EN – 7
EN
Maintenance
Replacement of external shaft seal
In the event of an external oil leak on the pump, it is necessary to change the
external shaft seal on the motor side (
see page N – 4
).
You will need:
a front seal replacement kit (
see page 5
),
a screwdriver,
a 3, 4 and 5 mm Allen wrench,
a lip seal mandrel (
see page 6
).
Stop the pump and disconnect the power cord motor.
Disconnect the pump from the installation to which it is connected.
If possible, position the pump vertically, with the motor at the top, resting on the front
side of the oil case; in this position, it is not necessary to drain the oil case. Otherwise,
disassemble the pump in the horizontal position, resting it on its base, after it has been
drained (
see Operating instructions
).
Disconnect the motor by unscrewing the 4 fastening screws, simultaneously and
alternately.
Remove the motor vertically.
Unscrew the fan fastening screw. Remove
the fan, the key and the support washer.
With a screwdriver, remove the shouldered
ring (
36
) and its O-ring (
35
).
Unscrew the two seal-holder fastening
screws (
37
,
38
) and remove the seal-holder
(
39
).
Remove the seal (
40
) from the seal-holder
as described on
page 14 (picture 1)
and
discard it.
Clean the metal parts. Inspect the wearing
side of the shaft sleeve: after cleaning, the
sleeve may show a perfectly normal trace
of rubbing (caused by polishing). Should
the sleeve show any signs of indentation or
grooves, it must be replaced.
Use new parts from the external shaft seal
replacement kit or from the overhaul kit.
Reassemble the lip seal (
40
) in its housing as
described on
page 14
.
Reinsert the new O-ring (
41a
) on the seal-holder (
39
).
Insert the shaft sleeve inside the shouldered ring (
36
).
Engage the reassembled seal-holder on its axis and screw onto the frame.
Insert the O-ring (
35
) in the shaft sleeve. Position the support washer. Then, install the
key, reassemble the fan and the motor in the reverse order of disassembly.
Immediately order an external shaft seal replacement kit or an overhaul kit (
see
page 5
).
35
36
39
40
41a
37
38
