Audi Q7 2007 - 5.5 Crossmember, Removing and Installing

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– Align air spring again so that residual pressure retaining valve
-1- is located near imaginary symmetrical axis -arrow- on sus‐
pension strut (air suspension).
– Residual pressure retaining valve -1- points in opposite direc‐
tion of Rear Dampening Adjustment Valve -2-.
– Submerge suspension strut (air suspension) completely in a
water bath to check for leaks.
If there are no bubbles in the water, suspension strut (air sus‐
pension) does not leak and can be reinstalled in the vehicle.
If bubbles form in water from suspension strut (air suspension), it
must be disassembled again and gaskets must be replaced.
Note
Before installing suspension strut (air suspension), blow out all
connectors and residual pressure retaining valve with com‐
pressed air to dry them.
Tightening specifications, refer to
⇒ “4.6 Air Suspension Strut Overview”, page 152 .
4.8 Residual Pressure Retaining Valve, Re‐
moving and Installing
Special tools and workshop equipment required
♦ Pressure Retention Socket - T10158/1-
♦ Air Line Insert Tool - T10212-
Note
♦ Residual pressure retaining valve must only be replaced if it
was damaged during Removing and Installing or servicing of
suspension strut (air suspension) or if air is not released from
it anymore (it sticks).
♦ With suspension strut (air suspension) removed, no further
preparation is needed to replace residual pressure retaining
valve.
WARNING
♦ If residual pressure retaining valve sticks, the vehicle must
be on a hoist and the wheels must rotate freely in order to
replace the valve.
♦ When removing air line, there is the possibility that the re‐
sidual pressure retaining valve will also be removed.
♦ If vehicle is not raised with a hoist, vehicle sinks immedi‐
ately on side where residual pressure retaining valve was
removed. There is a strong risk of injury because the arms
are clamped.
♦ Vehicle must remain on hoist until a new residual pressure
retaining valve is installed and suspension strut (air sus‐
pension) is refilled.
Audi Q7 2007 ➤
Suspension, Wheels, Steering - Edition 01.2014
4. Air Suspension Strut and Crossmember 159