SPECS / COMPARISON
Compare models
Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.
| Feature | John Deere 644BWheel loader | Komatsu WA250PZ-6 Quick CouplerWheel loader |
|---|---|---|
| Type | Wheel Loader | Wheel Loader |
| Horsepower | 108.1 kW | — |
| Weight | 12745.9 kg | 12854.8 kg |
| Tipping Capacity | 10391.8 kg | — |
| Max Speed | 41.5 km/h | — |
| No Of Cylinders | 6 | 2 |
| Aspiration | Turbocharged | Turbocharged, aftercooled |
| Displacement | 8701.6 cc | 6690.9 cc |
| Alternator Supplied Amperage | 42 amps | — |
| Operating Voltage | 12 V | — |
| Rated Speed | 2200 RPM | — |
| Torque Speed | 1500 RPM | — |
| Net Power | 108.1 kW | — |
| Gross Power | 119.3 kW | — |
| Peak Torque | 585.7 N-m | — |
| Fuel Capacity | 212.0 l | 186.2 l |
| Engine Oil Capacity | 20.8 l | 23.1 l |
| Cooling Capacity | 46.6 l | 22.3 l |
| Hydraulic System Capacity | 66.2 l | 67.0 l |
| Transmission Oil Capacity | 37.1 l | — |
| Differential Front Capacity | 22.7 l | — |
| Differential Rear Capacity | 23.8 l | — |
| Transmission Type | Power shift | Hydrostatic, 1 pump, 2 motors with speed range select |
| No of Forward Gears | 4 | — |
| No of Reverse Gears | 2 | — |
| Rear Axle Oscillation | 22 ° | — |
| Max Speed (Forward) | 41.5 km/h | — |
| Max Speed (Reverse) | 16.4 km/h | — |
| Pump type | Gear | — |
| Pump Flow | 220.3 LPM | — |
| Relief Pressure | 155.1 bar | — |
| Operating Weight | 12745.9 kg | 12854.8 kg |
| Tipping Load | 10391.8 kg | — |
| Bucket Capacity (Heaped) | 1.9 m³ | — |
| Bucket Capacity (Struck) | 1.6 m³ | — |
| Bucket Width | 274.3 cm | 243.8 cm |
| Breakout Force | 10940.6 kg | 10730 kgf |
| Reach At Max Lift And Dump | 91.4 cm | — |
| Dump Clearance At Max Raise | 274.3 cm | — |
| Turning Radius | 487.7 cm | — |
| Wheelbase | 274.3 cm | 290.0 cm |
| Bucket Hinge Pin | 365.8 cm | — |
| Cab Height | 335.3 cm | 304.8 cm |
| Overall Length | 640.1 cm | — |
| Ground Clearance | 61.0 cm | 61.0 cm |
| Tire Size | 14.5-25 / 20.5-25 | — |
| Engine Model | — | Komatsu SAA6D107E-1 |
| Engine Type | — | Water-cooled, 4-cycle |
| Air Cleaner | — | Dry type with double elements and dust evacuator, plus dust indicator |
| Stroke | — | 453 mm |
| Bore | — | 7.1 cm |
| Service Brake | — | Hydraulically actuated, wet disc brakes actuate on four wheels |
| Raise Lift Arms | — | 5.7 sec |
| Lower Lift Time | — | 3.3 sec |
| Bucket Dump Time | — | 1.6 sec |
| Source | heavyequipments.net archive (imported 2026-10) | heavyequipments.net archive (imported 2026-10) |
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