John Deere 644K Wheel Loader

Bucket

Breakout – Bucket 15378 (33903) kgf (lbf)
Bucket Capacity – Smallest 4.06 yd3 (3.1 m3)
Largest Bucket Capacity 4.19 yd3 (3.2 m3)

Dimensions

Ground Clearance 18.15 in (461 mm)
Length With Bucket On Ground 27.24 ft in (8300 mm)
Width Over Tires 9.44 ft in (2875 mm)
Wheelbase 10.7 ft in (3260 mm)
Hinge Pin – Max Height 13.52 ft in (4120 mm)
Reach At Max Lift And Dump 5.29 ft in (1610 mm)
Turning Circle 43.57 ft in (13280 mm)
Height Over Cab 11.26 ft in (3430 mm)

Engine Details

Pump Piston
Engine Output-Net 232 hp (173 kw)
Transmission Type Powershift
Engine Make John Deere
Engine Model PowerTech PSS 6090
Torque 783.3 lb ft (1062 Nm)
Rated Speed 1700 rpm
Displacement 549.3 cu in (9 L)
Torque Rise 56 %
System Voltage 24 V
Emission Level Tier 4
Alternator 130 amps

Driveline

Ride Control System Optional
Service Brake Type Wet Disc
Parking Brake Type Wet Multi Disc – Transmission
Differential Lock Front- Locking, Rear- Open
Service Brake Actuation Hydraulic
Tire Size – Standard 23.5 R25
Service Brake – Location Axle Inboard

Capacities

Hydraulic Tank 27.8 gal (105.2 L)
Heaped Capacity 4.2 yd3 (3.2 m3)
Transmission 6.1 gal (23 L)

Operational Specs

Operating Weight 41186.8 lb (18682 kg)
Fuel Tank Capacity 104.9 gal (397 L)
Front Axle/Diff Fluid Capacity 5.9 gal (22 L)
Rear Axle/Diff Fluid Capacity 5.9 gal (22 L)

Transmission

Pump Flow 78.5 gal/min (297 L/min)
System Pressure 251.7 psi (1735.2 kPa)
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