STS M2-D2, Operator'S Manual, Page: 22 / 69

22
M2-D
Description, Care and Maintenance
Diesel Powered Centrifugal Pump
Grease cup instructions (Fig.5a)
GREASE CUP NEEDS TO BE CLEANED REGURALY
The grease cup may not perform its function properly (lubricating the seal) if it is not routinely cleaned of
old hard grease build-up.
If the grease cup is always “topped up” instead of allowed to run to the full stroke of the plunger, the grease
may dry out and build up inside of the cup and not allow the plunge to push to the full stroke. This in turn
will stop the supply of grease to the seal causing premature seal failure.
As a precaution it is strongly recommended that every 30 days, the grease cup (or the top of the grease cup)
be remove and the inside of the cup and the plunger be cleaned of all old grease.
Reassemble the plunger into the cup and check that the plunger sliders to the bottom of the now clean cup.
Fill with fresh grease.
FIG #5a Shows clean grease cup & plunger and old, dried grease taken out of the cup, that was causing the
plunger to “hang-up”.