Operator’s instructions
7. Drilling
70
7. Drilling
Start of drilling
1. Set the switch for percussion pressure to REDUCED PERCUSSION PRESSURE/
DRILL FEED PRESSURE position.
2. Set the switch for dust collector and flushing air to DUST COLLECTOR ON/
FLUSHING AIR ON position.
Note
Switch off the dust collector immediately if water flushes up from the hole. Water
and dust can clog the hoses and filters.
3. Set the lever for rotation in DRILL ROTATION position.
4. Set the percussion mechanism lever in PERCUSSION MECHANISM position.
5. Set the lever for feed in DRILL FEED position.
Note
Apply DRILL FEED carefully until the drill bit has entered solid rock.
Note
Collaring with constant feed can make the drill bit veer off in the wrong direction,
resulting in hole deflection and extra strain on the drill string.
6. Automatic percussion pressure can be activated after reaching homogenous rock.
Set the switch for percussion pressure to AUTOMATIC REGULATION OF PER-
CUSSION PRESSURE position.
7. When the coupling sleeve approaches the drill steel support, move the drill steel
support lever to OPEN position.
WARNING
•Danger of moving and rotating parts
•Can cause serious personal injury
•Ensure that unauthorised personnel are
outside of the working area
•Stay away from the rotating drill rod
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