John Deere 644D Wheel Loader Specs

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

Bucket

John Deere 644D Wheel Loader Bucket specifications
Breakout Force	24,430.00 lbs (11,081.28 kg)
Bucket Capacity - heaped	3.00 cu yd (2.29 cu m)
Bucket Capacity - struck	2.60 cu yd (1.99 cu m)
Bucket Width	8.80 ft (2.68 m)
Dump Clearance at Max Raise	9.80 ft (2.99 m)

Dimensions

John Deere 644D Wheel Loader Dimensions specifications
Ground Clearance	1.70 ft (0.52 m)
Height - Top of Cab	10.50 ft (3.20 m)
Hinge Pin - Max Height	12.70 ft (3.87 m)
Length with Bucket on Ground	23.10 ft (7.04 m)
Reach at Max Lift and Dump	3.10 ft (0.94 m)
Wheelbase	9.60 ft (2.93 m)
Width Over Tires	8.60 ft (2.62 m)

Engine

John Deere 644D Wheel Loader Engine specifications
Aspiration	Turbocharged
Displacement	466.00 cu in (7,636.39 cu cm)
Engine Model	6-466T
Gross Power	165.00 hp (123.04 kw)
Net Power	155.00 hp (115.59 kw)
Number of Cylinders	6
Power Measured @	2200 rpm
Torque Measured @	1400 rpm

Hydraulic System

John Deere 644D Wheel Loader Hydraulic System specifications
Dump Time	2 seconds
Lower Time	4.3 seconds
Pump Flow Capacity	63.00 gpm (238.46 lpm)
Pump Type	Gear type pump
Raise Time	6.1 seconds
Relief Valve Setting	2625 psi

Operating Specifications

John Deere 644D Wheel Loader Operating Specifications specifications
Alternator Supplied Amperage	42 amps
Cooling System Fluid Capacity	7.40 gal (28.01 l)
Engine Oil Fluid Capacity	5.10 gal (19.30 l)
Front Axle/Diff Fluid Capacity	6.10 gal (23.09 l)
Fuel Capacity	67.00 gal (253.60 l)
Hydraulic System Fluid Capacity	25.10 gal (95.00 l)
Operating Voltage	12 volts
Operating Weight	29,320.00 lbs (13,299.34 kg)
Rear Axle Oscillation	22 degrees
Rear Axle/Diff Fluid Capacity	6.10 gal (23.09 l)
Static Tipping Weight	25,210.00 lbs (11,435.08 kg)
Tire Size	20.5-25
Transmission Fluid Capacity	9.80 gal (37.09 l)
Turning Radius	16.50 ft (5.03 m)

Transmission

John Deere 644D Wheel Loader Transmission specifications
Max Speed - Forward	27.30 mph (43.93 kph)
Max Speed - Reverse	8.20 mph (13.20 kph)
Number of Forward Gears	4
Number of Reverse Gears	2
Transmission Type	Power shift planetary

Our Main Office

Construction Equipment Guide
470 Maryland Drive
Fort Washington, PA 19034
800-523-2200

About Us

Construction Equipment Guide covers the nation with its four regional newspapers, offering construction and industry news and information along with new and used construction equipment for sale from dealers in your area. Now we extend those services and information to the internet. Making it as easy as possible to find the news and equipment that you need and want.

Contents Copyrighted 2026, by Construction Equipment Guide, which is a Registered Trademark, registered in the U.S. Patent Office. Registration number 0957323. All rights reserved, nothing may be reprinted or reproduced (including framing) in whole or part without written permission from the publisher. All editorial material, photographs, drawings, letters, and other material will be treated as unconditionally assigned for publication and copyright purposes and are subject to Construction Equipment Guide’s unrestricted right to edit and comment editorially. Contributor articles do not necessarily reflect the policy or opinions of this publication.

Read our privacy policy here.
Mastodon