579C Knuckleboom Loader

579C Knuckleboom Loader

Cat knuckleboom loaders are known for superior multifunction capability, excellent visibility and heavy-duty booms and structures. Now the Cat C Series knuckleboom loaders feature a new more fuel efficient power system, an upgraded hydraulic system for greater reliability and significantly more lift at full reach than previous models. Like the smaller model, the Cat 579C, now has a right-side operator’s cab with a walk-up platform and enlarged doorway for safe access to the cab.

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Engine

Gross Power
174.0hp
Engine Model
Cat® C6.6 ACERT™ Tier 4 Interim
Gross Power @ 1,800 rpm
174.0hp
Gross Power
174mm H2O
Engine Model
Cat® C6.6 ACERT™ Tier 4 Interim
Gross Power - 1,800 rpm
174mm H2O

Operating Specifications

Knuckleboom Length
32.0ft
Swing Speed
9.5RPM
Swing Torque
73800.0lb ft
Maximum Reach - Standard Boom
32ft
Standard Knuckleboom Reach to Pin
32ft
Swing Bearing - Diameter - Ball Path
43.5in
Tail Swing
108.2in
Knuckleboom Length
32ft
Swing Speed
9.5r/min
Swing Torque
73800ft-lb

Weights

Operating Weight
36480.0lb
Counterweight
1440.0lb
Operating Weight without grapple
36480.0lb
Operating Weight - Without Grapple
36480lb
Operating Weight
36480lb
Counterweight
1440lb
Operating Weight - Less Grapple
36480lb

Hydraulic System

Cylinders - Main
two
Cylinders - Stick
one
Hydraulic Pressure - Swing
3500.0psi
Hydraulic Pressure - System
3500.0psi
Cylinders - Stabilizers
four
Hydraulic Oil Flow at 1,800 rpm
230/230 L (60/60 gal)
Cylinders - Main
two
Cylinders - Stick
one
Hydraulic Pressure - Swing
3500psi
Hydraulic Pressure - System
3500psi

Service Refill Capacities

Hydraulic Tank
80.0gal
Fuel Tank
100.0gal
Cooling System
7.5gal
Engine Oil
4.0gal
Swing Drive
2.6gal
Hydraulic Tank
80gal (US)
Fuel Tank
100gal (US)
Cooling System
7.5gal (US)
Engine Oil
4gal (US)
Swing Drive
2.6gal (US)

Dimensions

Height to Top of Cab
161.9in
Stabilizer Pad Size
508 × 711 mm (20 × 28 in)
Stabilizer Reach Below Grade
12.8in
Stabilizer Spread - Maximum Down Reach
166.8in
Stabilizer Spread - Grade
183.8in
Height - Top of Cab
161.9in

Standards

OFPS
cab meets SAE J2267

Shipping Dimensions - Mounted Trailer

Height
161.9in
Width
101.3in

Standard Equipment

  • Electrical
    • 24V system
    • Master disconnect
    • Circuit breaker protection
    • 95 Amp alternator
    • Two (2) 12V maintenance free batteries
    • Standard lighting package: - Two (2) cab mounted halogen light fixtures
    • Electronic engine/machine monitoring system
    • Two (2) 12V power points
    • 20 circuit electric swivel
  • Operator Environment
    • Cab with swing out front window guard (meets SAE J2267)
    • Isolation mountings
    • Dual joystick control (pilot hydraulic actuation) with foot pedal swing
    • Electric stabilizer controls
    • Integrated trailer landing gear control
    • Pilot shut-off button
    • Push button throttle control
    • Reverse slope windshield
    • Skylight
    • Tinted safety glass
    • Sunshade - dual position for front window/skylight
    • High back suspension seat with lumbar support
    • High capacity AC/heater system with outside air intake
    • Defroster fan
    • Windshield wiper/washer
    • Dome light
    • Horn
    • Radio ready - includes speakers and AM/FM antennas
    • CB Radio ready - includes mounting bracket, power and ground wires, antenna cable and antenna mount bracket
    • Product Link ready
    • Cup holder
    • Fire extinguisher mounting bracket
    • Diagnostic port
    • Cell phone storage tray
  • Power Train
    • Cat C6.6 ACERT engine meets U.S. EPA Tier 4 Interim/EU Stage IIIB emission standards
    • Electric fuel priming pump
    • Air precleaner
    • 2-stage air cleaner
    • Enlarged cooling package with isolated cores
    • 378 L (100 U.S. gal) fuel tank
    • Fuel water separator
    • Variable speed fan
  • Hydraulics
    • Twin 140 cm3 (8.54 in3) variable displacement pumps
    • Excavator style “Negacon” system
    • Bar slasher/delimber hydraulic package
    • 302 L (80 U.S. gal) hydraulic tank
    • Electric hydraulic oil fill pump
  • Structure And Subframe
    • 653 kg (1,440 lb) counterweight
    • Fabricated heavy-duty, extended length center mount subframe
    • Flat top subframe deck with bolt-on skid resistant fenders
    • Bolt-on subframe ladder
  • Booms And Sticks
    • 9.8 m (32 ft) reach knuckleboom
    • 229 mm (9 in) grapple mounting knuckle
  • Antifreeze
    • 50% concentration extended life coolant

Optional Equipment

  • Ds Systems
    • Suspension trailer with hydraulic landing gear
    • CTR 320 three-knife delimber
    • CTR 426 four-knife delimber
  • Other Equipment
    • Cat Product Link
    • AM/FM/CD/Satellite radio receiver
    • Long-range front lights on cab
    • Engine compartment lights
    • Additional subframe ladders
    • Auxiliary light package
    • Slasher port adapter fittings
    • Single “V” and double “VV” bolt on heels
    • Single “V” extended and double “VV” extended bolt on heels
    • 305 mm (12 in) grapple mounting knuckle
    • Grapples