Operator’s instructions
7. Drilling
75
6. Unscrew the rod and put it to one side.
7. Lower the rock drill by holding the rapid feed lever in the DOWN position and
then thread the shank adapter into the coupling sleeve that is fastened in the drill
steel support by holding the rotation lever in DRILL ROTATION position.
Continue from step 1 until the drill string has been extracted.
Unthreading and extracting with RHS
Knock loose the joints before extraction.
1. Open both drill steel supports with their respective push buttons.
2. Set the switch for dust collector and flushing air in FLUSHING AIR ON position.
If air blows out from the coupling sleeve then the thread has loosened.
3. Rapid feed up until the sleeve has reached the upper drill steel support by holding
the lever for rapid feed in UP position.
4. Set the lever for rapid feed in NEUTRAL position and close both drill steel sup-
ports with their respective push buttons.
5. Hold the top contact on the control lever for rod handling pressed in so that the
grippers open, and then move the lever backwards so that the gripper arm reaches
drill centre. Grip the drill steel firmly with the rod grippers.
If a steel is already in the grippers then the carousel must first be rotated clockwise
to the next empty position.
6. Tighten the joint between the shank adapter and the upper rod slightly by holding
the rotation lever in DRILL ROTATION position for a few brief intervals.
7. Move the rod handling lever to neutral position. The rod grippers then adopt guide
position with a lower gripping force that allows the drill steel to rotate in the grip-
pers.
8. Unscrew the drill steel fully from the sleeve in the drill steel support by holding
the rotation lever in BACKWARD ROTATION position.
9. Rapid feed backwards until the rock drill stops at the correct height for the drill
steel to be moved into the carousel from drill centre by holding the lever for rapid
feed in UP position.
10. Reactivate hard grip on the rod grippers by moving the rod handling lever back-
wards.
11. If drill steel with loose sleeves is used and the rig is equipped with sleeve retainer
(optional equipment), it must be closed now.
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