John Deere 644D Wheel Loader
Wheel Loader // John Deere
John Deere 644D Bucket
| Breakout Force: | 24430 lbs (11,081 kg) |
| Bucket Capacity - heaped: | 3 cu yds (2 m) |
| Bucket Capacity - struck: | 2.6 cu yds (2 m) |
| Bucket Width: | 8.8 ft (3 m) |
John Deere 644D Dimensions
| Dump Clearance at Max Raise: | 9.8 ft (3 m) |
| Ground Clearance: | 1.7 ft (1 m) |
| Height - Top of Cab: | 10.5 ft (3 m) |
| Hinge Pin - Max Height: | 12.7 ft (4 m) |
| Length with Bucket on Ground: | 23.1 ft (7 m) |
| Reach at Max Lift and Dump: | 3.1 ft (1 m) |
| Wheelbase: | 9.6 ft (3 m) |
| Width Over Tires: | 8.6 ft (3 m) |
John Deere 644D Engine
| Aspiration: | Turbocharged |
| Displacement: | 466 cu in (0 m) |
| Engine Model: | 6-466T |
| Gross Power: | 165 hp (123 kw) |
| Net Power: | 155 hp (116 kw) |
| Number of Cylinders: | 6.0 |
| Power Measured @: | 2200 rpm |
| Torque Measured @: | 1400 rpm |
John Deere 644D Hydraulic System
| Dump Time: | 2 sec |
| Lower Time: | 4.3 sec |
| Pump Flow Capacity: | 63 gal/min (238 l/min) |
| Pump Type: | Gear type pump |
| Raise Time: | 6.1 sec |
| Relief Valve Setting: | 2625 psi |
John Deere 644D Operating Specifications
| Alternator Supplied Amperage: | 42 A |
| Cooling System Fluid Capacity: | 7.4 gal (28 l) |
| Engine Oil Fluid Capacity: | 5.1 gal (19 l) |
| Front Axle/Diff Fluid Capacity: | 6.1 gal (23 l) |
| Fuel Capacity: | 67 gal (254 l) |
| Hydraulic System Fluid Capacity: | 25.1 gal (95 l) |
| Operating Voltage: | 12 V V |
| Operating Weight: | 29320 lbs (13,300 kg) |
| Rear Axle Oscillation: | 22 ° |
| Rear Axle/Diff Fluid Capacity: | 6.1 gal (23 l) |
| Static Tipping Weight: | 25210 lbs (11,435 kg) |
| Tire Size: | 20.5-25 |
| Transmission Fluid Capacity: | 16.5 ft (5 m) |
| Turning Radius: | 9.8 gal (37 l) |
| Max Speed - Forward: | 16.5 ft (5 m) |
John Deere 644D Transmission
| Max Speed - Reverse: | 27.3 mph (44 kph) |
| Number of Forward Gears: | 8.2 mph (13 kph) |
| Number of Reverse Gears: | 4.0 |
| Transmission Type: | 2.0 |
