WABCO OptiTire System Description page 38

Installation
Assembly of the PA tube
38
CAUTION
Increased wear due to incorrect installation
With tubes that rest on the edge of enclosures, there
is an increased wear due to vibrations. This might
lead to leakages.
– Hold the PA tube with the connection to the tire valve.
– Hold the other end of the PA tube to the external sensor.
– Mark the position on the tube where the PA tube sits flush with the edge of
the external sensor (e.g. using adhesive tape).
– Cut the PA tube (WABCO part number: 960 731 800 0 bis 960 731 802 0) to
the required length if necessary.
Also consider that the PA tube disappears to 20 mm in the connection. For
this purpose, the PA tube should be cut 20 mm behind the marking.
Use a suitable right-angled cutting tool, such as those that are also used for
shortening plastic brake lines.
Tube cutting tool for
ø 4 to ø 12
– Mount the connecting tube to external sensor by inserting the end of the PA
tube into the external sensor opening.
Ö After pressing with force, the PA tube is locked in position and can then
only be removed again after unscrewing the brass screw connection
(WABCO part number: 893 770 005 2).
– Using the marking, check if the PA tube has been pushed in until the stop.
– Pull on the PA tube to check if the PA tube has been inserted with a tight
connection (approx. 20 N).
– Connect the PA tube to the tire valve.
– Tighten union nuts on the tire valve hand-tight.
– PA tubes need to be installed such that they
neither exercise tensile or compressive stress on
connections nor rest on the rim.
– Avoid excess lengths to prevent undesired
vibrations.
– Avoid moisture in the PA tube or at the pressure
port of the external sensor.
Tube cutting tool for
ø 4 to ø 22