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John Deere 80 Diesel

Built: 6/1955–7/1956 · Series: Nummern-Serie

More machines from model year 1955

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The Nummern series from John Deere includes the 80 Diesel. Production: 6/1955–7/1956. The engine delivers 68 hp (50 kW), has 2 cylinders, with a displacement of 7,726 cm³. Torque is 510 Nm. Rated speed is 1,125 rpm. The machine is 3,626 mm long, 2,019 mm wide and 2,057 mm high. The unladen weight is 3,861 kg. The wheelbase measures 2,172 mm. Top speed is 20 km/h. The tank holds 123 litres. Transmission: 6 V/1 R. The engine is water-cooled. Tyres: front 7.50 x 18, rear 15 x 34. The fuel is diesel. The bore measures 155.58 mm. The stroke is 203.2 mm. Construction: unit construction (no separate frame). The gearbox offers 6 forward gears. There are also 1 reverse gears. Around 3.485 units were built. The Nummern-Serie series covers 4 models. Rated output within it ranges from 28 to 68 hp; the 80 Diesel sits at the top of that range with 68 hp. Its immediate neighbours are the Modell 70 Diesel below it with 46.3 hp. Unladen weight within it ranges from 2,300 to 3,861 kg; here the 80 Diesel sits at the top of that range with 3,861 kg. 2622 John Deere models across 140 series are on record.

John Deere Numbered Series – Models 50, 70 and 80 from the 1950s that replaced the old lettered series at Waterloo, two-cylinder engines from 3.1 to 7.7 litres, 20.6 to 50 kW in diesel, petrol, LPG and multi-fuel form

This page brings together the John Deere Models 50, 70 and 80, with which the maker replaced its older lettered series with two-digit model numbers in the early 1950s at Waterloo, Iowa. The Model 80 of 1955 was John Deere's first production diesel tractor, while the 70 and 50 were additionally offered with petrol, LPG and multi-fuel engines. All models are built around the marque's characteristic horizontal two-cylinder engine.

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The register lists here 4 versions with 20.6 to 50 kW (28 to 68 hp) from two-cylinder engines displacing 3,111 to 7,726 cc. Unladen weights range from 2,300 to 3,861 kg, torque from 237 to 510 Nm at a rated speed of 975 to 1,250 rpm. Fuel types depending on the model span diesel, petrol, LPG and multi-fuel operation.

With the Numbered Series, John Deere rose to become a leading US tractor maker in the 1950s; the marque's characteristic two-cylinder with its deep exhaust beat shaped the brand's image for decades, before the New Generation series switched to multi-cylinder engines in 1960.

When buying used, check the condition of the two-cylinder's head and crankshaft, the tightness of the fuel system depending on engine variant, the clutch and gearbox, and rust on sheet metal and fenders. Parts are supplied by specialist vintage-tractor dealers and the John Deere network.

Sources: SpecCodex register, model data: John Deere Nummern-Serie, John Deere (manufacturer)

Technical data

Engine

Fuel	dieselcorrect
Power	68 hp (50 kW)correct
Rated speed	1,125 rpmcorrect
Torque	510 Nmcorrect
Cylinders	2correct
Displacement	7,726 cm³correct
Bore	155.58 mmcorrect
Stroke	203.2 mmcorrect
Cooling	water-cooledcorrect

Dimensions and weights

Length	3,626 mmcorrect
Width	2,019 mmcorrect
Height	2,057 mmcorrect
Wheelbase	2,172 mmcorrect
Unladen weight	3,861 kgcorrect

Drivetrain and chassis

Drive	rear-wheel drivecorrect
Gearbox	6 V/1 Rcorrect
Forward gears	6correct
Reverse gears	1correct
Front tyres	7.50 x 18correct
Rear tyres	15 x 34correct
Top speed	20 km/hcorrect

Working data

Fuel tank capacity	123 lcorrect

Origin and approval

Construction	unit construction (no separate frame)correct
Units built	3,485correct

Where this model stands

Power-to-weight ratio: 13 kW/t (50 kW / 3.9 t)

Power class: Universal (40–100 hp)

Stronger than 47% 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 John Deere 80 Diesel have?

The John Deere 80 Diesel delivers 68 hp.

How much does the John Deere 80 Diesel weigh?

The unladen weight is 3,861 kg.

What engine does the John Deere 80 Diesel have?

2 cylinders, 7,726 cm³ displacement, Diesel.

How fast does the John Deere 80 Diesel go?

Top speed is 20 km/h.

What are the dimensions of the John Deere 80 Diesel?

3,626 mm × 2,019 mm × 2,057 mm.

When was the John Deere 80 Diesel built?

Production years: 6/1955–7/1956.

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 26 individual figures for this model. They come from 2 recorded sources; 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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