HYDRAULICS – CX210/CX240
6 - 44
CX EXCAVATORS
FEATURES
Free Swing Operation
1) An orifice leak is opened between the A and B ports of the swing motor. This will
provide smoother starts and stops of the swing during hoisting operations.
Note: The controller needs an input signal from the engine controller for free swing.
The free swing operation dampens the oil pressure and flow surges to the swing motor
during starting and stopping. This provides for smoother starts and stops during swing
operations.
When the free swing switch is ON, the controller sends a 24v signal to the free swing
solenoid valve. The valve is shifted and allows oil to free flow, through an orifice, between
both main ports of the swing motor. The valve creates a restricted by-pass of the swing motor
when starting swing operations and a by-pass of the swing motor when stopping. When free
swing is ON, the swing brake is released and does not come on. The free swing solenoid
valve is located behind the cab.
Free Swing Solenoid
Valve
Back of cab
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