Safety and operating instructions
36 © Construction Tools GmbH | 3390 5203 01 | 2019-08-06
Original Instructions
6.6.5 Blank firing of the working tool
The working tool "blank fires" if the percussion energy is
transferred to the retainer bars instead of to the material
to be broken. This happens when the working tool
breaks through the material or slips off it, e.g.: when
working on thin concrete slabs or layers of loose rocks.
Blank firing of the working tool subjects the hydraulic
breaker and the carrier to increased loads. Blank firing of
the working tool generates a typical metallic sound.
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Try to avoid blank firing of the working tool by:
–
observing the material to be broken to identify
whether there is any risk of the working tool break-
ing through the material or slipping off it.
–
listening to the sound of the hydraulic breaker.
You can hear a metallic twang when the working
tool is blank firing.
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Stop the hydraulic breaker when blank firing occurs.
6.6.6 Cylinder end positions
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Avoid operating the hydraulic attachment when the
carrier stick and bucket cylinder is in one of its end
positions.
These end positions have damping facilities; the hy-
draulic cylinder may be damaged by prolonged use
while in its end positions.
n
Reposition the carrier so that you do not have to work
with the cylinder in its end positions.
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