Categories ↠ Wheel Loaders ↠ John Deere 644K

John Deere 644K Wheel Loader

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

The John Deere 644K is a wheel loader designed for material handling, loading, stockpiling, and general construction applications. It is part of John Deere's K-Series wheel loader line and is commonly used in aggregate yards, construction sites, roadwork, and industrial material movement. The 644K features a front-mounted loader bucket, articulated steering, and a diesel powertrain configured for productivity and maneuverability in confined work areas. Typical uses include loading trucks, moving bulk materials, and site cleanup. As a heavy equipment reference model, the 644K is recognized for its role in mid-size wheel loader operations across construction and material handling sectors.

See all John Deere 644Ks for sale

General Specifications

Bucket Capacity	4.0 - 4.25 (3.1 - 3.2) Starting 2019 Model Year
Engine Power	232 (173) Starting 2019 Model Year
Engine type	Deere PSX 6090 Starting 2019 Model Year
Max Dump Height	9.7 (2.9) Starting 2019 Model Year
Operating Weight	41,188 (18,682) Starting 2019 Model Year

Bucket

Breakout Force	33,903 lbs (15,378 kg)
Bucket Capacity - Smallest	4 cu yd (3 cu m)
Dump Clearance at Max Raise	10 ft (3 m)
Largest bucket capacity	4 cu yd (3 cu m)

Capacities

Heaped Capacity	4 cu yd (3 cu m)
Hydraulic Tank	28 gal (105 l)
Transmission	6 gal (23 l)

Dimensions

Height - Top of Cab	11 ft (3 m)
Hinge Pin - Max Height	14 ft (4 m)
Length with Bucket on Ground	27 ft (8 m)
Reach at Max Lift and Dump	5 ft (2 m)
Turning Circle	44 ft (13 m)
Wheelbase	11 ft (3 m)
Width Over Tires	10 ft (3 m)

Driveline

Differential lock	Front- Locking Rear- Open
Parking Brake Type	Wet Multi Disc - Transmission
Ride control system	Optional
Service Brake - Location	Axle Inboard
Service Brake Actuation	Hydraulic
Service Brake Type	Wet Disc
Tire size - Standard	23.5 R25

Engine

Alternator	130 amps
Displacement	549 cu in (9,001 cu cm)
Emission level	Tier 4
Engine Make	John Deere
Engine Model	PowerTech PSS 6090
Engine Output-Net	232 hp (173 kw)
Make	Deere PowerTech
Net Power	232 hp (173 kw)
Pump	Piston
Rated Speed	1700 rpm
System Voltage	24 V
Torque	783 lbs ft (1,062 nm)
Torque Rise	56%
Transmission Type	Powershift

Operating Specifications

Front Axle/Diff Fluid Capacity	6 gal (22 l)
Fuel Capacity	105 gal (397 l)
Operating Weight	41,187 lbs (18,682 kg)
Rated Bucket Capacity	4 cu yd (3 cu m)
Rear Axle/Diff Fluid Capacity	6 gal (22 l)

Transmission

Pump Flow	79 gpm (297 lpm)
System Pressure	251.7 psi

Weights

Operating Weight

41,188 lbs (18,683 kg)

John Deere 644Ks currently for sale

A 2020 John Deere 644K From CDM Inc. for Call for Price

A 2018 John Deere 644K From Brandt Tractor LTD for $149,947.00 USD

A 2012 John Deere 644K From McCoy Construction & Forestry for $129,000.00 USD

A 2012 John Deere 644K From Pittman Tractor Company, Inc. for Call for Price

A 2017 John Deere 644K From Pape Machinery for $139,500.00 USD

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