Ampco Pumps Company LF 401, Instruction & Maintenance Manual

Page: 32 / 36

32
5. Replace the cover, cover gasket and cover nuts. Once the cover nuts are tight-
ened turn the stub shaft by hand a few revolutions making sure nothing is rubbing
inside the pump. Running the pump with foreign objects in the pump or having
the impeller making contact with either the cover or the casing will result in seri-
ous damage if not completely destroying the pump. If the shaft turns freely and
the impeller is not rubbing either the casing or the cover replace the shaft guard
and the pump is ready to be reconnected to the piping system.
Note: Always turn the stub shaft by hand before start up making sure noth-
ing is rubbing inside the motor, such as foreign objects or the impeller touch-
ing either the back inside of the casing or the cover. Also never run this
pump dry. Seals will heat up instantly at operating RPMs, score and may no
longer seal when damaged.
WARNING: Mechanical seal must never run dry. Seal damage will result
.
LF & LM SERIES PUMPS
Figure 39
Figure 42