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579D Knuckleboom Loader

Product Description

For years, Cat® knuckleboom loaders have been known for superior hydraulic performance in tough logging applications, heavy-duty boom and structures that are built to last, and fuel efficient engines that provide impressive torque characteristics. A complete factory installed delimber slasher (DS) package ensures you have the right grapple, delimber, and trailer combination for any job.

Specifications
Us
Metric
Engine
Gross Power
173 hp
129.3 kW
Engine Model
Cat C4.4 ACERT
Gross Power - 1,800 rpm
173 hp
129.3 kW
Weights
Operating Weight
36500 lb
16556 kg
Counterweight
1440 lb
653 kg
Operating Weight - Without Grapple
36500 lb
16556 kg
Operating Specifications
Knuckleboom Length
32 ft
9.8 m
Swing Speed
9.5 r/min
9.5 r/min
Note
*Theoretical
Maximum Reach - Standard Boom
32 ft
9.8 m
Tail Swing
108.2 in
2750 mm
Swing Torque*
73800 ft·lbf
100360 N·m
Swing Bearing - Diameter - Ball Path
43.5 in
1105 mm
Service Refill Capacities
Hydraulic Tank
80 gal (US)
302 l
Fuel Tank
100 gal (US)
378 l
Engine Oil
2.1 gal (US)
8 l
Swing Drive
2.6 gal (US)
4 l
Cooling System
7.5 gal (US)
29 l
Hydraulic System
Hydraulic Pressure - System
3625 psi
24994 kPa
Cylinders - Stick
one
Hydraulic Pressure - Swing
3625 psi
24994 kPa
Hydraulic Oil Flow at 1,800 rpm
230/230 L/min (60/60 gal/min)
Cylinders - Stabilizers
four
Cylinders - Main
one
Dimensions
Stabilizer Spread - Maximum Down Reach
166.8 in
4237 mm
Stabilizer Pad Size
508 × 711 mm (20 × 28 in)
Stabilizer Reach Below Grade
15.5 in
394 mm
Height - Top of Cab
159.1 in
4041 mm
Stabilizer Spread - Grade
183.8 in
4670 mm
Standards
OFPS
OFPS cab meets SAE J2267
Shipping Dimensions - Mounted Trailer
Width
101.3 in
2573 mm
Height
159.1 in
4041 mm
GLK Series Grapples - GLK48
Height - Open - Excluding Rotation
45.1 in
1146 mm
Weight - Excluding Rotation
1407 lb
638 kg
GLK Series Grapples - GLK55
Weight - Excluding Rotation
1411 lb
640 kg
GLK Series Grapples - GLK48
Close
4.5 in
114 mm
GLK Series Grapples - GLK55
Area (tip to tip)
3.8 ft²
1.15 m²
Close
5 in
127 mm
Weight - Including Rotation
1911 lb
867 kg
GLK Series Grapples - GLK48
Height - Open - Including Rotation
66 in
1685 mm
GLK Series Grapples - GLK55
Open
54 in
1372 mm
GLK Series Grapples - GLK48
Note
All specifications are approximate.
Service Refill Capacities
DEF Tank
5 gal (US)
19 l
GLK Series Grapples - GLK48
Area (tip to tip)
3 ft²
0.91 m²
Open
48 in
1219 mm
Dimensions
Note
579D dimensions are on suspension trailer.
GLK Series Grapples - GLK55
Height - Open - Including Rotation
68 in
1724 mm
GLK Series Grapples - GLK48
Weight - Including Rotation
1907 lb
865 kg
GLK Series Grapples - GLK55
Height - Open - Excluding Rotation
46.7 in
1186 mm
Note
All specifications are approximate.
Standard/Optional
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