Diamond Products CB700 Drill Motor - Manual (Page 17)

TROUBLESHOOTING
Problem: Bit is jammed while coring.
Possible Cause: Debris is lodged between core and bit.
Solution: Rotate bit in both directions using spanner to release
debris then inspect bit.
Possible Cause: Drill stand is not secured to work surface.
Solution: Reset base and secure properly using vacuum base or
anchor.
Possible Cause: Diamond rims have worn away.
Solution: Replace core bit.
Problem: Coring speed has reduced.
Possible Cause: Bit has encountered rebar.
Solution: Adjust feed pressure to avoid motor overload.
Possible Cause: Diamonds have glazed over.
Solution: Dress diamond rim on bit and check water feed rate.
Possible Cause: Diamond rims have worn away.
Solution: Replace core bit.
Possible Cause: New core bit.
Solution: Core at a slow rate during first 2-3 coring cycles.
Problem: Core bit appears to sway.
Possible Cause: Shaft was been damaged.
Solution: Replace shaft and check bearing arrangement.
Possible Cause: Bit is deformed or damaged.
Solution: Replace core bit.
Possible Cause: Chips are attaching to the bit.
Solution: Inspect core bit and increase water flow rate.
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