Flowserve CPXV fitted with WW - Manual (Page 25)

CPXV - WW/CW USER INSTRUCTIONS ENGLISH 85392698 10-09
Page 25 of 36 flowserve.com
On aggressive solvent/acid vapor
service a special fluoro-silicone grease (Molykote
FS3451) may be required. Pack the bearing fully
by hand as no grease nipple is used in the design.
g) Fit the self locking thrust bearing nut onto the
shaft and tighten with a C spanner.
h) Fit O-ring on the bearing carrier and lubricate the
bearing carrier bore and O-ring with oil.
i) Ensure the shaft coupling keyway edges are free
of burrs. If optional proprietary labyrinth type
bearing housing seals are used the O-rings
should be oiled to assist assembly.
j) Install the bearing carrier onto the shaft/bearing
assembly and screw the bearing carrier locking
ring into the bearing carrier. Tighten up the
bearing carrier locking ring using a C spanner.
LH thread.
k) Check shaft for free rotation.
l)
Units with an oil lubricated bearing housing may
be fitted with shim-packs between the motor
pedestal and motor pedestal spacer. The shim-
packs are factory set to ensure alignment
between pump and motor shafts and should be
re-fitted in their original positions.
m) To fit an inter bearing shaft sleeve, slide it over
the shaft from the impeller end and tighten up the
sleeve drive screw.
n) To fit the pump end sleeve, slide it over the shaft;
this is driven by the impeller.
6.11.3 Bearing bushes
a) If the pit depth and pump speed are such that an
intermediate bearing is fitted, this is pressed into
the upper support column. The pump end bush
is fitted into the pump end bush carrier [3240.2].
b) When fitting the intermediate bearing bush or
pump end bearing bush these must be pressed in
such that the chamfered end goes in first.
The orientation must be checked such
that locking pegs [6570.9] correctly line up.
6.11.4 Installing the shaft sub-assembly
a) Prior to assembling the shaft sub-assembly into the
soleplate, first fasten on the upper suspension
pipe/bearing bush sub-assembly to the soleplate.
b) If the sump is short there may only be a lower
suspension pipe. In this case, the lower
suspension pipe and the pump end bearing
carrier/bush will need to be fitted to the soleplate
to support the shaft subassembly.
If there is an upper suspension pipe,
the lower suspension pipe and pump end bearing
bush carrier should only be fitted after the shaft
sub-assembly. Install the shaft assembly into the
motor stool and soleplate until the bearing carrier
gap is nominally 4 mm (0.16 in.).
c) Install the bearing carrier hexagon screws and
the hexagon adjustment screws and hexagon
nuts but do not tighten.
d) Press the flinger onto the shaft, where applicable.
This should be set between 0.5 and 2 mm (0.02
and 0.08 in.) from the bearing carrier.
e) Turn the shaft to check for freedom from rubbing.
f) Refit the coupling.
6.11.5 Impeller and casing assembly
a) Install the impeller, impeller key, impeller
lockwasher and nut.
b) Torque up impeller nut.
c) Tighten the impeller nut and peen the lockwasher
onto the nut.
Where an inducer is fitted, this replaces
the impeller nut and lockwasher and is fitted with
Loctite 222.
d) Clean the casing spigot and gasket position
mating surfaces.
e) Fit a new casing gasket.
f) Install the pump casing with a new casing to
discharge gasket.
g) Install casing hexagon screws to the specified
torques.
h) Check freedom to rotate and impeller clearance
within pump casing.
6.11.6 Cartridge seal assembly (if fitted)
a) To set, or reset, a cartridge seal having a PTFE
setting ring-throttle and no separate setting clips,
finger tighten the seal cover stud nuts, then fully
torque up the sleeve screws.
b) Torque up the seal cover stud nuts.