Case WX145 Operator's Manual page 143

SECTION 3
With ignition key is off, with engine shut off or in the
event of system voltage failure, the upper structure
holding brake is active.
The upper structure holding brake can be operated
in the following three modes:
- lamps off, button (1) not pressed: the brake is
released and the upper structure can rotate freely;
- left lamp off and right lamp on, by pressing button
(1) once only: automatic operation. The holding
brake is automatically applied when the upper
structure comes to an halt. The brake releases
when a slewing movement is initiated. Lamp (3)
lights up if the upper structure is not moved for
more than three seconds;
- left lamp on and right lamp off, by pressing button
(1) twice: the brake is engaged and the upper
structure is stopped.
Automatic operation
The holding brake is automatically applied when the
upper structure comes to an halt. It releases when a
slewing movement is initiated.
If the upper structure holding brake is set to
"Applied", during a slewing movement, left lamp
lights up.
For safety reasons, the brake is applied, however,
only after the slewing movement has ended.
Technical problems can lead to a change of the
functions of button (1).
The following switching states of the upper structure
holding brake that are active when the ignition is
switched off, are active again when the ignition is
switched on.
Ignition OFF
Brake released
Automatic
Applied
Releasing the upper structure holding brake
Depress repeatedly button (1), until lamps on push-
buttons turn off. The holding brake is released and
the upper structure is free to turn (not possible when
pilot control is off).
In the automatic mode (with right lamp lit up), the
holding brake is released when the slewing control
lever is moved out of neutral position.
3-32
Ignition ON
Automatic
Automatic
Applied
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