WABCO OptiTire System Description page 42

Installation
7.2 Assembly of the external sensors WM2
WARNING
Risk of accidents due to loosening the fastening screws of the external sensor
The safe fixing of the wheel module is only possible when the external sensor housing has a tight fit
to the bracket.
– Never loosen the fastening screws fixing the sensor housing on the bracket.
The vehicle does not need to be jacked up when only four wheel nuts are removed.
Preparing the installation
– Read chapter "6.1.1 The external sensor (WM2)", page 22.
– If necessary, also remove the rim protecting ring.
Installation of the external sensor
1. Loosen and remove two wheel nuts positioned next to each other near to the valve.
2. Check if the position of the external sensor is suitable for connecting to the PA tube and the valve.
Ö The PA tube should be able to be guided to the tire valve without stretching, twisting or
deforming.
3. Position the external sensor on the wheel bolts.
4. Screw the wheel nuts back on.
5. Remove the white protective cap from the pressure connection.
Assembly of the counterweight
1. Loosen the wheel nuts that are exactly opposite of the external sensor (trailer). If the counterweight
has 3 holes, loosen another nut clockwise to the left (front axle, load axle see chapter
"Counterweight", page 25).
2. Position the counterweight on the wheel bolts.
3. Screw the wheel nuts back on.
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