j | BA 14.0168 | 10/2013
49
7.3.1 Checking the component parts
With assembled brake | Check function of ventilation and control
| Measure the air gap (adjust if necessary)
| Measure the rotor thickness (replace rotor if
necessary)
| Thermal damage to armature plate or flange (dark blue
tarnishing)
50
50
49
After removing the brake | Check clearance of the rotor gearing (replace
worn-out rotors)
| Wear of the torque bearing on threaded sleeves, dowel
pins and armature plate
| Checking springs for damage
| Checking armature plate and flange/endshield
| Evenness size 06...12 < 0.06 mm
| Evenness from size 14 on < 0.1 mm
| max. run-in depth = rated air gap of brake size
51
7.3.2 Checking the rotor thickness
Danger!
When the rotor thickness is checked, the motor must not run.
1. Remove fan cover and cover ring if attached.
2. Measure rotor thickness with calliper gauge. If a friction plate is attached, ensure a
flanged edge at the outer diameter of the friction plate.
3. Compare measured rotor thickness with minimally permissible rotor thickness
(values 15).
4. If required, exchange the entire rotor. Description 51.
7.3.3 Checking the air gap
Danger!
The motor must not be running when checking the air gap.
1. Check the air gap ”s
L
” near the fixing screws between the armature plate and stator
using a feeler gauge ( 15).
2. Compare air gap measured to maximally permissible air gap ”s
Lmax.
”( 15).
3. If required, set air gap to ”s
LN
”( 50).
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