New Knuckleboom Loaders

579D

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Specifications

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US
Metric

Overview

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
Maximum Reach - Standard Boom 32.0 ft 9.8 m
Note *Theoretical *Theoretical
Swing Bearing - Diameter - Ball Path 43.5 in 1105.0 mm
Swing Torque* 73800.0 ft·lbf 100360.0 N·m
Tail Swing 108.2 in 2750.0 mm

Service Refill Capacities

Hydraulic Tank 80.0 gal (US) 302.0 l
Fuel Tank 100.0 gal (US) 378.0 l
Cooling System 7.5 gal (US) 29.0 l
Engine Oil 2.1 gal (US) 8.0 l
Swing Drive 2.6 gal (US) 4.0 l
DEF Tank 5.0 gal (US) 19.0 l

Hydraulic System

Cylinders - Main one one
Cylinders - Stabilizers four four
Cylinders - Stick one one
Hydraulic Oil Flow at 1,800 rpm 230/230 L/min (60/60 gal/min) 230/230 L/min (60/60 gal/min)
Hydraulic Pressure - Swing 3625.0 psi 24994.0 kPa
Hydraulic Pressure - System 3625.0 psi 24994.0 kPa

Dimensions

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
Stabilizer Spread - Maximum Down Reach 166.8 in 4237.0 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

Height 159.1 in 4041.0 mm
Width 101.3 in 2573.0 mm

GLK Series Grapples - GLK48

Area (tip to tip) 3.0 ft² 0.91 m²
Close 4.5 in 114.0 mm
Height - Open - Excluding Rotation 45.1 in 1146.0 mm
Height - Open - Including Rotation 66.0 in 1685.0 mm
Note All specifications are approximate. All specifications are approximate.
Open 48.0 in 1219.0 mm
Weight - Excluding Rotation 1407.0 lb 638.0 kg
Weight - Including Rotation 1907.0 lb 865.0 kg

GLK Series Grapples - GLK55

Area (tip to tip) 3.8 ft² 1.15 m²
Close 5.0 in 127.0 mm
Height - Open - Excluding Rotation 46.7 in 1186.0 mm
Height - Open - Including Rotation 68.0 in 1724.0 mm
Note All specifications are approximate. All specifications are approximate.
Open 54.0 in 1372.0 mm
Weight - Excluding Rotation 1411.0 lb 640.0 kg
Weight - Including Rotation 1911.0 lb 867.0 kg

Benefits & Features

Performance

The Cat® C4.4 ACERT™ U.S. EPA Tier 4 Final engine provides equivalent power (129.3 kW/173 hp) and optimized performance compared to C Series while minimizing overall fluid consumption
Advanced controls manage pump and engine interface to optimize performance and fuel efficiency
Leading hydraulic multi-functioning capability enables operator to lift, swing, and rotate grapple simultaneously without impairing performance

Efficiency

Auto idle minimizes fuel consumption when machine is on and not actively working
High capacity cooling system only pulls in cool external air to maximize efficiency
Electrically controlled variable speed fan is modulated to provide cooling only as required, reducing fluid consumption

Comfort

Smooth hydraulic controls and superior balance provide market leading comfort and controllability
High capacity HVAC system provides dependable cooling and heating for maximum comfort
Improved stabilizer controls to equalize stabilizer actuation resulting in optimized uniformity of footing in varying ground conditions

Safety

Stabilizer movement alarm alerts bystanders of stabilizer movement
Pilot enable alarm alerts bystanders when pilot function is engaged
Ground level access of engine, fuel, pilot, and case drain filters as well as electrical service box

Durability

Reinforced fabricated booms with optimized cross sections designed to withstand heavy side-to-side delimbing applications and maximize lift capability
Field proven cooling system keeps engine and robust hydraulic system cool, extending component life
Larger diameter pins feature heavy-duty plating for improved durability and excluder seals to retain grease and keep free of SP contaminant

Serviceability

Single cylinder main boom has fewer parts to service than traditional dual cylinder lift system
Standard electric fill pump for hydraulic oil is at ground level for safe, easy service
Hinged doors provide industry-leading access to core components, daily check points, and service locations

Cat Work Tools

Optimized Cat XT™-6 ToughGuard™ hose routings on GLK Series grapple designed to minimize loosening of fittings and improve hose life
Larger GLK Series cylinder pins and bushings reduce bearing stress by 25 percent
Available now in both a TW “Tapered Wide” and SN “Straight Narrow,” the GLK Series grapple is suitable for additional applications
Standard hold valves on GLK Series log grapples improve log retention
GLK Series grapples feature optional three port swivel which allows mounting of grapple saw
DLK426 delimber knives now have larger diameter pins that reduce bearing stress by 12 percent

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