Indicators (Loosening / Wear) - Emerson Leroy-Somer FFB Series Maintenance Manual

6.4 - Marks (Loosening-Wear)
6.4.1 - Wear mark
- Exploded view
1906
1905
1904
1102
- Parts list
Item
1100 Face plate
1102 Armature
1904 Wear indicator microcontact
1905 Fixing screw on item 1904
1906 Contact screw on item 1904
1907 Lock nut (item 1906)
• 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.
30
1100
1907
Description
OPTIONS
6.4.2 - Loosening indicator
- Exploded view
- Parts list
Qty Item
1 1105 Yoke
1 1102 Armature
1 1900 Loosening indicator microcontact
2 1901 Fixing screw (item 1900)
1 1902 Contact screw on item 1900
1 1903 Lock nut (item 1902)
• 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.
1901
1900
1105
1903
1102
Description
FFB Brake Motors Maintenance Guide
5287 en - 2015.04 / a
1902
Qty
1
1
1
2
1
1