SDMO RENTAL POWER R550C2 User And Maintenance Manual page 241

LEROY-SOMER
- Slide the threaded rod into the shield hole
to make it easier to assemble (see basic
diagram).
4 78 36
Rotor
NDE shield
- Fit the thrust bearing screws (78), remove
the threaded rod, fit the other screw and
tighten up the assembly.
- Tighten the 5 bearing screws (37).
- Reconnect exciter wires E+, E-.
- Finish reassembling the cover.
WARNING
When dismantling the shields, you will
need to change the antifriction bearings,
the "O" ring seal, the preloading (wavy)
washer and adhesive paste.
4.6.6 - Replacing the DE bearing
- Remove the air outlet grille (33).
- Remove the 6 screws (31) from the DE
shield and the 4 screws (62) from the inner
bearing retainer.
- Remove the shield (30).
- Take out the ball bearing (60) using a puller
with a central screw (see section 4.6.5).
- Fit the new bearing, after heating it by
induction to approximately 80 °C.
- Screw a threaded rod into the thrust
bearing (68).
- Refit the shield (30) on the machine.
Installation and maintenance
LSA 47.2 - 4 POLES
ALTERNATORS
Threaded rod
Dowel
Nut
239/298
- Slide the threaded rod into the shield hole
to make it easier to assemble (see basic
diagram).
- Tighten the bottom thrust bearing screws
(68), remove the threaded rod and fit the
other screws.
- Tighten the 6 shield screws (31).
- Refit the air outlet grille (33).
4.6.7 - Dismantling the rotor assembly
- Remove the NDE shield (36) as described
in section 4.6.5.
- Remove the DE shield (30) as described
in section 4.6.6 if it is a double-bearing
machine.
- Support the DE rotor (4) with a strap or with
a support constructed in accordance with
the following drawing.
- Move the strap as the rotor moves in order
to distribute the weight over it.
WARNING
When dismantling the rotor involves
changing parts or rewinding, the rotor
must be rebalanced.
4.6.8 - Reassembling the machine
- Mount the rotor (4) in the stator (1) (see
drawing above) taking care not to knock the
windings.
3742 en - 2011.03/ g
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