Nidec LEROY-SOMER LSA H 49.1, Руководство по установке и обслуживанию

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2020.05 / f
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Electric Power Generation
Installation and maintenance
LSA R/H 49.1
Low Voltage Alternator - 4 pole
4528 en -
4.9 - Dismantling, reassembly
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.
• 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 : 9 mm, 10 mm, 18 mm
- 1 socket set : 10, 13, 17, 18, 19, 24 mm,
- 1 puller (U35) / (U32/350)
- 1 hexagonal wrench 6 mm - 10 mm
• Screw tightening torque
IDENTIFICATION screw Ø Torque N.m
Exciter screw M6 8.3
Diode / Star bridge M6 10
Diode nut M6 3
DE shield / frame screw M12 70
NDE shield / frame screw M12 70
Bush / casing M12 70
Earth screw M12 35
Grille screws M6 4
Cover screws M6 5
Stator connection nut M12 35
• Access to diodes
- Remove the diode access door (140).
- Disconnect the diodes.
- Check 12 diodes using an ohmmeter or a
battery lamp.
If the diodes are faulty :
- Remove the surge suppressor (347).
- Remove the 6 «H» mounting nuts for the
diode assembly on the support.
- Change the fitted caps, respecting the
polarity.
• Access to connections and the
regulation system
Access is easy after the hood has been
removed (132).
• Replacing the NDE bearing
- Remove the terminal block cover (132).
- Unplug (+ et -) field system.
- If bearing probe, unplug at the terminal,
break the network circlips up to the bearing.
On LSA R :
- Dismantle the air intake grid (51).
- Dismantle the air turbine (118).
- Dismantle the air turbine cover (117).
- Remove the V-Ring gasket (249).
On LSA H : Remove external cap (71).
- Remove the inner hood bearing screws
(78).
- Remove the rear flange (82).
- Remove the ball bearing (70) using a puller
with a central screw (see fig. below).
- Change the «O» ring (349).
- Fit the new bearing, after heating it by
induction at approximately 80°C.
WARNING
Replace the dismantled bearing with a
new one.
• Replacing the DE bearing
- If bearing probe, unplug at the terminal,
break the network clips up to the bearing.
- Remove the V-Ring gasket (247).
- Remove the inner hood bearing screws
(68).
- Remove the rear flange (410).
- Take out the circlips (284).
- Remove the ball bearing (60) using a puller
with a central screw.