Xantia – Sinking after replacing accumulator sphere

[lancia58]

Hi All

I replaced the accumulator sphere on my none hyderactive Xantia. Before replacing it the regulator ticked each 10 seconds, now the frequent ticks are gone. To check the accumulator I turned off the engine and sat in the trunk. After around 10 seconds the car raised, I could repeat this three times before running the engine again. The problem now is that the car sinks after couple of hours, overnight it looks like the height control lever is set to low position ( where it stays at the ride position ). Any idea why that happens?
Thanks
Zohar

[Stewart(oily)]

Mine was sinking after an acc change and a partial LHM change too, it seems to have settled down after a couple of weeks.

[Hell Razor5543]

Have you done a Citrobics session? There may be a little bit of air in the pipework from the new sphere. Citrobics would help clear that out. Did you also bleed the brakes? The rear brakes get fed off the suspension system (how, I don't know. Witchcraft?) so if the back is light there is very little braking force, but the heavier the back is the more pressure is fed to the rear brakes. I always bleed the brakes if I have done anything to the hydro pneumatics.

[Xaccers]

Did you also replace the rear accumulator (AKA anti sink sphere)?

[Old-Guy]

The rear brakes get fed off the suspension system (how, I don't know. Witchcraft?)

No Witchcraft, simple plumbing: a pipe runs forward from the rear (anti-sink) accumulator to the Doseur valve (separate sections for front and rear circuits) then another goes from the Doseur back to the rear where it 'T's to each calliper. These very long pipe runs mean that to bleed the rear brake circuit properly, you have to take lots of fluid out of it the first calliper (until the LHM is clean and bright green).

so if the back is light there is very little braking force, but the heavier the back is the more pressure is fed to the rear brakes. I always bleed the brakes if I have done anything to the hydro pneumatics.

Good advice.