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John Deere 644B Specs
John Deere 644B wheel loader specifications: type Wheel Loader, horsepower 108.1 kW, weight 12745.9 kg, tipping capacity 10391.8 kg.
Manufacturer specifications
| Specification | Metric | Imperial |
|---|---|---|
| Type | Wheel Loader | |
| Horsepower | 108.1 kW | 145 hp |
| Weight | 12745.9 kg | 28100 lbs |
| Tipping Capacity | 10391.8 kg | 22910 lbs |
| Max Speed | 41.5 km/h | 25.8 mph |
| No Of Cylinders | 6 | |
| Aspiration | Turbocharged | |
| Displacement | 8701.6 cc | 531 cu in. |
| Alternator Supplied Amperage | 42 amps | |
| Operating Voltage | 12 V | |
| Rated Speed | 2200 RPM | |
| Torque Speed | 1500 RPM | |
| Net Power | 108.1 kW | 145 hp |
| Gross Power | 119.3 kW | 160 hp |
| Peak Torque | 585.7 N-m | 432 lbs ft |
| Fuel Capacity | 212.0 l | 56 gal |
| Engine Oil Capacity | 20.8 l | 5.5 gal |
| Cooling Capacity | 46.6 l | 12.3 gal |
| Hydraulic System Capacity | 66.2 l | 17.5 gal |
| Transmission Oil Capacity | 37.1 l | 9.8 gal |
| Differential Front Capacity | 22.7 l | 6 gal |
| Differential Rear Capacity | 23.8 l | 6.3 gal |
| Transmission Type | Power shift | |
| No of Forward Gears | 4 | |
| No of Reverse Gears | 2 | |
| Rear Axle Oscillation | 22 ° | |
| Max Speed (Forward) | 41.5 km/h | 25.8 mph |
| Max Speed (Reverse) | 16.4 km/h | 10.2 mph |
| Pump type | Gear | |
| Pump Flow | 220.3 LPM | 58.2 GPM |
| Relief Pressure | 155.1 bar | 2250 psi |
| Operating Weight | 12745.9 kg | 28100 lbs |
| Tipping Load | 10391.8 kg | 22910 lbs |
| Bucket Capacity (Heaped) | 1.9 m³ | 2.5 cu yds |
| Bucket Capacity (Struck) | 1.6 m³ | 2.1 cu yds |
| Bucket Width | 274.3 cm | 108 in |
| Breakout Force | 10940.6 kg | 24120 lbs |
| Reach At Max Lift And Dump | 91.4 cm | 36 in |
| Dump Clearance At Max Raise | 274.3 cm | 108 in |
| Turning Radius | 487.7 cm | 192 in |
| Wheelbase | 274.3 cm | 108 in |
| Bucket Hinge Pin | 365.8 cm | 144 in |
| Cab Height | 335.3 cm | 132 in |
| Overall Length | 640.1 cm | 252 in |
| Ground Clearance | 61.0 cm | 24 in |
| Tire Size | 14.5-25 / 20.5-25 |
Source: heavyequipments.net archive (imported 2026-10). Values may vary by variant and production year; seller claims are shown separately on the listing page.
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