John Deere 644B Wheel Loader
Wheel Loader // John Deere
John Deere 644B Bucket
| Breakout Force: | 24120 lbs (10,941 kg) |
| Bucket Capacity - heaped: | 2.5 cu yds (2 m) |
| Bucket Capacity - struck: | 2.1 cu yds (2 m) |
| Bucket Width: | 8.8 ft (3 m) |
John Deere 644B Dimensions
| Dump Clearance at Max Raise: | 9.4 ft (3 m) |
| Ground Clearance: | 1.7 ft (1 m) |
| Height - Top of Cab: | 10.7 ft (3 m) |
| Hinge Pin - Max Height: | 12 ft (4 m) |
| Length with Bucket on Ground: | 21.1 ft (6 m) |
| Reach at Max Lift and Dump: | 2.9 ft (1 m) |
| Wheelbase: | 8.7 ft (3 m) |
John Deere 644B Engine
| Aspiration: | Turbocharged |
| Displacement: | 531 cu in (0 m) |
| Gross Power: | 160 hp (119 kw) |
| Net Power: | 145 hp (108 kw) |
| Number of Cylinders: | 6.0 |
| Power Measured @: | 2200 rpm |
| Torque Measured @: | 1500 rpm |
John Deere 644B Hydraulic System
| Pump Flow Capacity: | 58.2 gal/min (220 l/min) |
| Pump Type: | Gear |
| Relief Valve Setting: | 2250 psi |
John Deere 644B Operating Specifications
| Alternator Supplied Amperage: | 42 A |
| Cooling System Fluid Capacity: | 12.3 gal (47 l) |
| Engine Oil Fluid Capacity: | 5.5 gal (21 l) |
| Front Axle/Diff Fluid Capacity: | 6 gal (23 l) |
| Fuel Capacity: | 56 gal (212 l) |
| Hydraulic System Fluid Capacity: | 17.5 gal (66 l) |
| Operating Voltage: | 12 V V |
| Operating Weight: | 28100 lbs (12,746 kg) |
| Rear Axle Oscillation: | 22 ° |
| Rear Axle/Diff Fluid Capacity: | 6.3 gal (24 l) |
| Static Tipping Weight: | 22905 lbs (10,390 kg) |
| Tire Size: | 14.5-25 / 20.5-25 |
| Transmission Fluid Capacity: | 15.5 ft (5 m) |
| Turning Radius: | 9.8 gal (37 l) |
| Max Speed - Forward: | 15.5 ft (5 m) |
John Deere 644B Transmission
| Max Speed - Reverse: | 25.8 mph (42 kph) |
| Number of Forward Gears: | 10.2 mph (16 kph) |
| Number of Reverse Gears: | 4.0 |
| Transmission Type: | 2.0 |
