Caterpillar 579D Log Loader Specs

Category: Log Loaders ➔
Manufacturer: Caterpillar ➔
Model: 579D ➔

Dimensions

Caterpillar 579D Log Loader Dimensions specifications
Height - Top Of Cab	13.26 ft (4.04 m)
Note	579D dimensions are on suspension trailer.
Stabilizer Pad Size	508 711 mm (20 28 in)
Stabilizer Reach Below Grade	15.50 in (39.37 cm)
Stabilizer Spread - Grade	183.80 in (466.85 cm)
Stabilizer Spread - Maximum Down Reach	166.80 in (423.67 cm)

Engine

Caterpillar 579D Log Loader Engine specifications
Engine Model	Cat C4.4 ACERT
Gross Power	173.00 hp (129.01 kw)
Gross Power - 1,800 Rpm	173.00 hp (129.01 kw)

Glk Series Grapples - Glk48

Caterpillar 579D Log Loader Glk Series Grapples - Glk48 specifications
Area (Tip To Tip)	3 ft2
Close	4.50 in (11.43 cm)
Height - Open - Excluding Rotation	45.10 in (114.55 cm)
Height - Open - Including Rotation	66.00 in (167.64 cm)
Note	All specifications are approximate.
Open	48.00 in (121.92 cm)
Weight - Excluding Rotation	1,407.00 lbs (638.21 kg)
Weight - Including Rotation	1,907.00 lbs (865.00 kg)

Glk Series Grapples - Glk55

Caterpillar 579D Log Loader Glk Series Grapples - Glk55 specifications
Area (Tip To Tip)	3.8 ft2
Close	5.00 in (12.70 cm)
Height - Open - Excluding Rotation	46.70 in (118.62 cm)
Height - Open - Including Rotation	68.00 in (172.72 cm)
Note	All specifications are approximate.
Open	54.00 in (137.16 cm)
Weight - Excluding Rotation	1,411.00 lbs (640.02 kg)
Weight - Including Rotation	1,911.00 lbs (866.82 kg)

Hydraulic System

Caterpillar 579D Log Loader Hydraulic System specifications
Cylinders - Main	one
Cylinders - Stabilizers	four
Cylinders - Stick	one
Hydraulic Oil Flow At 1,800 Rpm	230/230 L/min (60/60 gal/min)
Hydraulic Pressure - Swing	3625 psi
Hydraulic Pressure - System	3625 psi

Operating Specifications

Caterpillar 579D Log Loader Operating Specifications specifications
Knuckleboom Length	32.00 ft (9.75 m)
Maximum Reach - Standard Boom	32.00 ft (9.75 m)
Note	*Theoretical
Swing Bearing - Diameter - Ball Path	43.50 in (110.49 cm)
Swing Speed	9.5 rpm
Swing Torque*	73,800.00 lbs ft (100,058.04 nm)
Tail Swing	108.20 in (274.83 cm)

Operational

Caterpillar 579D Log Loader Operational specifications
Operating Weight	36,500.00 lbs (16,556.14 kg)

Service Refill Capacities

Caterpillar 579D Log Loader Service Refill Capacities specifications
Cooling System	7.50 gal (28.39 l)
Def Tank	5.00 gal (18.93 l)
Engine Oil	2.10 gal (7.95 l)
Fuel Tank	100.00 gal (378.50 l)
Hydraulic Tank	80.00 gal (302.80 l)
Swing Drive	2.60 gal (9.84 l)

Shipping Dimensions - Mounted Trailer

Caterpillar 579D Log Loader Shipping Dimensions - Mounted Trailer specifications
Height	159.10 in (404.11 cm)
Width	101.30 in (257.30 cm)

Standards

Caterpillar 579D Log Loader Standards specifications
Ofps	OFPS cab meets SAE J2267

Weights

Caterpillar 579D Log Loader Weights specifications
Counterweight	1,440.00 lbs (653.17 kg)
Operating Weight - Without Grapple	36,500.00 lbs (16,556.14 kg)

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