579C Knuckleboom Loader

Overview
Gross Power
174 hp
Knuckleboom Length
32 ft
Operating Weight
36,480 lb

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.

Engine

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

Operating Specifications

Knuckleboom Length
32 ft
Swing Speed
10 RPM
Swing Torque
73,800 lb ft
Maximum Reach - Standard Boom
32 ft
Standard Knuckleboom Reach to Pin
32 ft
Swing Bearing - Diameter - Ball Path
44 in
Tail Swing
108 in
Knuckleboom Length
32 ft
Swing Speed
10 r/min
Swing Torque
73,800 ft-lb

Weights

Operating Weight
36,480 lb
Counterweight
1,440 lb
Operating Weight without grapple
36,480 lb
Operating Weight - Without Grapple
36,480 lb
Operating Weight
36,480 lb
Counterweight
1,440 lb
Operating Weight - Less Grapple
36,480 lb

Hydraulic System

Cylinders - Main
two
Cylinders - Stick
one
Hydraulic Pressure - Swing
3,500 psi
Hydraulic Pressure - System
3,500 psi
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
3,500 psi
Hydraulic Pressure - System
3,500 psi

Service Refill Capacities

Hydraulic Tank
80 gal
Fuel Tank
100 gal
Cooling System
8 gal
Engine Oil
4 gal
Swing Drive
3 gal
Hydraulic Tank
80 gal (US)
Fuel Tank
100 gal (US)
Cooling System
8 gal (US)
Engine Oil
4 gal (US)
Swing Drive
3 gal (US)

Dimensions

Height to Top of Cab
162 in
Stabilizer Pad Size
508 × 711 mm (20 × 28 in)
Stabilizer Reach Below Grade
13 in
Stabilizer Spread - Maximum Down Reach
167 in
Stabilizer Spread - Grade
184 in
Height - Top of Cab
162 in

Standards

OFPS
cab meets SAE J2267

Shipping Dimensions - Mounted Trailer

Height
162 in
Width
101 in

Hydraulics

Power Train

Operator Station

Electronics

Structure and Subframe

Boom and Stick

Grapples

Delimber/Slasher Package

Owning and Operating Costs

Serviceability

Customer Support

Sustainability

  • 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
  • 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
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