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.
◆
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 breaking 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.
◆
Stop the hydraulic breaker when blank firing
occurs.
Cylinder end positions
◆
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 hydraulic cylinder may be damaged by
prolonged use while in its end positions.
◆
Reposition the carrier so that you do not have
to work with the cylinder in its end positions.
HB 2000, 2000 DP, 2500, 2500 DP Safety and operating instructions
© Construction Tools GmbH | 3390 5090 01 | 2016-05-23
Original instructions
37
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