WITTUR WSG-TB.3 series, Operating Instructions Manual

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Maintenance and repair
INTORQ | BA 14.0210 | 12/2016 42
7.3 Maintenance
7.3.1 Check the rotor thickness
1. Stop the motor and control system!
2. Remove the motor cover and remove the cover ring, if present.
3. Measure the rotor thickness using a caliper gauge.
4. Compare the measured rotor thickness against the minimal permitted rotor thickness (
15).
5. If required, replace the rotor completely. Refer to 43 for the description.
7.3.2 Check the air gap
1. Stop the motor and control system!
2. Measure the air gap "s
L
" near the fixing screws between the armature plate and the stator using a feeler
gauge.
3. Compare the measured air gap with the maximum permitted air gap "s
Lmax
" ( 15).
4. If required, replace the rotor completely. Refer to 43 for the description.
NOTICE
Brakes with defective armature plates, socket head cap screws, springs or counter friction
faces must always be replaced completely.
Observe the following for inspections and maintenance works:
❚
Contamination by oils and greases should be removed using brake cleaner, or the brake
should be replaced after determining the cause. Dirt and particles in the air gap between
the stator and the armature plate endanger the function and should be removed.
❚
After replacing the rotor, the original braking torque will not be reached until the run-in op-
eration for the friction surfaces has been completed. After replacing the rotor, the run-in ar-
mature plates and counter friction faces have an increased initial rate of wear.
DANGER
Danger: rotating parts!
The motor must not run during the check.
DANGER
Danger: rotating parts!
The motor must not run during the check.