2021.04 / l
Electric Power Generation
18
Installation and maintenance
TAL 047
Low Voltage Alternator - 4 pole
5378 en -
4.6 - 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 (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: 8 mm, 10 mm, 18 mm
- 1 socket set: 8, 10, 13, 16, 18, 21, 24, 30 mm
- 1 puller (U35) / (U32/350)
• Screw tightening torque
See section 5.4.
• Access to diodes
- Open the air intake grille (51).
- Disconnect the diodes.
- Check the diodes using an ohmmeter or a
battery lamp.
If the diodes are faulty:
- Remove the surge suppressor (347).
- Remove the «H» nuts for mounting the
diode bridges on the support.
- Change the crescents, respecting the
polarity.
• Access to connections and the
regulation system
Access directly by removing the top of the
terminal box lid (48).
• Replacing the NDE bearing on single
bearing machines
- Remove the air intake grille (51).
- Remove the the terminal box lid (48) and
the side panel (366).
- Remove the hook (21) and the cover rear
panel (365).
- Replace the hook (21) in order to
manipulate the flange.
- Disconnect the exciter wires.
- Remove the bearing (78) thrust screws.
- Remove all screws (36).
- 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).
- 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).
- Slide the threaded rod into the shield hole
to make it easier to assemble (see basic
diagram).
WARNING