Flowserve CPXVC - Manual (Page 22)

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11
Page 22 of 32 flowserve.com
g) Remove all flushing lines as appropriate, casing
screws and discharge flange bolts.
h) Remove pump casing [1100].
i)
Remove pump casing [4590.1] and discharge
flange [4590.3] gaskets and discard.
(Replacement gaskets will be required for
assembly.)
j) Clean the gasket mating surfaces.
6.9.2
Impeller removal
NEVER APPLY HEAT TO REMOVE THE
IMPELLER. TRAPPED WORKING LIQUID OR
LUBRICANT MAY CAUSE AN EXPLOSION.
6.9.2.1 Impeller removal with threaded on
impeller
a) Fit a chain wrench or bolt a bar to the holes in the
coupling half, or fit a keyed shaft wrench directly to
the shaft.
b) Using gloved hands, raise the wrench above the
workbench by turning the impeller [2200]
clockwise as viewed from the impeller end of the
shaft.
c) Give the impeller a quick turn counter-clockwise to
strike the wrench handle against the workbench or
a wooden block. This will free the impeller from the
shaft.
d) The loosened impeller has an gasket [4610.2] that
should be discarded. Use a new O-ring for
assembly.
6.9.3
Cover and Support column
a) Remove the nut [6580.1] which fixes the cover
[1220] to the support column [1350].
b) Remove the lower cover.
c) Unbolt and remove support column [1350].
6.9.4
Bearings, seals and shaft
a) Remove flingers [2540], wetted ones by their
screw [6570]. If a seal is fitted in the soleplate,
determine its type and remove the whole bearing
housing, shaft and seal stool assembly complete
ensuring sufficient support due to the weight of
this large sub-assembly. To achieve this unscrew
the seal stool to soleplate screws and any
accessible seal to shaft clamp screws as
appropriate. The seal stool can then be removed
by unscrewing it from the bearing housing
followed by the mechanical seal.
b) Remove the bearing housing screws.
c) Drive out the labyrinth disk [4330] from the
soleplate (if fitted).
d) Remove screws [6570.6] and pull the bearing
carrier [3240] and upper shaft assembly out of the
soleplate. Take care to support the long shaft to
avoid bending or damage to it and any attached
components.
e) Pull off the coupling [7000] and remove the
coupling key [6700.1].
f) Remove thrust bearing circlip [6544](or bearing
carrier locking ring if paired angular contact
bearings are fitted.
Bearing carrier locking rings are left-
hand thread.
g) Slide the bearing carrier off of the bearing(s).
h) Remove the bearing nut [3712].
i)
Pull off the bearing(s) [3013] and [3011].
6.10 Examination of parts
Used parts must be inspected before
assembly to ensure the pump will subsequently run
properly. In particular, fault diagnosis is essential to
enhance pump and plant reliability.
6.10.1 Casing, cover and impeller
Inspect for excessive wear, pitting, corrosion, erosion
or damage and any sealing surface irregularities.
Replace as necessary.
6.10.2 Shaft
Obtain and fit a new shaft [2100] if grooved, pitted or
worn.
6.10.3 Gaskets and O-rings
After dismantling, discard and replace.
6.10.4 Bearings
It is recommended that bearings [3013] and {3011] are
not re-used after any removal from the shaft.
6.11 Assembly
To assemble the pump consult the sectional
drawings. See section 8, Parts lists and drawings.
Ensure threads, gasket and O-ring mating faces are
clean. Apply thread sealant to non-face sealing pipe
thread fittings.
6.11.1 Mechanical seal or gland packing seal
(If there is no mechanical seal or gland packing at the
soleplate, go to section 6.11.2, Bearing housing sub-
assembly.)