6.4.5 Place the sleeves (310) onto the shaft DE and NDE and using the DE sleeve lock
nut (334) tight the DE sleeves against the impeller hub. After fixing the DE sleeve locate
the NDE sleeve with sleeve nut (334). Slide the casing rings (190) onto the impellers.
6.4.6 Place the mechanical seal’s backing cover & its rotary assembly on shaft. Then
place the mechanical seal cover (231), liquid deflector (236), and bearing cover (270) on
shaft. Refer the cross-sectional drawing
6.4.7 Heat the bearing (260 & 263) to approximately 100 deg. C. (212 deg. F) using
bearing oil bath.
6.4.8 Slide the heated bearing onto the shaft to about shoulder ring (199) non driving
end. Place the locking washer onto the shaft and screw the bearing lock nut (336) using
spanner. Lock up tightly against the bearing. Bend the washer in slot of bearing lock nut.
6.4.9 Cool the bearing to room temperature and coat both the slides with 200 grams of
recommended grease.
6.4.10 Place the bearing cartridge over the bearings and tighten up with the pump
casing. .
6.4.11 Tighten the bearing cover (271) with bearing cartridge.
6.4.12 Apply same procedure to the DE end side.
6.4.13 Lift the rotating unit by means of crane. Place it in lower half casing such that DE
insert takes guide on lower half casing, casing rings should takes guide in groove
provided in lower half casing.
6.4.14 Check whether both Impellers are centrally placed in volute. If it did not, adjust
NDE sleeve.
6.4.15 Place the cylindrical pins (used to locate the wear ring) in their respective holes.
Install casing gasket (519) with a light coat grease on both gasket surfaces.
6.4.16 Insert the locating pin (611) and drive them home.
6.4.17 as per above TABLE (A) mark the distance & tight the mechanical seal’s backing
cover with grub screw. Tight the mechanical seal cover (231) to lower & upper half
casing with studs & nuts. Refer the cross-sectional drawing.
6.4.18 Lower the casing half upper (122) onto place and engage casing joint nuts
loosely.
NOTE- WHEN INSTALLING CASING HALF UPPER MAKES SURE THAT THE “O” RINGS ARE NOT CUT OR
PUNCHED AND THE GASKET IS HARD AGAINST THE “O” RINGS.
6.4.19 Tighten the bearing cartridge with both upper and lowers half casing.
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