Bendix Commercial Vehicle Systems SB-7 AIR DISC BRAKE - Manual (Page 20)

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5.3.3 Wear Indicators
There are two types of Pad Wear Indicators available
to accommodate the differences in vehicle types and
manufacturers, including:
a) In - Pad Normally Closed Indicator - Circuit is
broken when Pad Wear reaches the limit.
b) In - Pad Normally Open Indicator - Circuit is
made when Pad Wear reaches the limit.
c) Wear Indicator using built in Potentiometer. This
is available either as an on/off version or
as a continuous signal version which can be
linked to the vehicle’s electronic monitoring
systems.
An optical or acoustic device may be linked to any of
the above.
Important
Please refer to the specifications provided by the
Vehicle Manufacturer
M+P-KN-007
M+P-KN-008
See Figure to the right.