John Deere 4640 (A)
Built: 1978–1982 · Series: 40er-Baureihe
More machines from model year 1978
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John Deere 1140 A to 4840 – the Generation 40 tractors of the late 1970s from Waterloo and Mannheim: A as an upgrade stage, 4840 as the range's strongest two-axle model, Deere three- to six-cylinders, 41 to 133 kW
The 40 series replaced the 30 series in 1977 and was John Deere's last big generation of pure two-axle tractors before the 50 series arrived in the early 1980s with a wider cab offering; smaller models such as the 1140 came from the European plant in Mannheim, big ones like the 4040 and 4840 from Waterloo, Iowa. The type logic orders size in ascending order through the first digit of the four-digit number, and the letter A marks an upgrade stage introduced during production with detail changes to cab and electrics. The 4840, with its turbocharged six-cylinder, was the largest conventional two-axle tractor Deere built in this generation, before the 8440/8640 four-wheel-drive series took the lead.
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The register lists 5 versions with engines of 2,938 to 7,640 cm³, 3 to 6 cylinders, outputs of 41.2 to 133.2 kW, torque up to 718 Nm and operating weights of 2,535 to 6,758 kg at 2,200 to 2,500 rpm.
40-series tractors are still numerous in European and North American farm fleets, valued as the last purely mechanical generation before electronics for their durability.
On used tractors, the condition of clutch and gearbox, leak-free hydraulics and lift linkage, rust on wings, bonnet and rear fenders, on the A model the electrics of the revised instruments, and good parts supply through Deere's dealer network count.
Sources: SpecCodex register, model data: John Deere 40er-Baureihe, John Deere (manufacturer)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 177 hp (130.8 kW)correct |
| Rated speed | 2,200 rpmcorrect |
| Torque | 718 Nmcorrect |
| Speed at max. torque | 1,400 rpmcorrect |
| Cylinders | 6correct |
| Displacement | 7,638 cm³correct |
| Bore | 115.8 mmcorrect |
| Stroke | 120.6 mmcorrect |
| Compression ratio | 15.5correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 4,350 mmcorrect |
|---|---|
| Width | 2,430 mmcorrect |
| Height | 2,960 mmcorrect |
| Wheelbase | 3,010 mmcorrect |
| Ground clearance | 370 mmcorrect |
| Unladen weight | 6,510 kgcorrect |
Drivetrain and chassis
| Drive | rear- or four-wheel drivecorrect |
|---|---|
| Gearbox | 16V/6Rcorrect |
| Front tyres | 11.00-16 ASF (A: 13.6 R 24 AS)correct |
| Rear tyres | 18.4-38 AS (A: 20.8 R 38 AS)correct |
| Top speed | 30 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|
Where this model stands
Power-to-weight ratio: 20.1 kW/t (131 kW / 6.5 t)
Power class: Large (100–180 hp)
Stronger than 89% 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 4640 (A) have?
The John Deere 4640 (A) delivers 177 hp.
How much does the John Deere 4640 (A) weigh?
The unladen weight is 6,510 kg.
What engine does the John Deere 4640 (A) have?
6 cylinders, 7,638 cm³ displacement, Diesel.
How fast does the John Deere 4640 (A) go?
Top speed is 30 km/h.
What are the dimensions of the John Deere 4640 (A)?
4,350 mm × 2,430 mm × 2,960 mm.
When was the John Deere 4640 (A) built?
Production years: 1978–1982.
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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Other models in this series
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Tractor in 3D section
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