MSS
TM
Series
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Figure 95 - Starting Stage Installation
4. For:
MSS-15/20/30 Pumps:
Install the first stage housing (diffuser bowl)
onto the inlet ring. Note that the first stage
housing (diffuser) can be identified by the
lack of vanes on the bottom of the bowl.
MSS-50/70 Pumps:
Install the first diffuser bowl onto the inlet
ring.
NOTES:
Verify diffuser bushings have been
pre-installed before assembly.
Figure 94 - First Stage Spacer Installation
3.
Install the first stage (start) spacer onto the
pump shaft until it comes into contact with
the shaft collar sleeve.
NOTES:
The start spacer must contact the col-
lar sleeve as shown. If the collar sleeve’s cup
side if facing up, it is on upside down.
NOTES:
The first stage spacer is dimension
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ally different from the stage spacers. On some
installations, this start spacer may be engraved
to help distinguish it from standard stock spac-
ers.
NOTES:
MSS-50/70 stage components may
differ in size/ shape.
Figure 93 - Shaft Installation
e. Slowly lower the pump shaft into the inlet
until the pump shaft end rests on the gage
block.
2.
Lubricate and install the inlet
O-ring.
NOTES:
Gauge block height should be preset
from the stage removal section. Verify height
before building. Contact FEDCO field service
for gauge block height if unknown. The pump
serial number must be provided.
Pump Overhaul Continued
