FEDCO MSS-40 - Page 44

MSS
TM
Series
© Copyright 2022 Fluid Equipment Development Company | www.fedco-usa.com
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Figure 95 - Starting Stage Installation
4. For:
MSS-15/20/30 Pumps:
Install the rst stage housing (di󰀨user bowl)
onto the inlet ring. Note that the rst stage
housing (di󰀨user) can be identied by the
lack of vanes on the bottom of the bowl.
MSS-50/70 Pumps:
Install the rst di󰀨user bowl onto the inlet
ring.
NOTES: Verify di󰀨user bushings have been
pre-installed before assembly.
Figure 94 - First Stage Spacer Installation
3. Install the rst 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 rst stage spacer is dimension-
ally di󰀨erent 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
di󰀨er 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 eld service
for gauge block height if unknown. The pump
serial number must be provided.
Pump Overhaul Continued