Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Suspension Strut (Air Suspension)
– Before loosening air line when installed, check, whether air
spring is still filled with a residual pressure of approximately 3
bar.
– Press with thumbs on air spring boot. Boot must demonstrate
noticeable resistance.
– If great resistance is not noticed, air spring is not pressurized
and it must be replaced together with the residual pressure
retaining valve.
♦ Thoroughly clean connecting points and their surrounding
areas before loosening.
♦ To install suspension strut (air suspension), it must be filled
with argon or corgon, refer to
⇒ “4.3 Air Suspension Strut, Filling”, page 65 .
♦ Place removed parts on a clean surface and cover to prevent
contamination. Use foils and paper. Only use lint-free cloths!
♦ Install clean parts only: remove the replacement part from its
packaging just before installing it.
♦ Only use lubricants indicated by part number.
♦ Carefully cover or seal open components, if repairs are not
carried out immediately.
Residual Pressure Retaining Valve
Residual pressure valve my only be replaced if:
♦ if damaged during Removing and Installing or servicing of
suspension strut (air suspension),
♦ residual pressure retaining valve stuck,
♦ gasket is faulty.
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. Wheels must not be compressed with empty boot under
any circumstances!
Seals, Sealing Rings
♦ Always replace gaskets and boot.
♦ After removing seals, check sealing surfaces on housings for
burrs and damage.
Bolts and Nuts
♦ Loosen and tighten the bolts and nuts of covers and housings
in a diagonal sequence.
♦ Torque specifications for unlubricated bolts and nuts are giv‐
en.
Audi Q7 2007 ➤
Suspension, Wheels, Steering - Edition 01.2014
68 Rep. Gr.40 - Front Suspension
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