Flowserve WDX - Manual (Page 30)

WDX USER INSTRUCTIONS ENGLISH 71576322 06-05
Page 30 of 46
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c) Clean and flush out the housing with a light
mineral oil.
d) Do not use waste oil to clean the housing.
To clean the bearings:
a) Wipe off as much grease as possible with a clean
lint-free cloth.
b) Brush bearings with hot kerosene (80 to 90 °C/
175 to 195 °F) while gently spinning the outer
bearing ring.
c) Spin each ball to ensure that it is clean.
To remove badly oxidized grease which refuses to
come off:
Dry and reflush the bearing with clean light oil.
It is important not to under or over grease the
bearings as this will lead to over heating and
premature failure. It is recommended that the
bearings be filled with grease using a suitable
spatula. In addition the housings should be no more
than half filled.
6.2.4 Mechanical seals
The current maintenance is limited to seal control. It
is necessary to detect any small leakage which
announces the beginning of the deterioration of
friction faces or secondary seal elements (rings,
bellows, synthetic membranes). It is advisable to stop
the pump as soon as possible. Have an approved
seal vendor replace or repair the seal.
6.2.5 Gland packing
6.2.5.1 Pump fitted with a packed gland
A well run in and correctly adjusted packing gland
requires little maintenance.
If, after some time, the leakage becomes too great,
the gland should be tightened again in order to return
these to a normal level.
If re-tightening is not possible, new packing must be
installed.
6.2.5.2 Gland packing inspection and removal
a) Remove the shield guards
b) Slide back the gland
c) Remove the packing rings with an extractor
designed for this purpose (including the lantern ring if
it exists; note its position and its direction of rotation).
d) Inspect the state of the sleeve surface; the
presence of many marked grooves will indicate that it
must be replaced.
e) Carefully clean the different pieces of the packing
gland.
6.2.5.3 Gland packing fitting
If the packing is supplied as cord the packing must be
cut so that the external diameter is lightly tightened
and there is an initial gap between the sleeve and the
packing ring.
For that purpose, wind the packing helically around
the shaft sleeve or a chuck of the same diameter.
(Take precautions to avoid damaging sleeve).
Example of str aight cut E xample of bevel cut
Ensure a tightening on the stuffing box
housing and not on the sleeve.