31
Appendix I
3. If the indicator lamp comes on for three seconds then goes out, this indicates a correct installation.
The end of line test is complete.
If the ABS indicator lamp comes on and stays on, check the sensor installation.
Remove the power from the ABS and raise the sensed wheels so they may be rotated.
Apply emergency air to
fi
ll the air tanks and release the spring brakes so that the wheels may be
rotated. Repeat Steps 1 and 2.
Rotate each sensed wheel — one at a time — at a rate of 1/2 revolution per second. This rate
equals a wheel speed of approximately 4 mph (7 kph).
The ABS indicator lamp should now go out and stay out indicating a correct installation. The end of line test
is complete.
4. If the ABS lamp does not go out, there is a sensor gap problem or hardware fault. Adjust the sensor
and, if necessary, perform a fault code check.
5.2.4.4 Sensor Gap Adjustment
Push the sensor into its holder until it contacts the tooth wheel. At installation, there must be no gap
between the sensor and the tooth wheel.
Measure the AC voltage output. The value should be 0.2 volt AC when the wheel is rotated at a rate of 1/2
revolution per second.
Perform any necessary repairs.
Repeat the end of line test. If the trailer lamp still does not go out, a system fault exists. Perform a fault
code check.
6 Appendix I
6.1 Installing Sensors on Non-ABS-Prepped Axles
Sensor locations vary due to suspension type. WABCO recommends placing the sensors on the axle that
will provide the most braking performance. The trailer manufacturer, suspension manufacturer, along with
WABCO, work together to determine this information. Contact the necessary party for further information.
1. Apply a mineral oil-based grease that contains molydisul
fi
de to the sensor spring clip, the body of the
sensor and the bore of the sensor block. The grease must be anti-corrosive and contain adhesive
properties that will continuously endure temperatures from
−
40° to 300°F (
−
40° to 150°C).
Lubricants approved for use on WABCO sensors and spring clips are as follows. The use of non-
approved lubricants is at your own risk. Please note that non-approved lubricants can reduce the
performance of the parts or lead to damage of the product that may not be covered under warranty.
Mobilith SHC-220 (Mobil)
TEK 662 (Roy Dean Products)
Staburags NBU 30 PTM (Kluber Lubrication)
Valvoline EP 633
2. Push the spring clip into the sensor holder from the inboard side, until the spring clip tabs are against
the sensor holder. Push the sensor into the spring clip as far as possible. Use WABCO spring clips to
ensure a correct
fi
t.