A benchmark for the industry, Caterpillar knuckleboom loaders set new standards in performance, controllability and safety.

Trailer Mount Knuckleboom Loaders

559D

Gross Power
173 HP (129.3 kW)

Knuckleboom Length
32 ft (9.8 m)
Operating Weight
33800 lb (15331 kg)

579D

Gross Power
173 HP (129.3 kW)

Knuckleboom Length
32 ft (9.8 m)
Operating Weight
36500 lb (16556 kg)