Atlas Copco ALF BMK 91RS Consignes De Sécurité Et D'utilisation page 12

Safety and operating instructions
4. Calibrate the correct air and water
pressure
Use the Atlas Copco no. 9090 0550 80 pressure
gauge to check the water and air pressure when
the rock drill is running.
Air pressure
Ensure that the compressor can deliver the
required air volume at 4–6 bar at the tool.
► High pressure causes rough operation and
damage.
► Low pressure results in a slow drilling speed.
Water pressure
The pressure gauge is equipped with a needle
which is pressed into the hose to measure the
pressure inside.
Note! Make sure that the water pressure is at
least 1 bar lower than the air pressure
otherwise the water can enter the impact
mechanism. For example if the air pressure
is 6 bar, the water pressure must be below
5 bar to prevent water entering the impact
mechanism.
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Attachment device
An attachment device is needed to couple the
pusher leg to the rock drill.
BBD 94 W Rock drill
Attachment is fitted to the intermediate part of the
rock drill.
RH 656 W rock drill
Attachment is fitted to the rock drill by clamping it
on the side bolts.
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No. 9800 0680 71a 2010- 01-01
Orginal instructions