Utb Sr Rumänien U-550 (DT)
Built: 1974–1981 · Series: 500
More machines from model year 1974
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U-550 (DT) (500 series) by Utb Sr Romania: four-cylinder diesel engine rated at 38.3 kW (52 hp), built between 1974 and 1981.
The 500 series from the Romanian maker Utb covered the lower to mid-power class of the 1970s, with the DT designation, following an Italian-influenced naming pattern, referring to four-wheel drive (doppia trazione).
Read on 3 more paragraphs
The U-550 (DT) is powered by a four-cylinder diesel engine of 3,119 cm³ displacement, delivering 38.3 kW (52 hp) and 177 Nm of torque at 2,400 rpm. At an unladen weight of 2,315 kg, a wheelbase of 2,060 mm and a top speed of 23 km/h, the tractor is a light, four-wheel-drive all-purpose tractor, at a ratio of roughly 60 kg of weight per kW.
Four-wheel drive substantially increases pulling power on slippery or loose ground for tractors of this size, which is why DT variants were preferred over the simpler rear-drive models for heavier soils and sloped terrain, at otherwise identical engine output and similar fuel consumption.
On a used U-550 (DT), besides the engine and clutch, the front axle and its four-wheel-drive components deserve particular attention, since the transfer case and joints are the most vulnerable parts on four-wheel-drive tractors of this era after years of field work on heavy soil. Here too, parts for Utb models are only available to a limited extent outside Romania, and the brakes deserve close, thorough inspection after decades of use before any purchase.
Sources: SpecCodex-Register: Kennwerte des Modells U-550 (DT)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 52 hp (38.3 kW)correct |
| Rated speed | 2,400 rpmcorrect |
| Torque | 177 Nmcorrect |
| Speed at max. torque | 1,500 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 3,119 cm³correct |
| Bore | 95 mmcorrect |
| Stroke | 110 mmcorrect |
| Compression ratio | 17correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,600 mmcorrect |
|---|---|
| Width | 1,780 mmcorrect |
| Height | 2,270 mmcorrect |
| Wheelbase | 2,060 mmcorrect |
| Ground clearance | 470 mmcorrect |
| Unladen weight | 2,315 kgcorrect |
Drivetrain and chassis
| Drive | four-wheel drivecorrect |
|---|---|
| Gearbox | 8 V/2 R, 12 V/3 R and 8 V/8 Rcorrect |
| Front tyres | 6.00-16 ASF (DT: 9.5 R 20 AS)correct |
| Rear tyres | 14.9-28 AScorrect |
| Top speed | 23 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|
Where this model stands
Power-to-weight ratio: 16.5 kW/t (38 kW / 2.3 t)
Power class: Universal (40–100 hp)
Stronger than 36% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Utb Sr Rumänien U-550 (DT) have?
The Utb Sr Rumänien U-550 (DT) delivers 52 hp.
How much does the Utb Sr Rumänien U-550 (DT) weigh?
The unladen weight is 2,315 kg.
What engine does the Utb Sr Rumänien U-550 (DT) have?
4 cylinders, 3,119 cm³ displacement, Diesel.
How fast does the Utb Sr Rumänien U-550 (DT) go?
Top speed is 23 km/h.
What are the dimensions of the Utb Sr Rumänien U-550 (DT)?
3,600 mm × 1,780 mm × 2,270 mm.
When was the Utb Sr Rumänien U-550 (DT) built?
Production years: 1974–1981.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 24 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Sources: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.