SDMO R570U, User And Maintenance Manual

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14
LEROY-SOMER
2011.03/ g
Installation and maintenance
LSA 47.2 - 4 POLES
ALTERNATORS
3742 en -
4.6 - Dismantling, reassembly
(see sections 5.4.1. & 5.4.2.)
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 (see 4.8.3) before
choosing the lifting method.
4.6.1 - 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: 8 mm, 10 mm, 18 mm
- 1 socket set: 8, 10, 13, 16, 18, 21, 24, 30 mm
- 1 puller (U35) / (U32/350)
4.6.2 -Screw tightening torque
See section 5.4.
4.6.3 - Access to diodes
- Open the air intake grille (51).
- Disconnect the diodes.
- Check the 6 diodes using an ohmmeter or
a battery lamp (see section 4.5.2).
If the diodes are faulty,
- Remove the surge suppressor (347).
- Remove the 6 «H» nuts for mounting the
diode bridges on the support.
- Change the crescents, respecting the
polarity.
4.6.4 - Access to connections and the
regulation system
Access directly by removing the top of the
cover (48) or the AVR access door (466).
4.6.5 - Replacing the NDE bearing
- Remove the air intake grille (51).
- Remove the lid of the protective cover (48)
and the side panels (366) and (367).
- Remove the hook (21) and the cover rear
panel (365).
- Replace the hook (21) in order to manipulate
the flange.
- Disconnect the exciter wires (5+,6-).
If using a single-bearing or double-bearing
machine with the regreasable bearing
option:
- Remove the bearing thrust screws (78).
- Remove all 5 screws (37).
- Remove the shield (36).
- Take out the antifriction bearing (70) using
a puller with a central screw (see drawing
below).
- Fit the new antifriction bearing onto the
shaft after heating it by induction to
approximately 80 °C.
- Mount the new preloading (wavy) washer
(79) + the new “O” ring seal (349) in the
shield (36).
If using a single-bearing or double-bearing
machine with the regreasable bearing
option:
- Screw a threaded rod into the thrust
bearing (78).
- Refit the end shield on the machine using
a dowel and nut in the shaft extension (see
drawing).
WARNING
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