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519 SM/EHC Stationary Mount Knuckleboom Loader

Caterpillar has a full line of stationary mount loaders for a wide range of mill yard applications. Four models are available with onboard or remote power. Caterpillar stationary mount loaders are completely pre-wired, tested and ready for on-site electric hookup, including installation kits with the required fasteners for mounting to steel or concrete pedestals. And with the Resilient Pad Mounting system, your workday will be productive and comfortable.

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  • Gross Power 75.0 hp
  • Operating Weight 15315.0 lb
  • Fuel Tank 42.0 gal
  • Operating Weight 15315.0 lb

Call 800-637-5000 for rate information


  • Gross Power
    75.0 hp
  • Gross Power
    75 HP


  • Operating Weight
    15315.0 lb
  • Operating Weight
    15315 lb

Service Refill Capacities

  • Fuel Tank
    42.0 gal
  • Fuel Tank
    42 gal (US)

Operating Specifications

  • Operating Weight
    15315.0 lb
  • Knuckleboom Length
    27 ft
  • Grapple Mounting Knuckle Length
    9 in
  • Swing Bearing - Diameter
    43 in
  • Swing Bearing - Gearing
  • Electric Motor
    75 HP
  • Electric Power Supply
    460 Volt: 60 Hz
  • Operating Weight
    15315 lb

Hydraulic System

  • Cylinders - Live Heel
    127 mm X 76 mm (5 in X 3 in)
  • Cylinders - Main
    152 mm X 102 mm (6 in X 4 in)
  • Cylinders - Stick
    152 mm X 102 mm (6 in X 4 in)
  • Hydraulic Flow
    167/125/83 L/min (44/33/22 gpm)
  • Hydraulic Pressure - Swing
    2400 psi
  • Hydraulic Pressure - System
    2200 psi
  • Swing Speed
    8 r/min
  • Hydraulic Flow
    15315 lb


  • Maximum Reach
    30 ft

Operator Station

On standard loaders with operator's station, the hydraulic pilot joystick controls and rocker swing pedal are ergonomically designed for ease of operation and maximum loader control required for the high cycle millyard applications. The operator station is designed with comfort in mind. The spacious cabs feature a large, fully adjustable suspension seat with lumbar support. Fold-up armrests are fully adjustable to allow adjustment of the joystick controls to match the operator for ease of operation, increased performance. Excellent visibility of the work area is provided through large tinted cab windows. Overhead visibility is maximized through the large, tinted Lexan skylight. Operator protection is afforded through the front guard. This swing-out guard is designed for quick and simple access to allow cleaning of the front window.

Mounting System

The Resilient Pad Mounting System includes a set of special rubber isolators on each mounting fastener that absorbs stress in two directions. An additional hydraulic accumulator is built into the main boom cylinder circuit to further absorb peak-load shocks.

Enclosed Components

Weatherproof electric service panels include starters, controls, transformers, circuit breakers and fuse blocks.

Motor Options

Electric motors range in horsepower from 75 to 100 hp and are totally enclosed and rated for severe duty. Power supply wiring packages provide for 440V/60Hz US or 575V/60Hz Canadian service.

Boom Length Options

Heavy-duty boom options range in length from 7.6 m to 10.9m (25' to 36') for handling a variety of tree lengths.

Standard Equipment:

  • Motor Power Supply
    • Electric Motor, 56 kW (75 HP) @ 1800 RPM
    • 460 Volt (60 Hz) Electric Power Supply
    • Four (4) Ring High Voltage Collector Ring
    • Service Panel, NEMA 12 Enclosure
    • Pump Drive, Direct Through Flex Coupling
    • Across-the-line Magnetic Starting System
    • Turntable Power Supply Mounting
  • Hydraulic System
    • Three (3) In-Line Gear Pumps
    • Radial Piston Swing Motor
    • Continuous Rotation
    • Electro Hydraulic (EHC) Controls
    • Single Element Return (3 mic) Filtration
    • Filtration Bypass Indicators
    • Diagnostic Nipples @ Pump for serviceability
  • Booms
    • 8.2 m (27') Knuckleboom
    • 22.8 cm (9”) Grapple Mounting Knuckle
  • Structural
    • Steel Mounting

Optional Equipment:

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