Belarus / Onega TDT-40
Built: 05.1956–1958 · Series: TДT
More machines from model year 1956
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Onega plant TDT-40: lighter Soviet tracked skidding tractor from Karelia with a 4,500cc diesel, 40 hp and a weight of 6,500 kg
The Onega plant in Petrozavodsk in the Soviet republic of Karelia also built skidding tractors under the TДT range, needed across the vast forest areas of northern Russia for forestry work. The TDT-40 was built between 1956 and 1958 as a lighter version of this design.
Read on 3 more paragraphs
The TDT-40 carries a four-cylinder diesel engine with 4,500 cm³ of displacement, producing 40 hp at 1,500 rpm. At 6,500 kg, 4,500 mm long, with a 2,040 mm wheelbase and 1,830 mm width and 2,430 mm height, the machine is noticeably lighter than the larger TDT-60 of the same range name, but is built as a similar tracked tractor for rough forest terrain.
Like other skidding tractors, the TDT-40 hauled felled logs out of the stand using a rear cable winch, with the load partly dragged along the ground and partly lifted to avoid damaging the remaining timber. The tracked undercarriage kept ground pressure low even on soft forest floor and allowed work independent of paved roads.
When buying used, the tracks, track rollers and winch are the critical wear parts, as they work in constant contact with soil, stones and branches in the forest. The frame around the towing point and cable guide should be examined for cracks, as should the cooling system seals, which often leak after decades of service. Working independently of any paved road was essential in logging areas that often had no road network at all.
Sources: SpecCodex-Register: Kennwerte des Modells Onegawerk TDT-40
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 40 hpcorrect |
| Rated speed | 1,500 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 4,500 cm³correct |
Dimensions and weights
| Length | 4,500 mmcorrect |
|---|---|
| Width | 1,830 mmcorrect |
| Height | 2,430 mmcorrect |
| Wheelbase | 2,040 mmcorrect |
| Ground clearance | 540 mmcorrect |
| Unladen weight | 6,500 kgcorrect |
Drivetrain and chassis
| Drive | Kettecorrect |
|---|---|
| Gearbox | 5/1correct |
Origin and approval
| Construction | Kettentraktorcorrect |
|---|---|
| Units built | '''3430''' (1956); '''12977''' (bis 1958)correct |
Where this model stands
Power-to-weight ratio: 4.5 kW/t (29 kW / 6.5 t)
Power class: Compact (< 40 hp)
Stronger than 25% 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 Belarus / Onega TDT-40 have?
The Belarus / Onega TDT-40 delivers 40 hp.
How much does the Belarus / Onega TDT-40 weigh?
The unladen weight is 6,500 kg.
What engine does the Belarus / Onega TDT-40 have?
4 cylinders, 4,500 cm³ displacement, Diesel.
What are the dimensions of the Belarus / Onega TDT-40?
4,500 mm × 1,830 mm × 2,430 mm.
When was the Belarus / Onega TDT-40 built?
Production years: 05.1956–1958.
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.
- 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 15 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
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