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Operator's instructions
7. Drilling
Changing drill bit
Moving parts
Risk of personal injury, clothing can be
trapped
Stop rock drill rotation when changing
bits
NOTE: Never start percussion with the drill bit free without any resistance
1. Operate the feeder until the spike is approx. 10 cm from the rock.
2. Make sure that the rotation lever is in neutral
3. Move the drill bit forward until it is pressed against the rock.
4. Turn the right-hand multifunction lever (5) to the right to activate break loose.
5. Switch off percussion pressure when the drill bit has loosened. If the percussion pressure
is engaged for too long then the drill steel can detach from the shank adapter.
6. Unscrew the old drill bit by hand and replace with a new one.
Action in case of drilling problems
Drilling problems
If the following trouble occurs during drilling:
• Hot coupling sleeves (loose coupling sleeves)
• Difficulties in uncoupling the coupling sleeves
• Hole deflections
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