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John Deere 646

Series: John Deere Compactor

Source: https://www.ritchielist.com/2/2-4041-10290/john-deere-640fd/

The John Deere 646 is a model in the John Deere Compactor series. The engine delivers 143.1 hp (97.7 kW), has 6 cylinders, with a displacement of 6,620.4 cm³. Torque is 471.8 Nm. Rated speed is 2,200 rpm. The unladen weight is 13,613.2 kg. The wheelbase measures 3,642.4 mm. The tank holds 189.3 litres. The gearbox has 4 forward gears. There are also 2 reverse gears. Maximum torque is reached at 1,600 rpm. The hydraulic tank holds 66.2 litres. The cooling system holds 34.1 litres. The oil fill is 16.3 litres. The electrical system runs on 12 V. Rated output across the John Deere range ranges from 10.6 to 577.9 hp; the 646 sits in the lower part of that range with 143.1 hp. Its immediate neighbours are the 690B below it with 143 hp and the JD770 above it with 144 hp. 2153 John Deere models across 96 series are on record. The model is listed under Road construction. 19 verified figures from 1 source are on file.

Technical data

Engine

Power	143.1 hp (97.7 kW)correct
Rated speed	2,200 rpmcorrect
Torque	471.8correct
Speed at max. torque	1,600 rpmcorrect
Cylinders	6correct
Displacement	6,620.4 cm³correct
Aspiration	turbochargedcorrect
Coolant capacity	34.1 lcorrect
Engine oil capacity	16.3 lcorrect

Dimensions and weights

Wheelbase	3,642.4correct
Unladen weight	13,613.2 kgcorrect

Drivetrain and chassis

Gearbox type	Power Shiftcorrect
Forward gears	4correct
Reverse gears	2correct
System voltage	12 Vcorrect

Working data

Hydraulic oil capacity	66.2 lcorrect
Fuel tank capacity	189.3 lcorrect

Other data

Height	3,130.3correct

Where this model stands

Power-to-weight ratio: 7.2 kW/t (98 kW / 13.6 t)

Stronger than 41% of the compaction equipment in the register — out of 223 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 646 have?

The John Deere 646 delivers 143 hp.

How much does the John Deere 646 weigh?

The unladen weight is 13,613 kg.

What engine does the John Deere 646 have?

6 cylinders, 6,620 cm³ displacement.

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.
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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