Dismantling, Reassembly - Leroy Somer LSA 49.1 4P Manuel D'utilisation Et D'entretien

LEROY-SOMER

4.6 - Dismantling, reassembly

5.4.1 & 5.4.2)
During the warranty period, this operation should only be
carried out in an approved workshop or in our factory,
otherwise the warranty may be invalidated.
Whilst being handled, the machine should remain
horizontal (rotor not locked when moved).
4.6.1 - Tools required
To fully dismantle the machine, we recommend using the
tools listed below :
- 1 ratchet spanner + 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 socket with male ferrule : 5 mm
- 1 puller (U35) / (U32/350)
4.6.2 - Screw tightening torque
IDENTIFICATION
Exciter screw
Diode / Star bridge
Diode nut
Flange / Frame screw
NDE shield / frame screw
Discs / hub screw
Earth screw
Grille screws
Cover screws
Stator connection nut
4.6.3 - Access to diodes
- Open the air intake grille (51).
- Disconnect the diodes.
- Disconnect the 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" mounting nuts for the diode bridges on the
INSTALLATION AND MAINTENANCE
LSA 49.1 4P
ALTERNATORS
SERVICING - MAINTENANCE
(see sections
screw Ø Torque N.m
M6 17
M 6 10
M 6 3
M 14 110
M 14 110
M 20 460
M 12 35
M 6 5
M 6 5
M 12 35
support.
- Change the fitted caps, respecting the polarity.
4.6.4 - Access to connections and the
regulation system
Access directly by removing the box lid (48) or the AVR
access door (466).
4.6.5 - Replacing the NDE bearing on
machines connected to a diesel engine
- Remove the lid of the protective cover (48) and the AVR
inspection door (466).
- Disconnect the AVR.
- Take off the panels (367 and 368) and the grilles (254 and
255).
- Disconnect the stator connections (T1 to T12).
- Remove the neutral link (278).
- Take out the connector link assembly (281 + 279).
- Take out the connection plate assembly (281 + 270).
- Remove the rear cross-member (269) and the rear panel
(365).
- Remove the air intake grille (51).
- Remove the 4 bearing thrust screws (78).
- Remove all 4 screws (37).
- Take out the bearing (36).
- Remove the ball bearing (70) using a puller with a central
screw (see fig. below).
- Check the state of the "O" ring (349) and, if necessary,
change it.
- Fit the new bearing, after heating it by induction at
approximately 80°C.
WARNING
REPLACE THE DISMANTLED BEARING WITH A NEW
ONE.
4.6.6 - Replacing the DE bearing
- Take out the screws (31) and (62).
- Take out the bearing (30).
- Take out the circlips (284).
- Remove the ball bearing (60) using a puller with a central
screw.
- Fit the new bearing, after heating it by induction at
approximately 80°C.
WARNING
REPLACE THE DISMANTLED BEARING WITH A NEW
ONE.
Ref. 3007 GB - 4.33/a - 10.00
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