John Deere
644G
Farm tractor · 1992–1998 · 178 hp
John Deere644G
The John Deere 644G is a farm tractor manufactured from 1992 to 1998. It features a John Deere 6076A engine, and four-post canopy steering. The transmission is a power shift type with 4 forward and 3 reverse.
Engine
| Engine | John Deere 6076A |
|---|---|
| Fuel Type | diesel |
| Cylinders | 6 |
| Cooling | liquid-cooled |
| Turbocharger Status | turbocharged aftercooled diesel |
| Displacement | 466 ci (7.6 L) |
| Bore | 4.56 in (116 mm) |
| Stroke | 4.75 in (121 mm) |
| Power Gross | 178 hp (132.7 kW) |
| Power Net | 170 hp (126.8 kW) |
| Torque Peak | 598 lb-ft (810.9 Nm) |
| Torque Peak | 1,300 RPM |
| Air Cleaner | dry |
| Starter Volts | 12 |
| Starter Type | electric |
| Oil Capacity | 25 qts (23.7 L) |
| Coolant Capacity | 3,000 qts (2,839.2 L) |
| Manufacturer | John Deere |
| Rated | 2,200 RPM |
Transmission
| Transmission Type | power shift |
|---|---|
| Gears | 4 forward and 3 reverse |
| Available Options | 4-speed power shift |
Hydraulics
| Type | open center |
|---|---|
| Pump Flow | 69.5 gpm (263.1 lpm) |
| Pressure | 3,000 psi (206.8 bar) |
Electrical
| Battery Volts | 12 |
|---|---|
| Charging System | alternator |
| Ground | negative |
Dimensions
| Length | 310.4 in (788 cm) |
|---|---|
| Width | 107.6 in (273 cm) |
| Height Cab | 134.7 in (342 cm) |
| Wheelbase | 126 in (320 cm) |
| Front Tread | 85.4 in (216 cm) |
| Rear Tread | 85.4 in (216 cm) |
Weight
| Weight | 35,236 lbs (15,983 kg) |
|---|---|
| Operating | 35,236 lbs (15,983 kg) |
Tires & Tracks
| Front Ag | 20.5-25 |
|---|---|
| Rear Ag | 20.5-25 |
| Front Industrial | 20.5-25, 23.5-25 |
| Rear Industrial | 20.5-25, 23.5-25 |
Fuel
| Capacity | 75 gal (283.9 L) |
|---|
Steering
| Type | four-post canopy |
|---|
Cab
| Cab | available with optional air-conditioning |
|---|