John Deere 644J High-lift
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Contents:
Bucket
| Dump Clearance At Max Raise | 11.08 ft in (3380 mm) |
| Bucket Capacity - Heaped | 4 yd3 (3 m3) |
| Bucket Width | 9.75 ft in (2971.8 mm) |
| Breakout Force | 30574 lb (136 kN) |
Dimensions
| Ground Clearance | 1.5 ft in (460 mm) |
| Length With Bucket On Ground | 28 ft in (8530 mm) |
| Height To Top Of Cab | 11.17 ft in (3400 mm) |
| Wheelbase | 10.5 ft in (3200 mm) |
| Hinge Pin - Max Height | 15 ft in (4570 mm) |
| Reach At Max Lift And Dump | 3.83 ft in (1170 mm) |
Engine
| Number Of Cylinders | 6 |
| Engine Make | 2240 |
| Engine Model | 6068H |
| Net Power | 185 hp (138 kw) |
| Power Measured @ | 2200 rpm |
| Max Torque | 749 lb ft (1016 Nm) |
| Displacement | 414 cu in (6.8 L) |
| Torque Measured @ | 1400 rpm |
| Aspiration | Turbocharged charge air cooled |
| Torque Rise | 55 % |
Operational
| Operating Weight | 40620 lb (18425 kg) |
| Fuel Capacity | 93 gal (352 L) |
| Hydraulic System Fluid Capacity | 31 gal (117 L) |
| Engine Oil Fluid Capacity | 6.5 gal (24.5 L) |
| Cooling System Fluid Capacity | 7.8 gal (29.5 L) |
| Transmission Fluid Capacity | 7.1 gal (26.5 L) |
| Front Axle/Diff Fluid Capacity | 5.9 gal (22 L) |
| Rear Axle/Diff Fluid Capacity | 5.9 gal (22 L) |
| Static Tipping Weight | 27689 lb (12560 kg) |
| Turning Radius | 18 ft in (5.5 mm) |
| Operating Voltage | 24 V |
| Alternator Supplied Amperage | 80 amps |
| Rear Axle Oscillation | 24 degrees |
| Tire Size | 23.5 R25 |
Transmission
| Transmission Type | Automatic Powershift |
| Number Of Forward Gears | 4 |
| Number Of Reverse Gears | 3 |
| Max Speed - Forward | 22 mph (35.4 km/h) |
| Max Speed - Reverse | 15.5 mph (25 km/h) |
Hydraulic System
| Relief Valve Setting | 3600 psi (24800 kPa) |
| Pump Flow Capacity | 68 gal/min (257 L/min) |
| Raise Time | 5.9 sec |
| Dump Time | 1.9 sec |
| Lower Time | 2.8 sec |
| Pump Type | Variable axial piston |
