Long Agribusiness 550 Specs ( 1972-1975 )
Overview
The Long Agribusiness 550 is a 2WD utility tractor manufactured by UTB/Universal in Romania from 1972 to 1975. It is equipped with a 3.1L Uzina four-cylinder diesel engine, an 8-speed gear transmission, and an open operator station. The tractor features a Category II/I rear hitch with a lift capacity of 2660 lbs and is rated for a 540 RPM rear PTO.
Ideal Applications
Nebraska Test Performance:
In Nebraska Tractor Test 1109, the unit recorded a maximum drawbar power of 46.73 hp and a maximum pull of 6,944 lbs while operating at a fuel consumption rate of 3.6 gallons per hour.
Mechanical and Weight Specifications:
The tractor has a base operating weight of 4570 lbs and a ballasted weight of 9110 lbs, utilizing an 8-speed gear transmission with a 279.4mm dry disc clutch.
Hydraulic and Hitch Capacity:
The open center hydraulic system provides a pump flow of 5.75 gpm at 2133 psi, supporting a rear lift capacity of 2660 lbs on a dual-category (II/I) hitch.
Production
| Description | Utility tractor / Built in Brasov, Romania |
|---|---|
| Distributor | Long |
| Manufacturer | UTB/Universal |
Engine
| Engine type | Uzina 3.1L 4-cyl diesel |
|---|---|
| Fuel tank | 14.25 gal (53.9 L) |
| Bore/Stroke | 3.74x4.33 inches (95 x 110 mm) |
| Compression | 17:1 |
| Coolant capacity | 14.7 qts (13.9 L) |
| Description | Uzina / diesel / 4-cylinder / liquid-cooled |
| Displacement | 190.7 ci (3.1 L) |
| Fuel system | direct injection |
| Oil capacity | 11 qts (10.4 L) |
| Power | 60 hp (44.7 kW) |
| Rated RPM | 2400 |
| Starter volts | 12 |
| Drawbar (claimed) | 46.7 hp (34.8 kW) |
| Drawbar (tested) | 46.73 hp (34.8 kW) |
| PTO (claimed) | 53.7 hp (40.0 kW) |
| PTO (tested) | 53.61 hp (40.0 kW) |
Transmission
| Clutch | 279.4mm dry disc |
|---|---|
| Gears | 8 forward and 2 reverse |
| Oil capacity | 18 qts (17.0 L) |
| Transmission type | 8-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Independent contracting band brakes |
| Drive type | Two-wheel drive |
| Steering | manual |
Hydraulics
| Pressure | 2133 psi (147.1 bar) |
|---|---|
| Pump flow | 5.75 gpm (21.8 lpm) |
| Type | open center |
Hitch
| Rear lift | 2660 lbs (1206 kg) |
|---|---|
| Rear Type | II/I |
PTO
| Engine RPM | 540@1970 |
|---|---|
| Rear PTO Type | 540 (1.375) |
Electrical
| Battery volts | 12 |
|---|---|
| Ground | negative |
Dimensions & Tires
| Ballasted weight | 9110 lbs (4132 kg) |
|---|---|
| Front tread | 52 to 79 inches (132 to 200 cm) |
| Operating weight | 4570 lbs (2072 kg) |
| Rear tread | 47.25 to 74.7 inches (120 to 189 cm) |
| Wheelbase | 81.5 inches (207 cm) |
| Front tire | 7.50-16 |
| Rear tire | 18.4-28 |
| Weight | 4570 lbs (2072 kg) |
| Wheelbase | 81.5 inches (207 cm) |
| Ag front | 7.50-16 |
| Ag rear | 18.4-28 / 14.9x28 |
Nebraska Tractor Test 1109
| Description | Diesel 8-speed 2WDSeptember 21 - October 2, 1972Link: Nebraska Tractor Test 1109 file / PTO performance / Drawbar performance / Gear 5 used for power test. / Gear 2 used for pull test. |
|---|---|
| Fuel use | 3.6 gal/hour (13.6 l/hour) / 3.2 gal/hour (12.1 l/hour) / 3.6 gal/hour (13.6 l/hour) |
| Max power | 46.73 hp (34.8 kW) |
| Max pull | 6,944 lbs (3149 kg) |
| Power at rated engine speed | 53.61 hp (40.0 kW) |
| Power at rated PTO speed | 47.66 hp (35.5 kW) |