WABCO OptiTire, System Description

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Workshop notes
10.2.4 Replacing PA tubes (external sensor)
Proceed as follows when replacing a defective PA tube:
– Loosen the PA tube from the valve.
– Unscrew the V203 connection together with the PA tube from the external
sensor.
!
When removing the PA tube from the external sensor, take care that the thread
on the external sensor is kept clean.
– Check the thread on the external sensor for damage.
– With damaged thread, replace the complete external sensor.
– Screw the new V203 connection into the thread of the external sensor.
A new V203 connection can be obtained using the WABCO part number
893 770 005 2.
VOSS SV 203 connection
– Tighten the V203 connection with a tightening torque of 3 Nm (hand tight).
– Remove the protective cap of the V203 connection.
– Insert the new, cut to length PA tube into the V203 connection.
– Check if the PA tube has been pushed in until the stop into the V203
connection.
– Check if the PA tube has a tight connection (approx. 20 N).
– Connect the PA tube to the valve.
– Tighten union nuts on the valve hand tight.
– Check that the connection is tight using a leakage indicating spray.
10.2.5 Creeping pressure loss
If the WABCO Display indicates a creeping pressure loss:
– First use leak detection spray to check the connection of the indicated wheel
between valve and sensor.
– If these connections are tight, check bearing surface and edges.
So-called indicators at the tire edges point on damages at the carcass, which
usually causes creeping pressure loss of the wheel.
– If the casing is damaged, replace the tire.