Specifications

89
Maintenance
Replacement of front seal
In the event of an external oil leak
on the pump, it is necessary to change
the shaft seal on the motor side.
You will need:
- a front seal replacement kit
(see page 90),
- a screwdriver,
- a 3, 4 and 5 mm Allen wrench.
• 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.
• 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 shaft sleeve and its O-ring.
• Unscrew the two seal-holder fastening screws and remove the seal-holder.
• Remove the seal from the seal-holder as described on page 95 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.
• Preferably use new parts from the seal kit or set of seals.
• Reassemble the lip seal in its housing as described on page 95.
• Reinsert the new O-ring on the seal-holder.
• Insert the shaft sleeve inside the seal-holder.
• Engage the reassembled seal-holder on its axis and screw onto the frame.
• Insert the O-ring 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 a replacement maintenance set or kit (see page 90).