30
OPTIONS
FFB Brake Motors Maintenance Guide
5287 en - 2015.04 / a
6.4 - Marks (Loosening-Wear)
6.4.1 - Wear mark
- Exploded view
1906
1100
1907
1102
1904
1905
- Parts list
Item
Description
Qty
1100
Face plate
1
1102
Armature
1
1904
Wear indicator microcontact
1
1905
Fixing screw on item 1904
2
1906
Contact screw on item 1904
1
1907
Lock nut (item 1906)
1
• Operation:
For brakes fitted with a wear indicator, if the brake pad is
worn (+ 0.6 mm) the armature actuates the microcontact
fastened on the back plate, indicating that the air gap requires
adjustment or the pad changed, when the latter is thinner than
the minimum required (see procedure "Air gap adjustment"
§2.5).
• Adjustment and removal:
To adjust the microcontact
1904
, engage the screw
1906
into the armature
1102
, position a 0.5 mm shim between the
screw head and the microcontact sensor
1904
. Unscrew the
screw
1906
until hearing the "click" of switching. Block the
screw
1906
with the lock nut
1907
then remove the shim.
For disassembly, return to the beginning of the cover removal
procedure. Unscrew the screws
1905
then remove the
microcontact
1904
. Unscrew the locknut
1907
then unscrew
the contact screw
1906
.
6.4.2 - Loosening indicator
- Exploded view
1901 1900
1105
1903
1902
1102
- Parts list
Item
Description
Qty
1105
Yoke
1
1102
Armature
1
1900
Loosening indicator microcontact
1
1901
Fixing screw (item 1900)
2
1902
Contact screw on item 1900
1
1903
Lock nut (item 1902)
1
• Operation:
For brakes fitted with a loosening indicator, when the brake
is supplied, the armature actuates a microcontact (on-off)
fastened to the yoke, indicating brake opening. Upon a power
failure, the microcontact changes state to confirm brake
closing.
• Adjustment and removal:
To adjust the microcontact
1900
, engage the screw
1902
into the armature
1102
, position a 0.2 mm shim between the
screw head and the microcontact sensor
1900
. Unscrew the
screw
1902
until hearing the "click" switching. Block the screw
1902
with the lock nut
1903
then remove the shim.
For disassembly, return to the beginning of the cover removal
procedure. Unscrew the screws
1901
then remove the
microcontact
1900
. Unscrew the locknut
1903
then unscrew
the contact screw
1902
.
Summary of Contents for Leroy-Somer FFB Series
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