38
RotoClone
®
W
© 2015 American Air Filter Company, Inc. Any use of the text or images
this document contains, without permission of American Air Filter
Company, Inc., is prohibited. RotoClone, AAF, REDClean, REDFiltration,
and Reliable Efficient Durable are registered trademarks of American Air
Filter Company, Inc. d/b/a AAF International.
8.
Replace any bearings, if removed, in original position and check
impeller clearance per Figure 7 before tightening bearings onto shaft.
Figure 6. Construction details of the RotoClone W shaft Assembly
11.10
Replacement of Shaft, Impeller or Water Cone
Removal of the shaft, impeller, or water cone requires access to the front of
the scroll. This is most easily accomplished by removing the inlet piece and scroll
inlet cone. The water piping should be disconnected before removing the inlet
sections. The water cone should be marked to indicate the bolt hole locations in
relation to the scroll, before removal. The old water cone can be used to match
mark the replacement water cone, which comes undrilled. Note the distance from
the back of the impeller to the scroll before removing the impeller. The impeller is
fastened to the shaft by a taper lock hub.
It is easiest to remove the impeller from the shaft by using a wheel puller,
after unbolting the hub; or one can reinsert the hub screws into the unused holes
in the hub to “push” the shaft off of the hub. However, on units that have been in
service for years, this method may not provide the necessary force to “break” the
hub away from the shaft, and the wheel puller will be necessary. Finally, the
bearings and driven sheave are taken off and the shaft can be removed.
Reinstallation is the reverse of removal. The shaft is replaced and the
bearings and driven sheave tightened back onto it. New set screws should be
used, when single piece bearings are supplied, as the old ones will most likely
have blunted ends that can no longer adequately secure the collar to the shaft. Be
