Case WX145 Operator's Manual page 144

Upper structure holding brake faults
- All 3 switching states continue to be available; in
the "automatic" or "applied" states, the respective
lamp flashes ("in automatic", right lamp; "applied"
left lamp).
- Only the "released" and the "applied" states are
available; while with "applied" state the left lamp
flashes.
Upper structure holding brake, emergency acti-
vation
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WARNING
The upper structure slewing is free as soon as the
upper structure emergency brake is released with
the emergency activation!
In such case, the upper structure is not able to stop
automatically after the end of the slewing move-
ment.
When working on slopes or in an inclined position
of the excavator, the upper structure can continue
to slew uncontrolled if the slewing movement is not
stopped by countering.
To avoid dangerous situations, the emergency
release function should be used only in exceptional
cases.
Rectify any faults of the upper structure holding
brake immediately (or have them repaired).
The pilot pressure needed for releasing the upper
structure holding brake is controlled by means of a
solenoid valve.
In the event of solenoid failure, the upper structure
holding brake can be released with the emergency
release device.
The solenoid valve is installed in the frame behind
the cab (1).
Remove the base-plate of the maintenance opening
below the valve stack.
Screw the setscrew (3) down to the limit stop using
an Allen key (2). The upper structure holding brake
is released and the upper structure can turn freely.
After removal of the fault, screw the setscrew back
out to the upper stop.
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OPERATING THE MACHINE
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