MSS
TM
Series
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54
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Figure 122 - Series Shell Installation
19. For:
Single Shell Pumps:
Skip this step.
Two Shell Pumps:
Install the series spacer and carefully lower
the series shell over the stages using safe
lifting and handling methods. Align the shell
flange with the inlet flange (serial number
stamping opposite to inlet). Install the shell
flange bolts/ lock washers and torque to val
-
ue specified in the
Fastener Torque Specifi
-
cations
section of this manual.
NOTES:
Make sure there is no gap between
flanges after tightening bolts.
Figure 121 -
Stage Assembly
18. For:
Single Shell Pumps:
Continue to assemble pump stages as de
-
scribed in previous steps until all end shell
stages have been assembled.
Two Shell Pumps:
Continue to assemble pump stages as
described in previous steps until all series
shell stages have been assembled.
NOTES:
Verify diffuser bushings have been
pre-installed before assembly.
NOTES:
The last end shell stage component
will be a diffuser assembly without an impeller.
Figure 120 -
Diffuser Installation
16. Remove the two (2) spacer washers from
between the diffuser assembly and the inlet
ring. This will allow the diffuser to drop to
the inlet and provide the proper impeller
clearance.
17.
Install the second stage diffuser assembly
and place the two (2) spacer washers ap
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proximately 2.8mm (0.11”) thick between
the diffuser assemblies.
Pump O
verhaul Continued
