Swing - No Swing Operation (50% Swing
Brake)
The swing mechanical brake is maintained at 50% when
the engine is running.
When the engine is running and the swing pressure
switch is OFF (operations other than swing operation)
the swing brake solenoid valve is energised via the
switch panel. The pressure reducing valve is in the
reducing state.
The 40 bar pilot pressure entering the reducing valve is
reduced and flows through port A3 of the multiple valve
to the swing motor mechanical brake release port P. The
swing brake is maintained at 50%.
The pressure flowing to the release port is 12 bar .
3 - 12
Section E Hydraulics
9803/6020
Section E
3 - 12
Issue 1
Schematics
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