J Bautz AG Saulgau B 14 AS
Built: 1949–1951 · Series: AS
More machines from model year 1949
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J. Bautz AG Saulgau, AS line: the single-cylinder diesel B 14 AS with thermosiphon cooling, 1,022 cc, 10.5 kW and 1,150 kg weight, from the early post-war years
J. Bautz AG was a tractor manufacturer from southern Germany, based in Saulgau in Württemberg, that built simple, rugged single-cylinder diesel tractors in the early post-war years. The AS line stood for this basic configuration. With its thermosiphon cooling and no water pump, the B 14 AS is technically typical of the simple, low-maintenance single-cylinder engines of the period.
Read on 3 more paragraphs
The single-cylinder engine of 1,022 cc produces 10.5 kW (14 hp) at 1,500 rpm and drives the tractor to a top speed of 18 km/h. At a weight of 1,150 kg, a wheelbase of 1,445 mm and a width of 1,520 mm, this is a small, compact field tractor for medium-sized holdings.
Single-cylinder diesel tractors with thermosiphon cooling were considered especially reliable, since they lacked the failure-prone water pump; cooling relies solely on the natural circulation of heated coolant. That made them attractive to farms with little workshop time to spare. The low top speed of 18 km/h places the B 14 AS firmly in the slow tractor category capped at 40 km/h.
Buying a used B 14 AS means checking the cooling circuit above all, since thermosiphon cooling overheats quickly once scale builds up or channels clog. The crankshaft bearings and injection pump of such an old single-cylinder unit should be inspected, along with rust in the sheet metal. Parts for these early Bautz models today come only from a handful of collectors and specialists.
Sources: SpecCodex-Register: Kennwerte des Modells B 14 AS
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 14 hp (10.5 kW)correct |
| Rated speed | 1,500 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 1,022 cm³correct |
| Cooling | Themosiphonkühlungcorrect |
Dimensions and weights
| Length | 2,360 mmcorrect |
|---|---|
| Width | 1,520 mmcorrect |
| Height | 1,480 mmcorrect |
| Wheelbase | 1,445 mmcorrect |
| Ground clearance | 300 mmcorrect |
| Unladen weight | 1,150 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 4V+Rcorrect |
| Front tyres | 5.00-16correct |
| Rear tyres | 8.00-20 AScorrect |
| Top speed | 18 km/hcorrect |
Origin and approval
| Construction | frameless unit constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 9.1 kW/t (10 kW / 1.1 t)
Power class: Compact (< 40 hp)
Stronger than 3% 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 J Bautz AG Saulgau B 14 AS have?
The J Bautz AG Saulgau B 14 AS delivers 14 hp.
How much does the J Bautz AG Saulgau B 14 AS weigh?
The unladen weight is 1,150 kg.
What engine does the J Bautz AG Saulgau B 14 AS have?
1 cylinders, 1,022 cm³ displacement, Diesel.
How fast does the J Bautz AG Saulgau B 14 AS go?
Top speed is 18 km/h.
What are the dimensions of the J Bautz AG Saulgau B 14 AS?
2,360 mm × 1,520 mm × 1,480 mm.
When was the J Bautz AG Saulgau B 14 AS built?
Production years: 1949–1951.
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 19 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: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
