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John Deere 644GH

Series: John Deere Wheel Loader

Source: https://www.deere.ca/en/loaders/wheel-loaders/mid-size-wheel

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The John Deere 644GH belongs to the John Deere Wheel Loader series. The engine delivers 198.7 hp (138 kW), has 6 cylinders, with a displacement of 7,636.4 cm³. Torque is 871.8 Nm. Rated speed is 2,200 rpm. The unladen weight is 16,616.9 kg. The wheelbase measures 3,200.4 mm. Ground clearance is 484.6 mm. The tank holds 284.3 litres. The gearbox has 4 forward gears. There are also 3 reverse gears. Maximum torque is reached at 1,300 rpm. The pump delivers 263.1 l/min. The hydraulic tank holds 115.1 litres. The cooling system holds 28.8 litres. The electrical system runs on 12 V. The engine fitted is the 6076A. Tyre size: 20,5-25. The John Deere Wheel Loader series covers 120 models. Rated output within it ranges from 55.8 to 286.9 hp; the 644GH sits in the upper part of that range with 198.7 hp. Its immediate neighbours are the 644EH below it with 195.7 hp and the 644H High Lift above it with 207.8 hp. 2153 John Deere models across 96 series are on record. The model is listed under Wheel loaders. 22 verified figures from 1 source are on file.

Technical data

Engine

Engine model6076Acorrect
Power198.7 hp (138 kW)correct
Rated speed2,200 rpmcorrect
Torque871.8correct
Speed at max. torque1,300 rpmcorrect
Cylinders6correct
Displacement7,636.4 cm³correct
AspirationTurbocharged and Aftercooledcorrect
Coolant capacity28.8 lcorrect

Dimensions and weights

Wheelbase3,200.4correct
Ground clearance484.6correct
Unladen weight16,616.9 kgcorrect

Drivetrain and chassis

Gearbox typepowershift transmissioncorrect
Forward gears4correct
Reverse gears3correct
Tyre size20.5-25correct
System voltage12 Vcorrect

Working data

Pump flow263.1 l/mincorrect
Hydraulic oil capacity115.1 lcorrect
Fuel tank capacity284.3 lcorrect

Other data

Height3,422.9correct

Where this model stands

Power-to-weight ratio: 8.3 kW/t (138 kW / 16.6 t)

Stronger than 69% of the wheel loaders in the register — out of 1,253 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 644GH have?

The John Deere 644GH delivers 199 hp.

How much does the John Deere 644GH weigh?

The unladen weight is 16,617 kg.

What engine does the John Deere 644GH have?

6 cylinders, 7,636 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.
  • 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 22 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

204L

210LE

244E

244H

244J

244K-II

304H Waste Handler

304J

304L

324H

324J

324K

Sources: [1]

Wheel loader in 3D section

Turn the model, look inside and click an assembly — each one is explained.

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