Carver Pump RSA - Page 36

RS – Multi-Stage, I-280
Centrifugal Pump 280 – 16.03.EN
30
and wear ring (7X) intact. Remove casing O-ring
from interstage casing and discard O-ring.
15. Remove impeller key (32A). Remove interstage
sleeve (58). Remove interstage shims (73G), as
necessary, from both sides of interstage sleeve.
Record the location of all removed shims for
ease of assembly.
16. Repeat steps 14 and 15 for each stage of the
pump. Number and match mark all parts during
removal.
17. Remove the spacer sleeve (14D).
NOTE
Before removing wear rings from casings
inspect per Section XI, Paragraph D, step 9.
Wear rings should only be removed for
replacement, refer to Section XI, Paragraph G
for wear ring replacement.
18. If replacement is required, remove wear ring
(7X) and diffuser (5X). First wear ring (7A) will
remain in the suction case (9) unless
replacement is required.
19. Remove casing O-ring (89D) from suction case
(9) and discard casing O-ring.
NOTE
Shaft (6), mechanical seal (90), seal gland
(17A), bearing cap bearing isolator (168*),
bearing frame bearing isolator (169*), and
inboard bearing cap (37) will come off together
with the bearing frame (99) as an assembly.
20. Remove bolts (600) from bearing frame (99).
Remove bearing frame assembly from suction
case (9).
21. Remove bolts (601), washer (850), O-ring
(89W), and remove inboard bearing cap (37).
Remove bearing cap bearing isolator (168*)
from inboard bearing cap and discard bearing
cap bearing isolator.
22. Remove bearing jam nuts (22) from shaft (6).
23. Remove back-to-back ball bearings (16) with
bearing frame (99) from shaft (6).
24. Remove bearing spacer (78) with slinger (40)
intact, from shaft (6). Remove bearing frame
bearing isolator (169*) from bearing frame (99)
and discard bearing frame bearing isolator.
25. Remove snap ring (176).
NOTE
Refer to mechanical seal vendor instructions for
proper mechanical seal removal procedure.
DO NOT remove rotating element of
mechanical seal (90) from shaft sleeve (14A) at
this point, especially if mechanical seal is
relatively clean and in good working condition.
26. For Type 1 mechanical seals (90*), remove
gland (17A) from shaft (6).
27. Remove sleeve (14A) and rotating element of
mechanical seal (90*) from shaft (6). Inspect
rotating element of mechanical seal. If
replacement is required, remove element from
sleeve.
28. Remove O-ring (89X).
29. If necessary to replace mechanical seal (90*),
remove stationary element of mechanical seal in
seal gland (17A). Remove gland O-ring (89H)
from seal gland and discard O-ring.
30. For cartridge mechanical seals (90*), loosen
setscrews holding the cartridge seal sleeve to
shaft (6). Remove cartridge seal from shaft.
31. Remove key (32X) from shaft (6).
NOTE
DO NOT remove seal collar (68), unless sleeve
(14A) needs replaced.
32. Remove setscrews (665) from seal collar (68).
Remove seal collar from sleeve (14A).