Specifications Information and Repair Parts Manual
3100-99
3100-254-00
3
07/2012
DISASSEMBLY OF BEARING HOUSING:
1.
Remove front pump assembly as described
under
TO
REMOVE
CUTWATER
/
WEARPLATE.
2.
Unscrew impeller, right hand thread (Ref. No.
17).
3.
Remove shaft sleeve (Ref. No. 23) with seal
head (Ref. No. 22) on it.
4.
Disassemble bearing housing (Ref. No. 26) from
pump adapter (Ref. No. 32) by removing four
hex head cap screws (Ref. No. 27) and hex
head locknuts (Ref. No. 25).
5.
Remove shaft bearing (Ref. No. 28) and shaft
(Ref. No. 29) as an assembly by first removing
snap ring (Ref. No. 30). Push shaft bearing
assembly out of bearing housing by rapping on
threaded end of shaft with a rawhide mallet, or
block of wood and a hammer.
6.
Ball bearings (Ref. No. 28) can now be removed
from shaft (Ref. No. 29).
ASSEMBLY OF BEARING HOUSING:
1.
If shaft bearings have been removed from shaft,
replace by sliding bearing on shaft to shoulder.
Replace shaft bearing assembly by sliding
assembly into housing threaded end first. Push
shaft bearing assembly completely in by gently
tapping on keyway end of shaft with a rawhide
mallet. Replace snap ring.
2.
Reverse steps 1, 2, 3 and 4 (described above) to
reassemble pump.
NOTE:
After pump is assembled, it is necessary to rotate
pump shaft by hand to check for striking of impeller. If
striking or rubbing occurs, adjust impeller shims as
required (See Shim Adjustment).
SHIM ADJUSTMENT
1.
When installing a replacement impeller, it
may be necessary to vary number of shims
(Ref. No. 21) that will be required. This is
done by adding one shim more than was
removed and reassembling pump as
described.
2.
Be sure that the casing is snugly in place
and check shaft to make sure it is turning
freely. If it turns freely, check to ensure that
adapter (Ref. No. 32) and casing (Ref. No.
7) are fitted metal to metal where they meet
on outside. If they are not metal to metal
tighten cap screws (Ref. No. 31) and
recheck shaft for free turning. Tighten
carefully, turning shaft while tightening. If
shaft seizes before cap screws (Ref. No. 31)
are completely tight, disassembly pump and
remove one shim and repeat reassembly.
3.
If at any time during above operation shaft
does not turn free or a metal to metal strike
can be heard or felt when turning shaft,
follow procedure indicated above and repeat
procedure.
4.
Above procedure ensures that the pump will
have proper running clearance between
impeller and casing and perform like a new
unit with new impeller or motor.