Wittur servogearless WSG-S3.4 Instructions De Service page 86

Maintenance and repair
7.3.2 Check the air gap
1. Stop the motor and control system!
2. Measure the air gap "s
gauge.
3. Compare the measured air gap with the maximum permitted air gap "s
4. If required, replace both rotors completely.
7.3.3 Replacing the rotor
1. Switch off voltage!
2. Disconnect the connection cable.
3. Loosen the screws evenly and remove them completely.
4. Remove the complete stator from the bearing shield. Pay attention to the connection cable.
5. Pull the complete rotor from the hub.
6. Check the gear teeth of the hub.
7. Replace the hub if it is worn.
8. Check the friction surface on the bearing shield. In case of strong scoring at the flange, replace the
flange. In case of strong scoring on the bearing shield, rework the friction surface.
9. Measure the rotor thickness (new rotor) and head height of the sleeve bolts with a caliper gauge.
10. Calculate the distance between the stator and the armature plate as follows:
Distance = rotor thickness + s
("s "
LN
11. Unscrew the sleeve bolts evenly until the calculated distance between the stator and armature plate is
reached.
12. Install and adjust the new complete rotor and stator (
13. Reconnect the connection cable.
INTORQ | BA 14.0196 | 04/2016
DANGER
Danger: rotating parts!
The motor must not run during the check.
" near the fixing screws between the armature plate and the stator using a feeler
L
DANGER
Danger: rotating parts!
The brake must be free of residual torque.
LN - head height
16)
" ( 16).
Lmax
23).
45