Specification sheet Wheel Loader Ref john-deere-644d-wheel-loader
John Deere 644D
The John Deere 644D is a wheel loader with an operating weight of 29,320 lb (13,300 kg), a 155 hp engine, and a 3 yd³ (2.3 m³) bucket.
✓ QA-verified — every figure checked for unit consistency, physical possibility, and class plausibility; failures withheld → Operating weight
29,320lb
13,300kg
Engine power
155hp
115.6kW
Net Power Bucket capacity
3yd³
2.3m³
◆Where it sits in its classpercentile · small wheel loaders
Among 439 small wheel loaders (22,000–45,000 lb), the John Deere 644D sits in the middle of its class:
- Operating weight 29,320 lb lighter than 58% (n=439)
- Engine power 155 hp less powerful than 59% (n=408)
- Bucket capacity 3 yd³ smaller-bucket than 66% (n=387)
◇Scale drawingdrawn to scale · mm
01 Engine Specification
| Number Of Cylinders | 6 | |
|---|---|---|
| Engine Make | 2240 | |
| Engine Model | 6-466T | |
| Net Power | 155hp | 115.6kw |
| Gross Power | 165hp | 123.1kw |
| Power Measured @ | 2200rpm | |
| Max Torque | 480lb ft | 650.8Nm |
| Displacement | 466cu in | 7.7L |
| Torque Measured @ | 1400rpm | |
| Aspiration | Turbocharged |
02 Operational Specification
| Operating Weight | 29320lb | 13300kg |
|---|---|---|
| Fuel Capacity | 67gal | 254L |
| Hydraulic System Fluid Capacity | 25.1gal | 95L |
| Engine Oil Fluid Capacity | 5.1gal | 19L |
| Cooling System Fluid Capacity | 7.4gal | 28L |
| Transmission Fluid Capacity | 9.8gal | 37L |
| Front Axle/Diff Fluid Capacity | 6.1gal | 23L |
| Rear Axle/Diff Fluid Capacity | 6.1gal | 23L |
| Static Tipping Weight | 25210lb | 11435.1kg |
| Turning Radius | 16.5ft in | 5029.2mm |
| Operating Voltage | 12V | |
| Alternator Supplied Amperage | 42amps | |
| Rear Axle Oscillation | 22degrees | |
| Tire Size | 20.5-25 |
03 Transmission Specification
| Transmission Type | Power shift planetary | |
|---|---|---|
| Number Of Forward Gears | 4 | |
| Number Of Reverse Gears | 2 | |
| Max Speed - Forward | 27.3mph | 43.9km/h |
| Max Speed - Reverse | 8.2mph | 13.2km/h |
04 Hydraulic System Specification
| Relief Valve Setting | 2625psi | 18099kPa |
|---|---|---|
| Pump Flow Capacity | 63gal/min | 238.5L/min |
| Raise Time | 6.1sec | |
| Dump Time | 2sec | |
| Lower Time | 4.3sec | |
| Pump Type | Gear type pump |
05 Bucket Dimensions
| Dump Clearance At Max Raise | 9.75ft in | 2970mm |
|---|---|---|
| Bucket Capacity - Heaped | 3yd3 | 2.3m3 |
| Bucket Capacity - Struck | 2.52yd3 | 1.93m3 |
| Bucket Width | 8.73ft in | 2660mm |
| Breakout Force | 24430lb | 109kN |
06 Dimensions Dimensions
| Ground Clearance | 1.69ft in | 514mm |
|---|---|---|
| Length With Bucket On Ground | 23.08ft in | 7034.79mm |
| Width Over Tires | 8.55ft in | 2605mm |
| Height To Top Of Cab | 10.5ft in | 3200.4mm |
| Wheelbase | 9.59ft in | 2920mm |
| Hinge Pin - Max Height | 12.67ft in | 3861.82mm |
| Reach At Max Lift And Dump | 3.07ft in | 933mm |
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.