English
20
Wilo AG 09/2005
6.2.2 Routine inspection (daily/weekly)
a) Check operating behavior. Ensure noise, vibra-
tion and bearing temperatures are normal.
b) Check that there are no abnormal fluid or lubri-
cant leaks (static and dynamic seals) and that any
sealant systems (if fitted) are full and operating
normally.
c) Pump fitted with a stuffing box: leakage of 20
drops per minute.
d) Pump fitted with a mechanical seal: no leakage.
e) Check the level and condition of oil lubricant.
On grease lubricated pumps, check running hours
since last recharge of grease or complete grease
change.
6.2.3 Periodic inspection (six monthly)
b) Check pump-running records for hourly usage
to determine if bearing lubricant requires chan-
ging.
c) The coupling should be checked for correct
alignment and worn driving elements.
Ensure that your equipment corresponds to the
arrangements of this leaflet.
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 appro-
ved 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 pre-
sence 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 tigh-
tened 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)
Setting of packing
Follow the instructions:
a) Assemble of the packing in S.
b) Stagger by about 90° between two rings.
c) Assemble packing after packing.
The following checks should be made
and the appropriate action taken to
remedy any deviations:
a) Check foundation bolts for security of
attachment and corrosion.
If a check shows a bad running of the
motor pump unit, the user must:
Refer to the "fault finding chart" chapter 7
of this leaflet to apply the recommended
solutions.
CAUTION!
CAUTION!
NOTE:
Ensure a tightening on the stuffing box
housing and not on the sleeve.
CAUTION!
