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579D Knuckleboom Loader
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Specifications

Operating Specifications

Knuckleboom Length
32 ft
Swing Speed
9.5 RPM
Maximum Reach (standard boom)
32 ft
Standard Knuckleboom Reach to Pin
*Theoretical ft
Swing Bearing Diameter (ball path)
43.5 in
Swing Torque
73800 lb ft
Tailswing
108.2 in

Service Refill Capacities

Hydraulic Tank
80 gal
Fuel Tank
100 gal
Cooling System
7.5 gal
Engine Oil
2.1 gal
Swing Drive
2.6 gal

Shipping Dimensions (mounted trailer)

Height
159.1 in
Width
101.3 in

Weights

Operating Weight
36500 lb
Counterweight
1440 lb
Operating Weight without grapple
36500 lb

Standards

OFPS
OFPS cab meets SAE J2267

Engine

Gross Power
173 hp
Engine Model
Cat C4.4 ACERT
Gross Power @ 1,800 rpm
173 hp

Dimensions

Stabilizer Pad Size
508 × 711 mm (20 × 28 in)
Stabilizer Reach Below Grade
15.5 in
Stabilizer Spread at Maximum Down Reach
166.8 in
Stabilizer Spread at Grade
183.8 in
Height to Top of Cab
159.1 in

Hydraulic System

Cylinders - Main
one
Cylinders - Stick
one
Hydraulic Pressure - Swing
3625 psi
Hydraulic Pressure - System
3625 psi
Cylinders - Stabilizers
four
Hydraulic Oil Flow @ 1,800 rpm
230/230 L/min (60/60 gal/min)