Waukesha Cherry-Burrell Maintenance
10/2010 95-03009 Page 43
Pre-assembled (Cartridge)
Seals
Figure 52 - Remove Casing Clamp, Casing
and O-ring
Figure 53 - Removal of Wet End
Figure 54 - Remove Seal Assembly.
A. Shims E. Adapter
B. Cap Screw F. Backplate
C. Cartridge Seal G. Impeller
D. Socket Head Screw
Pre-assembled (Cartridge) seals have all of the seal components
mounted to a flange, and are pre-adjusted at the factory. Follow the seal
manufacturer's (John Crane, A.W. Chesterton, etc.) recommendations
regarding application, operation and maintenance.
NOTE: The cartridge seal comes with a set of
removable lugs/spacers in
place that are used to hold the assembly together until installation is final.
Do not remove these lugs until installation is complete and you are
instructed to do so in step 17 on page 46.
Disassembly of Pre-assembled (Cartridge) Seals
1. Remove all flush connections and fittings.
2. Remove the casing clamp, casing, and o-ring from the housing flange
(Figure 52).
3. Remove the impeller retainer bolt and o-ring; then loosen the seal set
screws (Figur
e 53, item A).
4. Pull the impeller, backplate, and seal off the bear
ing shaft as a unit.
Set the assembly face down (on the impeller).
NOTE: The clea
rance shims that position the impeller within the casing
are at the end of the impeller hub (inside the seal.) Keep the shims
together as a set for reassembly (Figure 54).
5. Remove the cap screws (Figure 54, item B) holding the cartridge seal
to the seal adapter (Figure 54, items C and E).
6. Remove the seal unit from the backplate assembly.
7. Pull the seal from the seal adapter. (Figure 54, items C and E)
8. Remove the seal adapter by removing the socket head cap screws
(Figure 54, item D) holding the adapter to the backplate.
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