Fault-finding schedule
Fault
Reduced suction effect
Drive ejector does not
start
Dust in exhaust air
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Cause
Clogged filter.
Damp cuttings have blocked the
suction hose.
Freezing in drive ejector.
Filters too wet.
Dirt in drive ejector. (Shine a
torch through the drive ejector to
check for dirt.)
The compressed-air hose is not
connected to the dust collector.
Freezing in dust-collector air sys-
tem.
Filter damaged.
Filters not correctly attached.
Remedial action
Clean the filters
Clean out the suction hose by starting the
drive ejector and then striking the hose
carefully.
Pour approx. 1 dl of carburettor spirits into
the inlet hose of the drive ejector.
Check that the water separator is working
properly.
Take no action. The suction effect will im-
prove gradually during operation, provided
that no more moisture or water is sucked
into the filters during drilling.
See "Drilling in water-bearing rock".
Remove the ejector from the filter unit.
Carefully clean out the dirt.
Take care not to damage or deform the noz-
zle.
Connect-up the compressed-air hose.
Warm-up the parts carefully.
Replace damaged filters.
Fit and fasten correctly.
English
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