Flowserve IDP CPXV - Manual (Page 29)

CPXV and CPXRV USER INSTRUCTIONS ENGLISH 71569193 09-14
Page 29 of 48
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b) Remove the lower bearing carrier.
If silicon carbide, carbon or high
graphite iron bearings are fitted extreme care
should be taken to avoid chipping or cracking
these relatively brittle components.
c) Unbolt and remove support column(s) [1350.2].
d) Unscrew the overhanging shaft [2100] section
prior to removing the next section of support
column.
e) Any long length of shaft should be temporarily
supported to avoid bending or damage whilst
removing the muff coupling(s).
6.9.4
Bearings, seals and upper shaft
a) If a seal is fitted in the sole plate, determine its
type and remove the seal cover screws and any
accessible seal to shaft clamp screws as
appropriate. If a rigid coupling option below the
thrust bearing was specified this can be removed
before removing the thrust bearing. The
mechanical seal can then be removed.
b) Remove the bearing housing screws.
c) Drive out the labyrinth disk [4330] from the sole
plate (if fitted).
d) Pull the bearing carrier [3240.1] and upper shaft
assembly out of the sole plate. 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) Unscrew the bearing outer nut [3712] (left hand
thread).
g) Remove the drive side flinger [2540.2] and or
labyrinth seal (if fitted) from the shaft.
h) Slide the bearing carrier off of the bearing(s).
i) Remove the bearing nut.
j) Pull off the bearing(s) [3013].
k) Loosen any remaining seal to shaft clamp screws
and slide the seal(s) and seal covers off the shaft.
Any bearings or sleeves can then be pressed out/
off, as required, after first removing any retaining
screws.
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, seal housing and impeller
Inspect for excessive wear, pitting, corrosion, erosion
or damage and any sealing surface irregularities.
Replace as necessary.
6.10.2 Shaft and sleeve (if fitted)
Obtain and fit a new shaft [2100] or sleeve [2400.1] 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] are not re-
used after any removal from the shaft.
The plain bearings may be re-used if both the bearing
bush [3300.2] and bearing sleeve [3400] show no
sign of wear, grooving or corrosion attack. It is
recommended that both the bush and sleeve are
replaced at the same time.
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
sole plate, go to section 6.11.2, Thrust bearing carrier
and shaft sub-assembly.)
Where a mechanical seal is used, extreme cleanliness
is required during assembly. In many instances a pre-
assembled cartridge seal will be used. Where this is not
the case the sealing faces must be checked to be free
from scratches or other damage.
a)
Use olive oil for fitting elastomers.
b) Where an anti-rotation pin is fitted ensure that
correct engagement with the slot is achieved.
c) Carefully press stationary mechanical seal seat(s)
into their housing such that these are not deformed
or damaged.
Work to the specific manufacturer’s
instructions for the mechanical seal.
Where a packed stuffing box [4110] is fitted, pack the
stuffing box cover before fitting on to the shaft, as
follows:
a)
Position each ring [4130] into the box individually,
evenly and firmly.
b) Check that the shaft sleeve [2400.2] freely
rotates after fitting the first ring.
c) Stagger the 45 degree scarf joints by 90 degrees
from each other in the box.
d) Insert the inner two packing rings.