Operator’s instructions
7. Drilling
71
8. Continue drilling until the coupling sleeve has come half way into the drill steel
support. Move the rotation and feed levers to NEUTRAL position at the same
time.
Checks during drilling
Monitor drilling performance and pay particular attention to the points below:
Should anything out of the ordinary occur, stop drilling and clear up the trouble or
ask service personnel to investigate.
1. Rock drill:
• Abnormal impact hose vibration.
- Check the pressure in the rock drill accumulators.
• Check that the shank adapter is sufficiently lubricated.
- Lubricating oil/air should leak out from the shank adapter. Lubricating oil
pressure should be between 2 and 10 bar on the ECL pressure gauge.
• Abnormal leakage from the rock drill.
• Note that the shank adapter has a “float position”, i.e. it is pressed out about 4-
6 mm from the subframe.
• If damper pressure is lower than 35 bar or higher than 120 bar, percussion will
stop automatically ( For drill rig COP 1800/2150/2550/4050 series )
- Stop drilling immediately and ask service personnel to investigate.
- If the rig is equipped with ECL collection, the ECL collection lamps on the
display should be checked.
2. The borehole:
•If water emerges from the drill hole
- Switch off DCT to protect the filters
Removing the coupling sleeve
1. Make sure the rotation and feed levers are in NEUTRAL position.
Note
Note
If the coupling sleeve is loosened, air will blow out of it.
2. Hold the percussion mechanism lever in PERCUSSION MECHANISM position
for a few seconds until the coupling sleeve has come loose and then move the
lever to NEUTRAL position.
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