Specification sheet Wheel Loader Ref john-deere-644gh-wheel-loader
John Deere 644GH
The John Deere 644GH is a wheel loader with an operating weight of 36,634 lb (16,616.91 kg), a 185 hp engine, and a 4 yd³ (3.06 m³) bucket.
✓ QA-verified — every figure checked for unit consistency, physical possibility, and class plausibility; failures withheld → Operating weight
36,634lb
16,616.91kg
Engine power
185hp
138kW
Net Power Bucket capacity
4yd³
3.06m³
◆Where it sits in its classpercentile · small wheel loaders
Among 439 small wheel loaders (22,000–45,000 lb), the John Deere 644GH sits above the median for its class:
- Operating weight 36,630 lb heavier than 72% (n=439)
- Engine power 185 hp more powerful than 67% (n=408)
- Bucket capacity 4 yd³ larger-bucket than 77% (n=387)
◇Scale drawingdrawn to scale · mm
01 Engine Specification
| Number Of Cylinders | 6 | |
|---|---|---|
| Engine Make | 2240 | |
| Engine Model | 6076A | |
| Net Power | 185hp | 138kw |
| Gross Power | 196hp | 146kw |
| Power Measured @ | 2200rpm | |
| Max Torque | 643lb ft | 872Nm |
| Displacement | 466cu in | 7.7L |
| Torque Measured @ | 1300rpm | |
| Aspiration | Turbocharged and Aftercooled |
02 Operational Specification
| Operating Weight | 36634lb | 16617kg |
|---|---|---|
| Fuel Capacity | 75.1gal | 284L |
| Hydraulic System Fluid Capacity | 30.4gal | 115L |
| Engine Oil Fluid Capacity | 6.4gal | 24L |
| Cooling System Fluid Capacity | 7.6gal | 28.5L |
| Transmission Fluid Capacity | 3.7gal | 14L |
| Front Axle/Diff Fluid Capacity | 7.4gal | 28L |
| Rear Axle/Diff Fluid Capacity | 7.4gal | 28L |
| Static Tipping Weight | 29712lb | 13477.2kg |
| Turning Radius | 18ft in | 5460mm |
| Operating Voltage | 12V | |
| Alternator Supplied Amperage | 95amps | |
| Rear Axle Oscillation | 26degrees | |
| Tire Size | 20.5-25 |
03 Transmission Specification
| Transmission Type | Powershift | |
|---|---|---|
| Number Of Forward Gears | 4 | |
| Number Of Reverse Gears | 3 | |
| Max Speed - Forward | 21.5mph | 34.6km/h |
| Max Speed - Reverse | 13.7mph | 22km/h |
04 Hydraulic System Specification
| Relief Valve Setting | 3000psi | 20684.3kPa |
|---|---|---|
| Pump Flow Capacity | 69.5gal/min | 263.1L/min |
| Raise Time | 6.2sec | |
| Dump Time | 1.8sec | |
| Lower Time | 3.5sec | |
| Pump Type | Gear pump type |
05 Bucket Dimensions
| Dump Clearance At Max Raise | 9.66ft in | 2942mm |
|---|---|---|
| Bucket Capacity - Heaped | 4yd3 | 3.06m3 |
| Bucket Capacity - Struck | 3.63yd3 | 2.78m3 |
| Bucket Width | 10.01ft in | 3050mm |
| Breakout Force | 38045lb | 169.24kN |
06 Dimensions Dimensions
| Ground Clearance | 1.59ft in | 483mm |
|---|---|---|
| Length With Bucket On Ground | 25.79ft in | 7860mm |
| Width Over Tires | 8.97ft in | 2732mm |
| Height To Top Of Cab | 11.23ft in | 3420mm |
| Wheelbase | 10.5ft in | 3200mm |
| Hinge Pin - Max Height | 13.13ft in | 4000mm |
| Reach At Max Lift And Dump | 3.45ft in | 1049mm |
Method. Figures are manufacturer reference specifications, not measurements. Every value is checked for unit consistency, physically possible magnitude, and plausibility for its equipment class before publication; figures that fail any check are withheld rather than shown, and figures reconstructed from related data are marked above. Imperial and metric figures are reproduced as published, except where a note states otherwise.