Maintenance and repair
Kendrion INTORQ | BA 14.0225 | 05/2022
48
8.3
Maintenance
Notice
Brakes with defective armature plates, springs or flanges must be completely replaced.
Observe the following for inspections and maintenance works:
¾
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.
¾
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 the flanges have an increased initial rate of wear.
8.3.1
Brake testing
Extended inspection/
maintenance after re-
moval of brake
¾
Adjusting the air gap
Refer to Adjusting the air
gap, Page 49
¾
Checking the rotor thickness
Refer to Checking the rotor thick-
ness, Page 50
¾
Check the play of the rotor gear
teeth (replace worn-out rotors)
Refer to Replacing the ro-
tor, Page 50
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 counter friction surface
– Thermal damage (dark blue tar-
nish)
– Flatness depending on the size Refer to the Design of end shield and
– Max. run-in depth = rated air
gap for the size
Refer to the Characteristics for air
gap specifications, Page 17 table.
8.3.2
Checking the air gap
DANGER
Danger: rotating parts!
The motor must
not
run while the air gap is being checked.
1. Measure the air gap s
L
between the armature plate and the stator near the fastening screws using a
feeler gauge. (Refer to table Characteristics for air gap specifications, Page 17 for the values.)
2. Compare the measured air gap with the value for the max. permissible air gap s
Lmax
. (Refer to the
Characteristics for air gap specifications, Page 17 table for the values.)
3. Adjust the air gap to s
LN
. (Refer to Adjusting the air gap).
