| Description |
With 16.9-30 rear tires |
TRANSMISSION 3
The UTB/Universal 643 features a shuttle transmission with 8 forward and reverse gears, allowing for enhanced versatility in various agricultural applications. This setup enables smooth transitions between forward and reverse, improving operational efficiency, especially in tasks like plowing or maneuvering in tight spaces. However, operators may face a learning curve with gear selection to optimize performance under varying load conditions.
| Type |
shuttle |
| Gears |
8 forward and reverse |
MECHANICAL
The UTB/Universal 643 tractor features a robust 4x4 MFWD (Mechanical Front-Wheel Drive) option, enhancing traction in challenging conditions, ideal for varied agricultural applications. Its mechanical rear differential lock provides improved performance in slippery terrains by redistributing torque, while the hydrostatic power steering ensures ease of maneuverability. However, users should note that although the wet disc brakes offer reliable stopping power, they may require more maintenance compared to traditional systems, especially in heavy-duty uses.
| Chassis |
4x2 2WD/4x4 MFWD 4WD |
| Differential lock |
mechanical rear |
| Steering |
hydrostatic power |
| Brakes |
wet disc |
| Transmissions |
8-speed constant mesh/12-speed creeper/8-speed shuttle |
HYDRAULICS
| Type |
open center |
| Pressure |
2175psi / 150.0bar |
| Valves |
1 |
| Pump flow |
9 gpm /34.1 lpm |
TRACTOR HITCH
| Rear Type |
II |
| Control |
position and draft control |
| Rear lift |
4630lbs / 2100kg |
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540/1000 |
UTB/UNIVERSAL 643 TIRES
The UTB/Universal 643 tractor, with an Ag front tire combination of 11L-15/9.50-24 and Ag rear tire size 16.9R30, provides a balanced traction and stability for a variety of field applications. The 4WD system enhances performance on uneven terrain, improving power transfer and minimizing soil compaction. However, the specific tire sizes should be matched to the task at hand to avoid potential challenges in ground disturbance or inefficiencies in fuel consumption during operation.
| Ag front |
11L-15/9.50-24 (4WD) |
| Ag rear |
16.9R30 |
DIMENSIONS
| Wheelbase |
89.37inches / 226cm |
| Length |
149.2inches / 378cm |
| Height |
100.4inches / 255cm |
| Weight |
6200lbs / 2812kg |
| 2WD Front tread |
55.1 to 78.4inches / 139to 199 cm |
| 4WD Front tread |
54.3 to 62.2inches / 137to 157 cm |
| Rear tread |
55.5 to 75.2inches / 140to 191 cm |
DIMENSIONS & TIRES
The UTB/Universal 643 tractor features a wheelbase of 89.37 inches, providing enhanced stability and maneuverability for diverse agricultural tasks. With a weight of 6200 lbs, it offers good traction, but may require adequate horsepower for best productivity, especially on uneven terrain. The combination of tire sizing (11L-15 front and 16.9R30 rear) suggests suitability for both fieldwork and transport, yet may limit performance on soft or muddy surfaces due to potential sinking.
| Wheelbase |
89.37inches / 226cm |
| Weight |
6200lbs / 2812kg |
| Front tire |
11L-15 |
| Rear tire |
16.9R30 |
ELECTRICAL
| Ground |
negative |
| Charging system |
alternator |
| Battery volts |
12 |
