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.
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Engine
Gross Power
173.0 HP
129.3 kW
Engine Model
Cat C4.4 ACERT
Cat C4.4 ACERT
Gross Power - 1,800 rpm
173.0 HP
129.3 kW
Weights
Operating Weight
36500.0 lb
16556.0 kg
Counterweight
1440.0 lb
653.0 kg
Operating Weight - Without Grapple
36500.0 lb
16556.0 kg
Operating Specifications
Knuckleboom Length
32.0 ft
9.8 m
Swing Speed
9.5 r/min
9.5 r/min
Note
*Theoretical
*Theoretical
Maximum Reach - Standard Boom
32.0 ft
9.8 m
Tail Swing
108.2 in
2750.0 mm
Swing Torque*
73800.0 ft·lbf
100360.0 N·m
Swing Bearing - Diameter - Ball Path
43.5 in
1105.0 mm
Service Refill Capacities
Hydraulic Tank
80.0 gal (US)
302.0 l
Fuel Tank
100.0 gal (US)
378.0 l
Engine Oil
2.1 gal (US)
8.0 l
Swing Drive
2.6 gal (US)
4.0 l
Cooling System
7.5 gal (US)
29.0 l
DEF Tank
5.0 gal (US)
19.0 l
Hydraulic System
Hydraulic Pressure - System
3625.0 psi
24994.0 kPa
Cylinders - Stick
one
one
Hydraulic Pressure - Swing
3625.0 psi
24994.0 kPa
Hydraulic Oil Flow at 1,800 rpm
230/230 L/min (60/60 gal/min)
230/230 L/min (60/60 gal/min)
Cylinders - Stabilizers
four
four
Cylinders - Main
one
one
Dimensions
Stabilizer Spread - Maximum Down Reach
166.8 in
4237.0 mm
Stabilizer Pad Size
508 × 711 mm (20 × 28 in)
508 × 711 mm (20 × 28 in)
Stabilizer Reach Below Grade
15.5 in
394.0 mm
Height - Top of Cab
159.1 in
4041.0 mm
Stabilizer Spread - Grade
183.8 in
4670.0 mm
Note
579D dimensions are on suspension trailer.
579D dimensions are on suspension trailer.
Standards
OFPS
OFPS cab meets SAE J2267
OFPS cab meets SAE J2267
Shipping Dimensions - Mounted Trailer
Width
101.3 in
2573.0 mm
Height
159.1 in
4041.0 mm
GLK Series Grapples - GLK48
Height - Open - Excluding Rotation
45.1 in
1146.0 mm
Weight - Excluding Rotation
1407.0 lb
638.0 kg
Close
4.5 in
114.0 mm
Height - Open - Including Rotation
66.0 in
1685.0 mm
Note
All specifications are approximate.
All specifications are approximate.
Area (tip to tip)
3.0 ft²
0.91 m²
Open
48.0 in
1219.0 mm
Weight - Including Rotation
1907.0 lb
865.0 kg
GLK Series Grapples - GLK55
Weight - Excluding Rotation
1411.0 lb
640.0 kg
Area (tip to tip)
3.8 ft²
1.15 m²
Close
5.0 in
127.0 mm
Weight - Including Rotation
1911.0 lb
867.0 kg
Open
54.0 in
1372.0 mm
Height - Open - Including Rotation
68.0 in
1724.0 mm
Height - Open - Excluding Rotation
46.7 in
1186.0 mm
Note
All specifications are approximate.
All specifications are approximate.