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.
© 2012 Atlas Copco Construction Tools GmbH | No. 3390 5096 01 | 2012-04-26
Original instructions
34
HB 3100, 3100 DP, 3600, 3600 DP, 4100, 4100 DP,
4700, 4700 DP
OPERATION
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