Starting the rock drill
1. Open the main valve for compressed air.
2. Open the cock for the flushing water.
3. Adjust the feed control lever to give a suitable feed force for collaring the hole.
4. Align the rock drill so that the drill steel touches the desired collaring point.
5. Move the throttle lever forward a little, which will start water flushing,
percussion and rotation.
6. Collar the hole with reduced feed force.
7. Move the throttle lever fully forward once the drill steel has gained a secure
footing in the rock.
8. Adjust the feed force using the control lever so that the maximum penetration
rate is obtained.
Note! Do not bend the drill steel as this will increase wear of the shank bushing and
piston. It can also affect drilling efficiency and increase the risk of drill steel
breakage.
Stopping the rock drill
Pull the throttle lever backwards, which will stop percussion, rotation and flushing
water.
Checking the lubrication
The chuck and drill steel shank must allways be covered by a film of oil
Re-positioning the pusher leg
1. Switch off the rock-drill percussion and flushing using the throttle lever.
2. Press the trigger, whereupon the piston rod is pulled back into the pusher-leg
cylinder automatically.
3. Re-position the pusher leg.
4. Release the trigger, whereupon the piston rod will move outwards again.
5. Move the throttle lever forward into the working position.
