Goulds Pumps 3408 - IOM - Manual (Page 52)

48
3408 IOM 03/99
NOTE: A spare rotating element can be
installed at this point.
5. Remove four cap screws (3-904-9) from each
bearing housing (3-025-3 and -4) and remove the
bearing housings from the shaft (3-007-0).
6. Bend back lockwasher tab and remove locknut
(3-516-4) and lockwasher (3-517-4) from the
outboard end of the shaft and, using a puller, remove
the bearing (3-026-4) from the shaft. Remove the
inboard end bearing (3-026-3) in the same manner.
NOTE: Locknut and lockwasher are not used on
inboard end bearing.
▲
! CAUTION
Do not reuse the ballbearings.
7. Slide both stuffing boxes (3-073-9) off of the shaft,
working deflector rings (3-136-9) off the shaft at the
same time. (See Fig. 42)
8.
Remove lip seals (3-177-9) and O-rings (3-914-1)
from the stuffing boxes.
9. Drive both mechanical seal seats (3-401-0) from
both the stuffing boxes.
10. Remove mechanical seal head (0-400-0) from the
pump shaft sleeve. If the set collar (3-421-9) must
be removed, scribe a line on the shaft sleeve
(3-009-9) flush with the end of the seal (to record
mechanical seal location).
11. Remove two casing rings (3-003-9) from the
impeller (4-002-0) and remove O-rings (3-914-2)
from each casing ring. (See Fig. 43)
NOTE: Each casing ring on 8 x 10-20 and
10 x 12-18 has 2 O-rings. (See Fig. 21B)
12. Loosen set screw (3-902-3) in shaft nuts
(3-015-9) and then remove sleeve nuts using pin
spanner wrench. Remove O-rings (3-914-9) from
counterbore in shaft sleeves.
NOTE: Both shaft nuts have right hand threads.
13. To remove the sleeve, hold the shaft vertically
and tap it on a block of wood. The impeller weight
should force both the impeller (4-002-0) and
sleeve (3-009-9) from the shaft.
NOTE: There is a silicone adhesive/sealant
between the sleeve and the impeller.
14. Remove the other seal, shaft sleeve, sleeve O-ring
and nut as described in steps 11, 12, and 13.
15. Remove the impeller key (3-911-1) from the
shaft (3-007-0).
Fig. 41
Fig. 43
A- VENT PLUG ................. è
B- DRAIN PLUG ..... è
C- DRAIN PLUG .............. è
Fig. 40
Fig. 42