Assembling spring strut
Note. When replacing the air spring, always replace the boot/bellows. If the rolling piston slips out of the outer guide during disassembly, it must be correctly positioned again. When sliding in the rolling piston, the roller must lie evenly between the outer guide and rolling piston (roll fold). Make sure that everything remains absolutely clean. The smallest impurities can cause leakages. Clean the contact surfaces of the sealing rings with a lint-free cloth. Lightly grease sealing rings with Syntheso Glep 1 (ET No. 000.043.204.68).
If the shock absorber is not replaced, the sealing ring must be replaced.
Scheme 29
1. Replace sealing ring on shock absorber -Arrow-. (Scheme 27)
2. Pull boot/bellows completely over the collar of the shock absorber so that it engages (small diameter downward, 2nd worker required).
3. Fit rubber stop (small diameter downward).
Scheme 30
4. Position the air spring on the shock absorber. Grasp the rolling piston and push downward by turning it slightly to the left and right. If the rolling piston has slipped out of the outer guide, it must be pushed back in again while forming a circumferential uniform roll fold on the rolling boot -Arrows-. (Scheme 28)
Scheme 31
5. Clean the surfaces -2- on the mounting saddle and on the air spring with a lint-free cloth. Replace sealing ring -1- on the air spring. (Scheme 29)
Scheme 32
6. Align the air spring so that the residual pressure retaining valve is located close to the imaginary axis of symmetry (approx. 10° off-center) of the air-spring strut.
7. Fit bellows (large diameter up).
8. Fit spring-strut mount with socket wrench insert 3353 and arm bracket P9630.
Scheme 33
9. Fit mounting saddle and while doing so align it so that the upper arm of the bearing points to the residual pressure retaining valve.
10. Fill the air-spring strut. --> 43 01 IN Filling specification for air-spring strut - as of MY 2003 (All Models Except Cayenne S TIO Titan) .