SPECS / COMPARISON
John Deere 644B vs Komatsu WA250PZ-6 Quick Coupler
A detailed comparison of the John Deere 644B and the Komatsu WA250PZ-6 Quick Coupler. Click a model name to view its full specifications.
Weight
John Deere 644B12745.9 kg (28100 lbs)
Komatsu WA250PZ-6 Quick Coupler12854.8 kg (28340 lbs)
Operating Weight
John Deere 644B12745.9 kg (28100 lbs)
Komatsu WA250PZ-6 Quick Coupler12854.8 kg (28340 lbs)
| Specification | John Deere 644B Wheel Loaders | Komatsu WA250PZ-6 Quick Coupler Wheel Loaders |
|---|---|---|
| Type | Wheel Loader | Wheel Loader |
| Horsepower | 108.1 kW (145 hp) | — |
| Weight | 12745.9 kg (28100 lbs) | 12854.8 kg (28340 lbs) |
| Tipping Capacity | 10391.8 kg (22910 lbs) | — |
| Max Speed | 41.5 km/h (25.8 mph) | — |
| No Of Cylinders | 6 | 2 |
| Aspiration | Turbocharged | Turbocharged, aftercooled |
| Displacement | 8701.6 cc (531 cu in.) | 6690.9 cc (408.3 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) | 186.2 l (49.2 gal) |
| Engine Oil Capacity | 20.8 l (5.5 gal) | 23.1 l (6.1 gal) |
| Cooling Capacity | 46.6 l (12.3 gal) | 22.3 l (5.9 gal) |
| Hydraulic System Capacity | 66.2 l (17.5 gal) | 67.0 l (17.7 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 | 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 (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) | 12854.8 kg (28340 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) | 243.8 cm (96 in) |
| Breakout Force | 10940.6 kg (24120 lbs) | 10730 kgf |
| 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) | 290.0 cm (114.18 in) |
| Bucket Hinge Pin | 365.8 cm (144 in) | — |
| Cab Height | 335.3 cm (132 in) | 304.8 cm (120 in) |
| Overall Length | 640.1 cm (252 in) | — |
| Ground Clearance | 61.0 cm (24 in) | 61.0 cm (24 in) |
| 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 (2.8 in) |
| 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 |
Values come from the manufacturer-sourced model files; empty cells mean the property is not published for that model. No performance ranking is applied.