Maintenance and repair
INTORQ | BA 14.0217 | 09/2019
73
9.3.1
Checking the components
With mounted brake
¾
Check release function and control
Refer to Release / voltage, Page 74
¾
Measure the air gap (adjust if re-
quired)
Refer to Adjusting the air
gap, Page 75
¾
Measure the rotor thickness (replace
rotor if required)
Refer to Check the rotor thick-
ness, Page 73
¾
Thermal damage of armature plate or
flange (dark-blue tarnishing)
After removing the
brake
¾
Check the play of the rotor gear teeth
(replace worn-out rotors)
Refer to Replace rotor, Page 75
¾
Check for breaking out of the torque
support at the guide parts and the
armature plate
¾
Check the springs for damage
¾
Check the armature plate and flange
or end shield
– Flatness depending on the size
Refer to the table Design of end
shield and shaft, Page 42
– Max. run-in depth = rated air gap
for the size
Refer to the table Rated data for air
gap specifications, Page 24
9.3.2
Check the rotor thickness
DANGER
Danger: rotating parts!
The motor must
not
be running when checking the rotor thickness.
1. Remove the fan cover.
2. Remove the cover ring, when present.
3. Measure the rotor thickness using a calliper gauge. For the friction-plate design: observe the edging
on outer diameter of friction plate.
4. Compare the measured rotor thickness with the minimum permissible rotor thickness. (Refer to the
values in the table Rated data for air gap specifications, Page 24.) If the measured rotor thickness is
insufficient, the rotor must be replaced completely. (Refer to Replace rotor, Page 75 for the descrip-
tion.)
