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Service and maintenance
8.2 Description of maintenance and repair work
8.2.6.4
Replacing the friction lining
Switch off the power supply to the drive unit
The brake must be in a torque-free condition.
Secure the drive unit to prevent it from being started up unintentionally.
Attach a warning notice to the start switch.
Procedure
1. Remove the fan cover.
When combined with manual release:
Unscrew the manual brake release lever.
With forced ventilation:
Remove the fan cover with forced ventilation.
2. Remove the connection cable.
3. Remove the fan locking ring and pull out the fan.
4. Loosen the brake screws evenly and remove them completely.
5. Pull the rotor completely off the hub.
6. Check the teeth on the hub.
7. Check the friction surface on the bearing shield. If there is severe striation on the friction
plate or flange, replace the friction plate or flange. Rework the friction surfaces if there is
severe striation on the bearing shield.
8. Measure the thickness of the new rotor and the head height of the sleeve screws with a
caliper gauge.
9. Calculate the gap between the magnet part and the armature disk as follows:
Gap = Rotor thickness + s
10.Unscrew the sleeve screws evenly until the calculated gap between the magnet part and
the armature disk is set.
11.Mount the new rotor and the magnet part and adjust it.
12.Connect the connection cable.
13.Mount the fan cover.
You have now replaced the friction lining of the brake.
60
WARNING
- head height.
LüNenn
Operating Instructions, 02/2015, 70000004023775
BA 2320
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