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Figure 7-1. The bearing puller.
6.
Check the O-ring seal and the preloading wavy washer and replace them (if
necessary)
Re-fitting the new bearing
1.
Clean the shaft end.
2.
Fit a new bearing, after heating it by induction system to 80 °C maximum.
NOTE: Do not hit or press to the outer ring during assembly, as this will
damage the balls.
3.
Install bearing retainers, if needed.
4.
Attach the DE shield to the stator with 8 screws.
7.5.7 Fitting and replacing the closed NDE bearing
Remark, that if the generator is delivered with optional PMG-unit (
permanent
magnet
), the bearing removal procedure is slightly different compared to design
without this optional PMG.
Bearing removal
1.
Support the shaft.
2.
Remove the grille of NDE shield.
3.
Remove PMG stator,
4.
Remove PMG rotor attached with one bolt and a pin. For more detailed
information about this optional PMG-unit, see
Annex 9. Permanent Magnet
Regulator (PMG) User’s Manual.
5.
Remove the NDE shield
6.
Extract the ball bearing with a puller (see
Figure 7-1. The bearing puller
).
7.
Check the O-ring seal and the preloading wavy washer and replace them (if
necessary)
Refitting the new bearing
1.
Clean the shaft end.
2.
Fit a new bearing, after heating it by induction system to 80 °C maximum.
NOTE: Do not hit or press to the outer ring during assembly, as this will
damage the balls.
3.
Check the preloading wavy washer and replace it (if necessary).
4.
Attach the NDE shield.
5.
Attach the PMG stator and PMG rotor, see
Annex 9. Permanent Magnet
Regulator (PMG) User's Manual.
6.
Attach the air intake grille to the NDE shield.
