Specification sheet Wheel Loader Ref john-deere-644a-wheel-loader
John Deere 644A
The John Deere 644A is a wheel loader with a 2.5 yd³ (1.92 m³) bucket.
✓ QA-verified — every figure checked for unit consistency, physical possibility, and class plausibility; failures withheld → Bucket capacity
2.5yd³
1.92m³
◆Where it sits in its classnot positioned
This machine has no published operating weight, so it cannot be placed in a wheel-loader weight band.
◇Scale drawingdrawn to scale · mm
01 Engine Specification
| Engine Make | 2240 | |
|---|---|---|
| Power Measured @ | 2400rpm | |
| Max Torque | 345lb ft | 467.8Nm |
| Displacement | 404cu in | 6.7L |
| Torque Measured @ | 1600rpm | |
| Aspiration | Turbocharged |
02 Operational Specification
| Fuel Capacity | 50gal | 189.3L |
|---|---|---|
| Hydraulic System Fluid Capacity | 17.5gal | 66.2L |
| Engine Oil Fluid Capacity | 4.3gal | 16.1L |
| Cooling System Fluid Capacity | 9gal | 34.1L |
| Transmission Fluid Capacity | 9.8gal | 36.9L |
| Front Axle/Diff Fluid Capacity | 6gal | 22.7L |
| Rear Axle/Diff Fluid Capacity | 6.5gal | 24.6L |
| Static Tipping Weight | 18604lb | 8439kg |
| Turning Radius | 15.5ft in | 4700.1mm |
| Operating Voltage | 12V | |
| Alternator Supplied Amperage | 55amps | |
| Rear Axle Oscillation | 22degrees | |
| Tire Size | 16-24 / 20.5- 25 |
03 Transmission Specification
| Transmission Type | Powershift Transmission | |
|---|---|---|
| Number Of Forward Gears | 4 | |
| Number Of Reverse Gears | 2 | |
| Max Speed - Forward | 23mph | 37km/h |
| Max Speed - Reverse | 9.5mph | 15.3km/h |
04 Hydraulic System Specification
| Relief Valve Setting | 2250psi | 15513.2kPa |
|---|---|---|
| Pump Flow Capacity | 60gal/min | 227L/min |
| Pump Type | Variable displacement type pump |
05 Bucket Dimensions
| Dump Clearance At Max Raise | 9.25ft in | 2819.4mm |
|---|---|---|
| Breakout Force | 41515lb | 184.67kN |
| Bucket Capacity - Heaped | 2.5yd3 | 1.92m3 |
| Bucket Capacity - Struck | 2.05yd3 | 1.57m3 |
| Bucket Width | 8.7ft in | 2650mm |
06 Dimensions Dimensions
| Ground Clearance | 1.44ft in | 437mm |
|---|---|---|
| Length With Bucket On Ground | 20.67ft in | 6300.22mm |
| Height To Top Of Cab | 10.17ft in | 3099.82mm |
| Wheelbase | 8.67ft in | 2640mm |
| Hinge Pin - Max Height | 11.85ft in | 3610mm |
| Reach At Max Lift And Dump | 2.92ft in | 889mm |
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.