John Deere 644B Wheel Loader Specs

Category: Wheel Loaders ➔
Manufacturer: John Deere ➔
Model: 644B ➔

John Deere 644B wheel loader is a mid-size construction machine designed for material handling, loading, stockpiling, and site preparation. The 644B is part of John Deere's B-series wheel loader line and is commonly used in aggregate yards, construction sites, and industrial material yards. It features a front-mounted loader bucket, articulated steering, and a diesel powertrain suited to repetitive loading cycles. Typical applications include gravel, sand, soil, and demolition debris handling. The 644B is recognized for its serviceability, operator visibility, and compatibility with a range of attachments and bucket configurations used in general earthmoving operations.

Bucket

John Deere 644B Wheel Loader Bucket specifications
Breakout Force	24,120.00 lbs (10,940.66 kg)
Bucket Capacity - heaped	2.50 cu yd (1.91 cu m)
Bucket Capacity - struck	2.10 cu yd (1.61 cu m)
Bucket Width	8.80 ft (2.68 m)
Dump Clearance at Max Raise	9.40 ft (2.87 m)

Dimensions

John Deere 644B Wheel Loader Dimensions specifications
Ground Clearance	1.70 ft (0.52 m)
Height - Top of Cab	10.70 ft (3.26 m)
Hinge Pin - Max Height	12.00 ft (3.66 m)
Length with Bucket on Ground	21.10 ft (6.43 m)
Reach at Max Lift and Dump	2.90 ft (0.88 m)
Wheelbase	8.70 ft (2.65 m)

Engine

John Deere 644B Wheel Loader Engine specifications
Aspiration	Turbocharged
Displacement	531.00 cu in (8,701.55 cu cm)
Gross Power	160.00 hp (119.31 kw)
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

Operating Specifications

John Deere 644B Wheel Loader Operating Specifications 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 volts
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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