Specifications
11
INSTALLATION AND MAINTENANCE
LSA 50.1 / LSA 51.2
ALTERNATORS
SERVICING - MAINTENANCE
Réf. 3281 en - 10.2007 / g
LEROY-SOMER
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 approved workshop or in our factory,
otherwise the warranty may be invalidated.
Whilst being handled, the machine should remain
horizontal.
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, 10, 18, 19 mm
- 1 socket set : 8, 10, 13, 16, 18, 19, 21, 24, 30 mm
- 1 socket with male ferrule : 5 mm
- 1 puller (U35) / (U32/350)
4.6.2 - Screw tightening torque
4.6.3 - Access to diodes
- Open the air intake grille (47).
- Disconnect the diodes and check them using an ohmmeter
or a battery lamp (see section 4.5.2).
- Reassemble and reconnect the unit.
4.6.4 - Access to connections and the
regulation system
Access directly by removing the box lid (48) and the
inspection door (59).
4.6.5 - Fitting and replacing the NDE bearing
- Remove the air intake grille (47).
- Disconnect the diode bridge (106) : 5 leads.
- Remove the 3 screws of the diode bridge on the shaft.
- Remove the diode bridge.
- Remove the 4 screws (72) of the inner bearing retainer (78).
- Remove the 6 six screws of the shield (36) on the stator (1).
- Tap off the NDE shield (36) together with the exciter field
(90) of the stator (1).
- Extract the ball bearing (70) with a puller.
- Check the "O" ring seal (349) and the preloading wavy
washer (79) and replace them if necessary.
- Fit a new bearing, after heating it by induction system to
80°C maximum.
WHEN DISMANTLING THE MACHINE, ALWAYS CHANGE
THE BEARINGS.
IDENTIFICATION screw Ø Torque N.m
Diode bridge screw M 6 5.6
Diode nut M 12 10
Shield / Frame screw M 12 62
Discs / Sleeve screw M 20 300
Earth screw M 12 46
Grille screws M 12 46
Terminal box screws M 6 5.6
Stator connection nut M 12 46
72
79
70
78
36
36
349
72
70
78
40
33
Ø130
Ø140
Ø 230
Ø 210
LSA 50.1
LSA 51.2
WARNINGWARNING