Wikitractor

UTB/Universal 643

Production ended · 2WD or 4WD

PTO power · claimed

58 hp

Weight
6,192 lb
Engines
2 Diesel
Built
no record
Price new
no record

Power

Engine64 hp unspecified
PTO58 hp claimed
Drawbarno record
Listed power64 hp engine basis

Engines

UTB 3.6L 4-cyl dieselDiesel · 4 cyl219 ci
3.2L 4-cyl dieselDiesel · 4 cyl197 ci
Engine details
UTB 3.6L 4-cyl diesel
Bore × stroke
4.02 in × 4.33 in
Rated speed
2,400 rpm
Rated power
64 hp
Torque
152 lb·ft at 1,400 rpm
Compression
17:1
Cooling
liquid-cooled
3.2L 4-cyl diesel
Rated speed
2,400 rpm

Transmissions

8-speed constant meshconstant mesh8F / 2R
12-speed creepercreeper12F / 3R
8-speed shuttleshuttle8F / 8R
Transmission notes

8-speed constant mesh: Four gears (1-4) plus reverse (R) in two ranges (low and high).

12-speed creeper: Optional creeper adds a third range to the basic transmission.

Weight

Weight6,192 lb unspecified

Dimensions

Wheelbase89.4 in
Length149.2 in
Height100.4 in
Rear tread, narrowest55.5 in
Rear tread, widest75.2 in

Capacities

Fuel tank16.4 gal

Hydraulics

Systemopen center
Pump flow9 gpm
Pressure2,175 psi
Remote valves1

Hitch

Rear hitch categoryII
Controlposition and draft control
Rear lift capacity4,630 lb

PTO

Rear PTOindependent
Rear PTO speeds540/1000
Engine rpm at PTO speed540@2160

Chassis

Drive2WD/4WD
SteeringPower steering
BrakesWet disc brakes
Differential lockmechanical rear

Tires

Front6.00-16
Rear14.9R-28

Electrical

System voltage12 V
Battery capacity150 Ah
Chargingalternator
Groundnegative

Production

FactoriesBrasov, Romania
Built byUTB/Universal

Variants

  • 643DT 4WD
  • 643DTP narrow-profile

Literature

  • 3 Series Tractors Universal*
  • 3 Series Tractors Universal
  • 643 - 643 DT Universal
  • *Publication contains known errors.