Cat Trailer Mount Knuckleboom Loaders 559D

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

Overview

Engine

Units:

• US

• Metric

Weights

Operating Specifications

Service Refill Capacities

Hydraulic System

Dimensions

Standards

Shipping Dimensions - Mounted Trailer

GLK Series Grapples - GLK48

GLK Series Grapples - GLK55