Lenze MDxMA-MHxMA-MFxMA-MDERA-MHERA Three-phase AC motors - Manual (Page 50)

Maintenance/repair
Maintenance operations
Rotor replacement
8
l
50 BA 33.0005−EN 2.0
8.3.8 Rotor replacement
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Danger!
The brake must be free of residual torque.
1. Loosen the connecting cable.
2. Evenly release the screws and remove them completely.
3. Completely remove the stator from the end shield. Observe the connecting cables.
4. Completely remove the rotor from the hub.
5. Check the toothed part of the hub.
6. In case of wear, replace the hub, too.
7. Check the friction surface of the end shield. If the flange / friction plate is severely
gouged, it must be replaced. If the end shield is severely gouged, the friction surface
must be reprocessed.
8. Measure the rotor thickness (new rotor) and the height of head of the sleeve bolts
using a caliper gauge.
9. The distance between the stator and the armature plate is calculated as follows:
Distance = rotor thickness + s
Lürated
− height of head
"s
Lürated
", (
¶ 51)
10. Evenly remove the sleeve bolts until the calculated distance is reached between the
stator and the armature plate.
11. Completely mount the new rotor and set the stator, (
¶ 51).
12. Connect the connecting cable again.