SERV1851 02/08
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Text Reference Boom, Stick, and Bucket Circuits
A
STICK DRIFT REDUCTION VALVE To Stick 1 Control Valve
STICK IN
B
From Stick Cylinder Rod End From Stick Cylinder Rod End
B
A
To Stick 2 Control Valve
To Stick 1 Control Valve Stick In Pilot Pressure
From Stick Cylinder Rod End
Stick Out Line Relief Valve
Shuttle Valve
To Stick 1 Control Valve
Drain B-B
A-A
137
For STICK IN, the shuttle valve is moved down by pilot oil from the joystick. The shuttle valve allows oil in the lock valve spring chamber to flow to the tank. Return oil from the stick cylinder rod end moves the lock check valve to the left against the lock check valve spring. The open lock check valve allows oil flow from the rod end of the stick to return to the stick 1 control valve and the regeneration valve.
