IOM/CPHM/DEC19/01 ISSUE DATE:14-12-2019
Page 19 | 48 REVISION NO.1
casing cover (220) and remove the throat bush (350).
b) Pull out the shaft sleeve under mechanical seal (315). Use the groove on the
shaft sleeve for pulling it out. Be careful while removing shaft sleeve since
sleeve comes out along with rotating unit of the mechanical seal.
c) Remove the mechanical seal from the shaft sleeve and keep it in a clean place.
d) Remove hex. nuts from casing cover (220) studs.
e) Take out the casing cover (220) along with mechanical seal cover taking care
of the mating ring face.
f) Unscrew the nuts of mechanical seal cover studs and remove mechanical seal
cover studs and mechanical seal cover (231) from casing cover (220).
6.1.18 Loosen the grub screw holding the liquid deflector (236) incase of unit 11 and 13
pumps. Take out the liquid deflector (236).
6.1.19 Remove nuts holding lantern bracket (248) and bearing housing (240) for unit 11
and 13. In case of unit 4, 5, 7 and 9 remove nuts holding bearing cover (271) and
bearing housing (240).
6.1.20 Take out lantern bracket (248) for unit 11 and 13. In case of unit 4, 5, 7 and 9
take out bearing cover NDE.
6.1.21 Take out “O” ring (523) for bearing housing carefully.
7.1.22 Remove the pump half coupling (397) carefully, after unscrewing the grub screw.
CAUTION:
Coupling half should be removed with the help of suitable extraction device. To
avoid damage to the bearings, the coupling half should not be knocked off the
shaft.
6.1.23 Take out the coupling key (321).
6.1.24 Loosen the hex. screws for bearing cover (NDE) (271). Remove carefully
the bearing cover (271) and packing (514).
6.1.25 Force the shaft (180) out carefully in the direction of the driving end. Shaft will
come out with bearings and bearing cartridge/bearing housing.
6.1.26 Remove the circlip (485), remove the bearing cartridge (241)/bearing housing with
the help of suitable puller.
6.1.27 Unlock the washer (415) and remove lock nut (336).
6.1.28 Take out the driving end double row angular contact ball bearing (263) with the
help of puller.
CAUTION:
Steps 7.1.28 to 7.1.30 are to be followed only if bearings are damaged and to be
replaced.
6.1.29 Take out outer race of roller bearing at NDE from bearing housing in case of
reinforced bearing arrangement.
6.1.30 Oil seal in the bearing cartridge/bearing housing should be removed if the seal
lips are worn out or spring has lost tension.
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