Specification sheet Wheel Loader Ref john-deere-644b-wheel-loader
John Deere 644B
The John Deere 644B is a wheel loader with an operating weight of 28,100 lb (12,746 kg), a 145 hp engine, and a 2.5 yd³ (1.91 m³) bucket.
✓ QA-verified — every figure checked for unit consistency, physical possibility, and class plausibility; failures withheld → Operating weight
28,100lb
12,746kg
Engine power
145hp
108.1kW
Net Power Bucket capacity
2.5yd³
1.91m³
◆Where it sits in its classpercentile · small wheel loaders
Among 439 small wheel loaders (22,000–45,000 lb), the John Deere 644B sits below the median for its class:
- Operating weight 28,100 lb lighter than 65% (n=439)
- Engine power 145 hp less powerful than 69% (n=408)
- Bucket capacity 2.5 yd³ smaller-bucket than 81% (n=387)
◇Scale drawingdrawn to scale · mm
01 Engine Specification
| Number Of Cylinders | 6 | |
|---|---|---|
| Engine Make | 2240 | |
| Net Power | 145hp | 108.1kw |
| Gross Power | 160hp | 119.3kw |
| Power Measured @ | 2200rpm | |
| Max Torque | 432lb ft | 586Nm |
| Displacement | 531cu in | 8.8L |
| Torque Measured @ | 1500rpm | |
| Aspiration | Turbocharged |
02 Operational Specification
| Operating Weight | 28100lb | 12746kg |
|---|---|---|
| Fuel Capacity | 56gal | 211.9L |
| Hydraulic System Fluid Capacity | 17.5gal | 66.3L |
| Engine Oil Fluid Capacity | 5.5gal | 20.9L |
| Cooling System Fluid Capacity | 12.3gal | 46.4L |
| Transmission Fluid Capacity | 9.8gal | 37L |
| Front Axle/Diff Fluid Capacity | 6gal | 22.7L |
| Rear Axle/Diff Fluid Capacity | 6.3gal | 23.7L |
| Static Tipping Weight | 22905lb | 10390kg |
| Turning Radius | 15.5ft in | 4700.1mm |
| Operating Voltage | 12V | |
| Alternator Supplied Amperage | 42amps | |
| Rear Axle Oscillation | 22degrees | |
| Tire Size | 14.5-25 / 20.5-25 |
03 Transmission Specification
| Transmission Type | Power shift Planetary | |
|---|---|---|
| Number Of Forward Gears | 4 | |
| Number Of Reverse Gears | 2 | |
| Max Speed - Forward | 25.8mph | 41.5km/h |
| Max Speed - Reverse | 10.2mph | 16.4km/h |
04 Hydraulic System Specification
| Pump Flow Capacity | 58.2gal/min | 220L/min |
|---|---|---|
| Pump Type | Gear |
05 Bucket Dimensions
| Dump Clearance At Max Raise | 9.33ft in | 2843.79mm |
|---|---|---|
| Breakout Force | 24120lb | 108.11kN |
| Bucket Capacity - Heaped | 2.5yd3 | 1.91m3 |
| Bucket Capacity - Struck | 2.05yd3 | 1.57m3 |
| Bucket Width | 8.73ft in | 2660mm |
06 Dimensions Dimensions
| Ground Clearance | 1.66ft in | 505mm |
|---|---|---|
| Length With Bucket On Ground | 21.1ft in | 6042mm |
| Height To Top Of Cab | 10.63ft in | 3240.03mm |
| Wheelbase | 8.67ft in | 2640mm |
| Hinge Pin - Max Height | 12ft in | 3657.6mm |
| Reach At Max Lift And Dump | 2.89ft in | 879mm |
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.