Goulds Pumps XHD - IOM - Manual (Page 75)

Maintenance
3. Remove the seal ring inner diameter o-rings (512A) and outer diameter o-rings (512B). The
indicating roll pin (757A) can also be removed if necessary.
Impeller removal
Two people should work together to remove the impeller for safety purposes.
1. Remove the gland assembly halves (107) by removing the gland adjusting bolts (353).
2. Loosen the bearing frame adjustment plate bolts (352G) and nuts (427D) but DO NOT
remove hardware or adjustment plates (234F). Keep hardware finger-tight to keep the
bearing frame constrained to the pedestal while allowing it to slide along the pedestal rails.
3. Slide the bearing housing and shaft assembly forward towards the suction side of the pump
to allow better access to the impeller (101).
4. Remove the two-piece knock-off ring (149).
5. Support the impeller (101) using a Goulds-provided impeller hook attached to the hoist. An
overhead hoist chain or sling can also be routed through a vane passage to support the
impeller.
6. With one person holding the impeller (101) in place, the other person rotates the shaft (122)
counterclockwise to unscrew the impeller. This step should take 4 âM M 5 complete shaft
turns.
7. Guide the impeller (101) completely free of the shaft threads and casing volute liner (561).
XHD Installation, Operation, and Maintenance Manual 73