Break Protection Valves - Case WX145 Operator's Manual

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ATTACHMENTS

BREAK PROTECTION VALVES

The break protection valves prevent the working
attachment from lowering in case of a hydraulic
hose breaking on the head side of the boom cylin-
ders.
The hydraulic connection of boom cylinder head is
cut out, so that hydraulic oil can flow back from this
point only if the "boom lowering" control is activated.
Also the upper and dipper cylinders can be
equipped with pipe break protection valves.
If an hydraulic pipe breaks:
Set hydraulic control lever for "Boom lowering", or
the pedal for "Boom lowering" to idle position.
Alert people nearby with the horn.
The working attachment area with lifted load has to
be ensured so as nobody can stay under the work-
ing attachment or under the load or in proximity of
the hydraulic hose broken.
When the working attachment and the load are low-
ered to the ground, oil comes out from the broken
spot of the pipe.
Place the working equipment and the load carefully
on the ground.
Replace the broken hydraulic hose.
Only after replacement, resume the work.
Escaping hydraulic oil and possible rags have to be
discarded without polluting the environment.
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