WABCO OptiTire System Description page 73

Workshop notes
Please perform wheel changes as follows:
1. Remove any dirt from the external sensor and PA tube.
2. Note ID of external sensor (engraved on top of the housing) and its position on the vehicle,
e.g. rear axle left, outside.
Alternative: Fix a plate with the description of the location to each external sensor.
3. Loosen the union nut of the PA tube on the tire valve.
4. Pull the PA tube from the valve.
5. First unscrew only those wheel nuts that fasten the external sensor.
6. Remove external sensor completely, together with the PA tube.
Do not turn the PA tube at the external sensor and do not remove the PA tube from external sensor
unnecessarily.
Prevent dirt from entering into the PA tube.
7. Check the PA tube for any damage.
8. Replace the PA tube if ageing ruptures or rubbing wear is visible see chapter 11.2.4 "Replacing PA
tubes (external sensor)", page 74.
9. Remove the remaining wheel nuts.
10. Change the wheel or tire.
11. Fit the wheel or wheels again.
12. Fix the wheel or wheels with a few wheel nuts to the wheel bolt to which neither the external sensor
nor the weight plate will be mounted.
While assembling the wheel make sure that the tire valve gets its original position.
With twin tires, the tire valves should be placed in opposite position.
13. Place the respective external sensor to its original position and fix it with wheel nuts.
With individual wheels, assemble the counterweight in the opposite of the external sensor.
14. Screw the union nut of the hose back on to the tire valve.
15. Tighten union nuts manually only.
16. Check that the connection is tight using a leakage indicating spray.
17. Tighten the wheel nuts crosswise according to the vehicle manufacturer's specifications.
Wheel with internal sensor
When changing a wheel with the internal sensor it must be ensured that the new wheel is also equipped
with a internal sensor. If this is not the case, the internal sensor must be installed in the new wheel (see
Chapter "7.3 Assembly of the internal sensor WIS", page 45 or Chapter "7.4 Assembly of the internal
sensor SMS", page 48).
For start-up, the new ID of this internal sensor must be learned. For this purpose the Diagnostic
Software must be opened.
"Module configuration" parameter setting
– Enter the new ID of the respective wheel position directly at the corresponding wheel position or
carry out a free assignment under Module assignment (see Chapter "7.3 Assembly of the internal
sensor WIS", page 45 or Chapter "7.4 Assembly of the internal sensor SMS", page 48).
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