Revision 6
An airlock can be eliminated by refilling the lubricator reservoir and sight glass, loosening
the outlet union at the pump outlet, and manually operating the pump with the priming stem
until no air bubbles appear at the pump outlet. The airlock may reoccur if the cause is not
found and eliminated.
Over Fill:
Over filling is caused by the oil absorbing the air in the sight glass as it passes through the
pump.
This condition does not affect the operation
of
the pump except that the oil cannot be
observed coming out
of
the dropper due to the sight glass being filled with oil.
Normal sight glass operation can be restored by momentarily loosing the dropper at the top
of the sight glass to break the vacuum within the sight glass. Do not leave the sight glass
dropper open for very long as this will allow all the oil in the sight glass to drain out and
possibly cause an air lock condition.
© Copyright October,
2001
NLB Corporation
8-71
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