MK Diamond MK-MANTA III - Manual (Page 18)

18
PROBLEM WHAT TO DO? INDICATION CAUSE SOLUTION/
RECOMMENDATIONS
No return of
fluid
Check where fluid
is leaking.
If Leaking can be tolerated, contin-
ue drilling with increased attention.
Bit Stuck
Shear Pin Fail
1. Try to raise bit,
if possible.
2. Stop rotation.
1. Stop rotation.
2. Raise bit.
Loose material
(cut steel or ag-
gregates) is block-
ing between core
and bit or between
borehole and bit.
Step 1: Apply wrench and rotate bit
in both directions while bit is under
tension. If not successful:
Step 2: Try to over drill a hole
slightly larger then the stuck bit.
Drill moved dur-
ing drilling (poor
fastening)
Disconnect bit and remove, break
core. Start over with improved fas-
tening of machine.
Bit deviates, guide
ways on cradle
have too much
clearance.
Disconnect machine, adjust guid-
ance.
No clearance be-
tween tube I.D. or
O.D. and crown I.D.
or O.D.
Replace bit.
Drill impacted
to stall at lower
speeds.
Use recommended speed for the
bit diameter used. Raise bit when
it begins to load down. Feed bit
slowly when chattering begins.
TROUBLESHOOTING
MANTA CORE DRILL III TROUBLESHOOTING