COVER AS 1686441 - Caterpillar

Stick Hydraulic System
A stick cylinder is used to move the stick IN and OUT. When the stick cylinder rod EXTENDS, the stick moves IN. When the stick cylinder rod RETRACTS, the stick moves OUT.The main hydraulic pumps supply high-pressure oil to the main control valve. Pilot oil pressure from the pilot manifold is used by the joysticks to control the movement of the stick I control valve and stick II control valve in the main control valve. The stick I and stick II spools, in turn, control the flow of the high-pressure oil to the stick cylinder. The main hydraulic control valve determines the direction and speed of the stick cylinder in proportion to the movement of the joystick.Components of the stick system include:
Stick I control valve and stick II control valve
Stick drift reduction valve
Stick regeneration valve and stick unloading valve
Stick cylinderNote: Refer to the appropriate sections in this manual for more information.