Electric Power Generation
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Installation and maintenance
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TALA40
Low Voltage Alternators - 4 pole
• Replacing the NDE bearing on single
bearing machines
Dismantling
- Remove the NOE shield [36].
- Remove the ball bearing [70] using a boit
puller.
Reassembly
- Heat the inner slipring of a new bearing by
induction or in a drying aven at 80 °C (do not
use an oil bath) and fit it to the alternator.
- Place the preloading wavy washer [79] in
the flange and fit a new O ring seal [349].
- Replace the NOE bracket [36].
• Accessing the main field and stator
Dismantling
Follow the procedure for dismantling
bearings.
- Remove the coupling dises (single bearing
alternator) and insert a tube of the
corresponding diameter on the shaft end or
a support made according the following
bellow.
- Rest the rotor on one of its pales. then si ide
it out. Use the tube as a lever arm to assist
dismantling.
-After extraction. be careful with the fan. lt is
necessary to replace the fan in case of
disassembling.
- After extracting the rotor. be careful not to
damage the fan and place the revolving field
on special V-blacks.
NOTE: If intervention is required on the
main field (rewinding. replacement of
components). the rotor assembly must
be rebalanced.
Reassembly
- Follow the dismantling procedure in
reverse order.
Take care not to knock the windings when
refitting the rotor in the stator.
If you replace the fan. respect the assembly
guide according the following bellow. Use a
tube and a boit.
Follow the procedure for reassembling the
bearings.
LEROY-SOMER'"
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