Negative Brake: A spring-set, hydraulically released multipledisc brake is mounted on the hoist motor and operated through acounter-balance valve. (Positive free fall brake is optional)Drum Lock: External ratchet for locking drum
Main pumps: 3 variable displacement piston pumpsControl: Full-flow hydraulic control system for infinitely variablepressure to all winches, propel and swing. Controls respondinstantly to the touch, delivering smooth function operation.Cooling: Oil-to-air heat exchanger (plate-fin type)Filtration: Full-flow and bypass type with replaceable element
Powered by a hydraulic motor through a planetary reducer.Brake: A spring-set, hydraulically released multiple-disc brakeis mounted on the boom hoist motor and operated through acounter-balance valve.Drum Lock: External ratchet for locking drumDrum: Single drum, grooved for 16mm dia. wire rope
Steel-welded carbody with axles. Crawler assemblies can behydraulically extended for wide-track operation or retractedfortransportation. Crawler belt tension is maintained by hydraulicjack force on the track-adjusting bearing block.
Crawler drive: Independent hydraulic propel drive is built intoeach crawler side frame. Each drive consists of a hydraulicmotor propelling a driving tumbler through a planetary gear box.Hydraulic motor and gear box are built into the crawler sideframe within the shoe width.