David Brown 850 IMPLEMATIC (26.1 kW)
Built: 01/1960–10/1965 · Series: 100 er-Baureihe
More machines from model year 1960
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
David Brown 100 range – 850, 880 and 950 Implematic from Meltham: four-cylinder diesel from 26.1 to 31.7 kW, 2,523 to 2,707 cm³ displacement and Implematic hydraulics
The 100 range from David Brown Tractors, built at the Meltham plant in West Yorkshire, carries in its models 850 Implematic, 880 Implematic and 950 Implematic the name of the maker's own Implematic hydraulics for the three-point linkage, with which David Brown competed at the time against Ferguson's hydraulic system.
Read on 3 more paragraphs
The register lists 3 versions with 26.1 to 31.7 kW rated output at 2,000 to 2,200 rpm. The engines produce between 2,523 and 2,707 cm³ displacement, operating weights range from 1,680 to 1,900 kg at lengths from 2,896 to 2,997 mm and heights from 1,308 to 1,391 mm. The engines came from David Brown's own production and ran, depending on the model, on diesel, petrol or paraffin.
The 100 range targeted smaller and medium-sized British farms of the post-war modernisation era and had to hold its own chiefly against the Massey Ferguson TE20 and its successors. The Implematic hydraulics was a key selling point against older, purely mechanical lift systems.
When buying used, the condition of the Implematic hydraulics, clutch and gearbox, and corrosion on sheet-metal parts and radiator rank among the key checks. On the multi-fuel engines running on paraffin, it is also worth checking the carburettor or pre-heating system; spare parts are carried by specialist vintage farm machinery dealers.
Sources: SpecCodex register, model data: David Brown 100er-Baureihe
Technical data
Engine
| Engine make | David Browncorrect |
|---|---|
| Fuel | Diesel/Benzincorrect |
| Power | 35.5 hp (26.1 kW)correct |
| Rated speed | 2,000 rpmcorrect |
| Torque | 149 Nmcorrect |
| Speed at max. torque | 1,175 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 2,523 cm³correct |
| Bore | 88.9 mmcorrect |
| Stroke | 101.6 mmcorrect |
| Compression ratio | 17correct |
| Injection pressure | 172 barcorrect |
| Naturally aspirated | naturally aspiratedcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 2,896 mmcorrect |
|---|---|
| Width | 1,594 mmcorrect |
| Height | 1,308 mmcorrect |
| Wheelbase | 1,911 mmcorrect |
| Ground clearance | 394 mmcorrect |
| Unladen weight | 1,680 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6 V/2 R and 12 V/4 Rcorrect |
| Gears | 6correct |
| Front tyres | 5.50-16 ASFcorrect |
| Rear tyres | 10-28 AScorrect |
| Top speed | 25 km/hcorrect |
Origin and approval
| Plant | Meltham, West Yorkshire, Englandcorrect |
|---|---|
| Units built | 13.771 (Varianten: A, B, C, D)correct |
Other data
| Linkage category | Cat Icorrect |
|---|
Where this model stands
Power-to-weight ratio: 15.5 kW/t (26 kW / 1.7 t)
Power class: Compact (< 40 hp)
Stronger than 22% 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 David Brown 850 IMPLEMATIC have?
The David Brown 850 IMPLEMATIC delivers 35.5 hp.
How much does the David Brown 850 IMPLEMATIC weigh?
The unladen weight is 1,680 kg.
What engine does the David Brown 850 IMPLEMATIC have?
4 cylinders, 2,523 cm³ displacement, Diesel/Benzin.
How fast does the David Brown 850 IMPLEMATIC go?
Top speed is 25 km/h.
What are the dimensions of the David Brown 850 IMPLEMATIC?
2,896 mm × 1,594 mm × 1,308 mm.
When was the David Brown 850 IMPLEMATIC built?
Production years: 01/1960–10/1965.
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.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
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This page carries 34 individual figures for this model. They come from 4 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
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Other models in this series
Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · Traficom — Finnish vehicle register (retrieved August 2026) · Tractor & Construction Plant Wiki (retrieved August 2026) · Wikipedia (retrieved August 2026) · How we check the data
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