4
HS SERIES MULTISTAGE PUMP ASSEMBLY
7. Fit the last stage body. This is the one with the exit slots in it and continue to build
with the next impeller and wear ring. There are no clearances or spacers to worry
about as the impeller has the spacer inbuilt to minimise
the number of components in the pump.
8. Fit the stage body and the next impeller and wear ring. One more stage body and
another impeller in the case of a four-stage pump or a spacer in place of the impel-
ler if it is a three-stage pump. The impeller spacer or the impeller should be sitting
slightly proud of the shaft steam to enable you to tighten the nut and washer and
lock the impellers in position.
9. Tighten nut to required torque setting.
10. Locate the first stage body with the word “top” adjacent to the outlet port of the
pump. Note: It is important that this stage body is assembled correctly to aid in the
priming of the pump.
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