Maintenance/repair
7
j
| BA 14.0190 - EN | 02/2007
36
7
Maintenance/repair
7.1
Inspection intervals
The wear of the friction lining of the rotor depends on the operating conditions. The time until
readjustment does not only depend on the friction work. The friction work per operation
decreases steadily until readjustment takes place. High speed differences additionally reduce
the friction work until readjustment. The inspection intervals must be adapted to the operating
conditions and can be prolonged if the wear is small.
7.2
Inspections
7.2.1
Rotor thickness
Danger!
The motor must be at standstill when checking the rotor thickness.
1. Remove motor cover and - if mounted - remove seal.
2. Measure the rotor thickness using a caliper gauge.
3. Compare the measured rotor thickness with the minimum permissible rotor thickness
(see chapter 3.3).
4. If necessary, replace the rotor. See chapter 7.3.2.
7.2.2
Air gap
Danger!
The motor must be at standstill when checking the air gap.
1. Measure the air gap ”s
Lü
” between armature plate and rotor using a feeler gauge (3.3).
2. Compare the measured air gap to the maximum permissible air gap ”s
Lümax.
” (see
table chapter 3.3).
3. If necessary, adjust air gap to ”s
Lürated
”. See chapter 7.3.1.
