John Deere 644H MH Wheel Loader
Wheel Loader // John Deere
John Deere 644H MH Bucket
| Breakout Force: | 34340 lbs (15,577 kg) |
| Bucket Capacity - heaped: | 4.5 cu yds (3 m) |
| Bucket Capacity - struck: | 3.8 cu yds (3 m) |
| Bucket Width: | 10 ft (3 m) |
John Deere 644H MH Dimensions
| Dump Clearance at Max Raise: | 9.8 ft (3 m) |
| Ground Clearance: | 1.6 ft (0 m) |
| Height - Top of Cab: | 11.2 ft (3 m) |
| Hinge Pin - Max Height: | 13.7 ft (4 m) |
| Length with Bucket on Ground: | 25.7 ft (8 m) |
| Reach at Max Lift and Dump: | 3.5 ft (1 m) |
| Wheelbase: | 10.5 ft (3 m) |
| Width Over Tires: | 9.5 ft (3 m) |
John Deere 644H MH Engine
| Aspiration: | Turbocharger with Aftercooler |
| Displacement: | 496 cu in (0 m) |
| Engine Model: | 6081H |
| Gross Power: | 212 hp (158 kw) |
| Net Power: | 180 hp (134 kw) |
| Number of Cylinders: | 6.0 |
| Power Measured @: | 2200 rpm |
| Torque Measured @: | 1300 rpm |
| Torque Rise: | 0.4 |
John Deere 644H MH Hydraulic System
| Dump Time: | 1.2 sec |
| Lower Time: | 3 sec |
| Pump Flow Capacity: | 74 gal/min (280 l/min) |
| Pump Type: | Piston Pump |
| Raise Time: | 6 sec |
| Relief Valve Setting: | 3600 psi |
John Deere 644H MH Operating Specifications
| Alternator Supplied Amperage: | 55 A |
| Cooling System Fluid Capacity: | 7.7 gal (29 l) |
| Engine Oil Fluid Capacity: | 6.7 gal (25 l) |
| Front Axle/Diff Fluid Capacity: | 7.2 gal (27 l) |
| Fuel Capacity: | 90 gal (341 l) |
| Hydraulic System Fluid Capacity: | 31 gal (117 l) |
| Operating Voltage: | 24 V V |
| Operating Weight: | 38927 lbs (17,657 kg) |
| Rear Axle Oscillation: | 26 ° |
| Rear Axle/Diff Fluid Capacity: | 7.2 gal (27 l) |
| Static Tipping Weight: | 30906 lbs (14,019 kg) |
| Tire Size: | 23.5-25 |
| Transmission Fluid Capacity: | 18.1 ft (6 m) |
| Turning Radius: | 6.9 gal (26 l) |
| Max Speed - Forward: | 18.1 ft (6 m) |
John Deere 644H MH Transmission
| Max Speed - Reverse: | 24 mph (39 kph) |
| Number of Forward Gears: | 16.4 mph (26 kph) |
| Number of Reverse Gears: | 4.0 |
| Transmission Type: | 3.0 |
