IOM/CPHM/DEC19/01 ISSUE DATE:14-12-2019
Page 18 | 48 REVISION NO.1
6.1.4 Remove all auxiliary tubing and piping.
6.1.5 Drain the lubricating oil from bearing housing (240) and remove oil level indicator
(443) (in case of oil lubrication).
6.1.6 We recommend to match the punch mark of coupling halves.
6.1.7 In case of pump with spacer type flexible couplings, disconnect coupling (pump half
and motor half) from the coupling spacer (399) and remove coupling spacer.
Coupling spacer shall fall down. In case of ordinary flexible couplings, remove the
motor from the base.
6.1.8 Remove the support foot hold down bolts.
6.1.9 Adjust string or chain tension to support the weight of the back-pullout assembly for
higher size pump.
6.1.10 Remove hexagonal nuts from the casing studs holding the lantern bracket (248) to
pump casing (105) for unit 11 and unit 13. In case of unit 5, 7 & 9 remove
hexagonal nuts from studs holding bearing housing (240) to pump casing (105).
6.1.11 Screw the release bolts provided in the casing over. Turn the bolts evenly through a
quarter turn at both sides.
6.1.12 Slightly pullout the driving unit till impeller (151/153) clears the pump casing (105).
6.1.13 Place this rotating unit on a table or clear place for further dismantling.
6.1.14 Remove casing gasket (511).
6.1.15 Unscrew the impeller (151/153). Remove the gasket between impeller and shaft
sleeve (515) after taking out the impeller from pump shaft (180).
6.1.16 Removal of stuffing box with gland packing:
For this, following steps should be taken:
a) Remove the split gland (229) by taking out bolts used for clamping of the split
portions.
b) Take out the casing cover (220) along with throat bush (350), gland packing
(430) and lantern ring
(227).
c) Unscrew the hex. socketed cap screw clamping throat bush (350) to the
casing cover (220) and remove the throat bush (350).
d) Remove the gland packing rings (430) and lantern ring (227).
e) Remove the shaft sleeve (311).
f) Remove the liquid deflector (236).
6.1.17 Removal of stuffing box with mechanical seal.
(NOTE THAT MECHANICAL SEALED CPHM PUMPS ARE SUPPLIED UNDER SPECIFIC
ORDER ONLY).
Follow the steps given below:
a) Unscrew the hex. socketed cap screw clamping throat bush (350) to the
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