ITT Goulds Pumps AF, Installation, Operation And Maintenance Instructions

Page: 53 / 74

AF (6-36) IOM 49
Sealed Impeller
17. 700mm and 36” sizes use an impeller cover (998E)
and O-rings to keep pumpage out of the impeller
cavity. The impeller cover must be removed first to
get to the shaft washer (199). Remove the bolts
(799B) and cover (998E) from the impeller (101).
Remove the cover o-ring (412T). Remove the bolts
(198) and shaft washer (199). To remove the
impeller (101), use a wooden mallet and gently tap it
to break it loose from the shaft (122). Pull the
impeller off the shaft, retain the shaft key (178), and
discard the impeller o-ring (412A). A pipe plug
(358I) located in the center of the cover is used to
test the impeller seal after re-assembly, do not
remove this plug, see Fig. 40.
SEAL / STUFFING BOX COVER
•
Mechanical Seal w/ Optional Adapter
18. Be sure all gland flush tubing is disconnected. The
mechanical seal (383) is removed from the stuffing
cover (184) by removing the seal nuts (353) and
pulling the seal away from the stuffing box cover
(184). It is unnecessary to remove the gland studs
(355) unless they are damaged. If the seal includes
a restrictor bushing (496B) and optional adapter
(108B) remove these now. Remove and discard the
adapter gasket (211). Next remove the stuffing box
cover (184) by removing (2) screws (370C) that
secure the stuffing box cover (184) to the bearing
housing (134C). Remove the stuffing box cover
from the bearing housing. On larger pumps use a
sling or hook and chain to securely support the
weight of the stuffing box cover during removal.
Remove the adjusting bolts (356A) and all four
adjusting lugs (415). Be careful not to scuff or scar
the pump shaft (122) during removal, see. Fig. 41.
Packed Box
19. With a packed box, the gland nuts (353), gland
(107), packing (106) and lantern ring (105) must be
removed before the stuffing box cover (184).
Remove all flush tubing. Remove the impeller
adjusting bolts (365A) and all (4) adjusting lugs
(415). Remove the two bolts (370C) that secure the
stuffing box cover (184) to the bearing housing
(134C) then remove the stuffing box cover. On
larger pumps use a sling or hook and chain to
support the weight of the stuffing box cover during
removal. Be careful not to scuff or scar the pump
shaft (122) or sleeve (126) during removal. Next
remove the stuffing box (220), bolts (799E) and
gasket (351W). Finally remove the set screw (469D)
and key (178D) that secure the shaft sleeve (126) to
the shaft (122). If the sleeve is immovable use a
brass drift to knock it from its seat. Be careful not to
mar or scratch the shaft during the process.
Remove and discard the o-rings (412D), see Fig. 42.
Fig. 40
122
412A
101
198
358I
799B
998E
412T
199
178
Fig. 41
370C
122
383
108B
415
134C
353
496B
211
356A
184
355
Fig. 42
412D
122
220
370C
126
134C
351
799E
105
106
184
356A
469D
178D
107
353
415
6