16
LEROY-SOMER
2013.01 / k
Installation and maintenance
LSA 43.2/44.2 - 4 POLES
ALTERNATORS
3434 en -
Rotor
NDE shield
Screw rod
When dismantling the shields, you will
need to change the antifriction bearings,
the “O” ring seal, the preloading (wavy)
washer and adhesive paste.
• Replacing the DE bearing
- Dismantling
- Uncouple the alternator from the prime
mover.
- Remove the 8 assembly screws.
- Remove the DE shield [30].
- Remove the NDE shield (see section
4.6.5.1)
- Remove both ball bearings [60] and [70]
using a puller with a central screw.
- Reassembly
- Heat the new bearings by induction or in a
drying oven at 80°C (do not use an oil-bath)
and fit them to the machine.
- Check that both the preloading wavy
washer [79] and the new O ring seal [349]
have been fitted on the NDE shield [36].
Refit the NDE shield and pass the bundle of
wires between the top bars of the shield.
- Refit the DE shield [30] and tighten the 4
fixing screws.
- Check that the machine assembly is
correctly mounted and that all screws are
tightened.
• Accessing the main field and stator
- Dismantling
Follow the procedure for dismantling the
bearings (see sections 4.6.5.1 and 4.6.6.1)
- Remove the coupling disc (single-bearing
alternator) or the DE shield (two-bearing
alternator) and insert a tube of the
corresponding diameter on the shaft end.
- Rest the rotor on one of its poles, then slide
it out. Use the tube as a lever arm to assist
dismantling.
- After extraction of the rotor, be careful not
to damage the fan. If the fan is dismantled, it
is essential that it is replaced for the 43.2.
NOTE: If intervention is required on the
main field (rewinding, replacement of
components), the rotor assembly must
be rebalanced.
- Reassembling the main field
- Follow the dismantling procedure in
reverse order.
Take care not to knock the windings when
refitting the rotor in the stator.
- If the fan is being replaced on the 43.2,
assemble the parts as shown in the following
diagram. Fit a tube and a threaded screw.
On the 44.2 the fan is fixed by screws on the
hub.
Follow the procedure for reassembling the
bearings (see sections 4.6.5.2 and 4.6.6.2).
WARNING
Summary of Contents for LSA 43.2
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