15
LEROY-SOMER
2013.01 / k
Installation and maintenance
LSA 43.2/44.2 - 4 POLES
ALTERNATORS
3434 en -
4.6 - Dismantling, reassembly
During the warranty period, this
operation should only be carried out in
an LEROY-SOMER approved workshop
or in our factory, otherwise the warranty
may be invalidated.
Whilst being handled, the machine
should remain horizontal (rotor not
locked in position). Check how much the
machine weighs before choosing the
lifting method.
• Tools required
To fully dismantle the machine, we
recommend using the tools listed below:
- 1 ratchet s extension
- 1 torque wrench
- 1 set of flat spanners: 7, 8, 10, 12 mm
- 1 socket set: 8, 10, 13, 16, 18, 21, 22, 24 mm
- 1 size: 5 Allen key (eg. Facom: ET5), 6 Allen
key (ET6), 10 Allen key (ET10), 14 Allen key
(ET14)
- 1 T20 and T30 TORX bit
- 1 puller (U35) / (U32/350).
• Screw tightening torque
See section 5.4.
• Access to diodes
- Remove the air intake grille [51]
- Remove the surge suppressor [347]
- Disconnect the 6 diodes using an ohm-
meter or a battery lamp (see section 4.5.2)
- Replace the bridges, respecting the
polarity (see section 4.5.1)
- Replace the surge suppressor [347]
- Refit the air intake grille [51]
- Replace the terminal box lid [48]
• Access to connections and the
regulation system
The terminals are accessed directly by
removing the terminal box lid [48].
To access the AVR adjustment
potentiometers, the side plate [367] should
be removed.
• Replacing the NDE bearing
- Dismantling
- Remove the terminal box lid [48]
- Remove the air intake grille [51]
- Unscrew the fixing clamps on the power
output cables, remove the connector from
the exciter and the R 791 module.
- Remove the 4 nuts on the tie rods
- Remove the NDE shield [36] using a puller:
eg. U.32 - 350 (FACOM)
- Remove the ball bearing [70] using a screw
puller.
- Reassembly
- Heat the inner slipring of a new bearing by
induction or in a drying oven at 80 °C (do not
use an oil-bath) and fit it to the machine.
- Place the preloading wavy washer [79] in
the shield and fit a new O ring seal [349].
Refit the NDE shield and pass the bundle of
wires between the top bars of the shield.
- Refit the fixing clamps on the cables, the
R 791 module and the exciter connector.
- Refit the air intake grille [51].
- Replace the terminal box lid [48].
WARNING
Summary of Contents for LSA 43.2
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