Flowserve Durco Mark 3, Инструкция по установке, эксплуатации и обслуживанию

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DURCO MARK 3 ISO FRAME MOUNTED ENGLISH 85392719 06-12
Page 32 of 52 flowserve.com
6.9.3 Gaskets, O-rings and V-ring when fitted
After dismantling, discard and replace.
6.9.4
Bearings
It is recommended that bearings are not re-used after
any removal from the shaft.
6.9.5
Bearing labyrinths/isolators
Labyrinth seals and bearing isolators should be
inspected for damage but are normally non-wearing
parts and can be re-used.
The lubricant, bearings and bearing housing seals
are to be inspected for contamination and damage. If
oil bath lubrication is utilized, these provide useful
information on operating conditions within the bearing
housing. If bearing damage is not due to normal
wear and the lubricant contains adverse
contaminants, the cause should be corrected before
the pump is returned to service.
Bearing seals are not totally leak free devices. Oil from
these may cause staining adjacent to the bearings.
6.9.6
Bearing housing and carrier
Inspect the bearing carrier circlip groove. Ensure it is
free from damage and that housing lubrication
passages are clear. Replace grease nipples or the
filter breather (where fitted) if damaged or clogged.
On oil lubricated versions, the oil level sight glass
should be replaced if oil stained.
6.10 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.
6.10.1 Bearing housing and rotating element
assembly
a) Clean the inside of the bearing housing [3200],
bearing carrier [3240] and bores for bearings.
b) Attach bearing housing support foot [3134].
c) Fit the thrust ball bearing [3013] on to shaft [2100].
The double row thrust bearing must not
have a filling slot, as such bearings are limited to
taking thrust in only one direction. If the pair of
angular contact thrust bearings are to be fitted,
these must be mounted back-to-back, as shown
below:
Grease
retainer
[3864]
Grease retainer (clearance type) is only
fitted on grease lubricated units
The following methods are recommended for
fitting the bearings onto the shaft:
Method 1: Use a hotplate, hot bath, oven or
induction heater to heat the bearing race so it can
easily be placed in position then allowed to shrink
and grip the shaft. It is important that the
temperature is not raised above 100 ºC (212 ºF).
Method 2: Press the bearing onto the shaft
using equipment that can provide a steady, even
load to the inner race. Take care to avoid
damaging the bearing and shaft.
d) With bearings at ambient temperature, screw on
the self-locking bearing locknut [3712.1] (with its
polyamide insert facing away from the bearing)
until tight.
e) With the double row thrust bearing place the
bearing circlip [6544] over the shaft, with the
tapered face facing the impeller end.
f) With the heavy duty thrust bearing option, the
lock nut [3712.2], [3864] grease retainer and
[3712.2] if grease lubricated, should be placed on
the shaft with the larger diameter end facing the
impeller end.
g) Fit pump radial ball bearing [3011] onto the shaft
using Method 1 or 2 above.
h) With the NUP roller bearing option, the loose ring
should be against the shaft shoulder.
i) Fit O-ring [4610.2] on the bearing carrier. Lightly
lubricate the bearing carrier bore and O-ring.
j) Ensure the shaft keyway edges are free of burrs.
During installation, use shimming or tape over the
keyway to avoid damaging the drive side bearing
seals.
k) On grease lubricated pumps, ¾ fill the space
between bearing races with the appropriate
grease.
l) Slide the bearing carrier [3240] onto the shaft/
bearing assembly and insert inner circlip [6544]
into the carrier groove or screw up the bearing
locking ring.
m) Check shaft [2100] for free rotation.
n) Fit the labyrinth ring [4330] into the bearing
housing [3200] ensuring the drain hole faces the
bearing and is at the 6 o'clock position.