The John Deere 644B is a wheel loader designed for material handling, loading, stockpiling, and general construction applications. Part of John Deere's B-series wheel loader lineup, the 644B was built for use in aggregate yards, construction sites, and industrial material movement. It features a front-mounted bucket, articulated steering, and a diesel powertrain typical of mid-size wheel loaders from its era. The machine is commonly referenced in equipment databases, parts catalogs, and used equipment listings. Search terms associated with the John Deere 644B include wheel loader, front-end loader, construction loader, and John Deere 644B specifications.
Bucket
John Deere 644B Wheel Loader Bucket specifications
Breakout Force
24,120.00 lbs (10,940.66 kg)
Bucket Capacity - Heaped
2.5 cu yd
Bucket Capacity - Struck
2.05 cu yd
Bucket Width
8.73 ft (2.66 m)
Dump Clearance At Max Raise
9.33 ft (2.84 m)
Dimensions
John Deere 644B Wheel Loader Dimensions specifications
Ground Clearance
1.66 ft (0.51 m)
Height
10.50 ft (3.20 m)
Height To Top Of Cab
10.63 ft (3.24 m)
Hinge Pin - Max Height
12.00 ft (3.66 m)
Length
21.08 ft (6.43 m)
Length With Bucket On Ground
21.10 ft (6.43 m)
Reach At Max Lift And Dump
2.89 ft (0.88 m)
Weight
32,111.00 lbs (14,565.32 kg)
Wheelbase
8.67 ft (2.64 m)
Width
8.50 ft (2.59 m)
Engine
John Deere 644B Wheel Loader Engine specifications
Aspiration
Turbocharged
Displacement
531.00 cu in (8,701.55 cu cm)
Engine Make
2240
Gross Power
160.00 hp (119.31 kw)
Max Torque
432.00 lbs ft (585.71 nm)
Net Power
145.00 hp (108.13 kw)
Number Of Cylinders
6
Power Measured @
2200 rpm
Torque Measured @
1500 rpm
Hydraulic System
John Deere 644B Wheel Loader Hydraulic System specifications
Pump Flow Capacity
58.20 gpm (220.29 lpm)
Pump Type
Gear
Relief Valve Setting
2250 psi
Operational
John Deere 644B Wheel Loader Operational specifications
Alternator Supplied Amperage
42 amps
Cooling System Fluid Capacity
12.30 gal (46.56 l)
Engine Oil Fluid Capacity
5.50 gal (20.82 l)
Front Axle/Diff Fluid Capacity
6.00 gal (22.71 l)
Fuel Capacity
56.00 gal (211.96 l)
Hydraulic System Fluid Capacity
17.50 gal (66.24 l)
Operating Voltage
12 V
Operating Weight
28,100.00 lbs (12,745.96 kg)
Rear Axle Oscillation
22 degrees
Rear Axle/Diff Fluid Capacity
6.30 gal (23.85 l)
Static Tipping Weight
22,905.00 lbs (10,389.55 kg)
Tire Size
14.5-25 / 20.5-25
Transmission Fluid Capacity
9.80 gal (37.09 l)
Turning Radius
15.50 ft (4.72 m)
Transmission
John Deere 644B Wheel Loader Transmission specifications
Max Speed - Forward
25.80 mph (41.52 kph)
Max Speed - Reverse
10.20 mph (16.42 kph)
Number Of Forward Gears
4
Number Of Reverse Gears
2
Transmission Type
Power shift Planetary
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