xm suspension

crooser · Unread post by **crooser** » 10 Apr 2004, 01:03

i've just replaced the rear hc after servicing it and now i've got the height wrong on a 95 xm estate.my starter for ten is this.if the hc position is set wrong [10 cm too high at rear],can this in itself cause a hard ride at the rear?

AndersDK · Unread post by **AndersDK** » 10 Apr 2004, 03:08

YES -
Wrong height setting causes hard suspension.
You have 2 adjustments on the HC :
1) the auto levelling, which is the linkage from the rollbar. This is adjusted while the manual (below) is set to be sure not to interfere the height setting.
2) the manual heigh setting, which is the linkage from the cabin height control setting. This would involve a small bracket with a longhole, and this bracket must be loose fit not to interfere when adjusting the auto levelling. Once the auto level adjustment is right, you adjust & fasten the small bracket to get the hooked link mid to it's longhole.

crooser · Unread post by **crooser** » 10 Apr 2004, 04:19

clear Anders-thankyou.

xm-2.5td · Unread post by **xm-2.5td** » 10 Apr 2004, 15:17

Talking about suspension…
I just had change all spheres on my ’97 2.5 TD XM but…the front seams to be still too hard. Rear is so soft, it’s just wonderful…but from is significantly harder.
Just for the record, normal/sport mode works just fine, no other problems with suspesion.
Any ideas guys?
Thanks in advance
I.

alexx · Unread post by **alexx** » 10 Apr 2004, 17:06

Front should be about twice harder than rear, because of approx 2/3:1/3 weight distribution

xm-2.5td · Unread post by **xm-2.5td** » 11 Apr 2004, 13:07

Guys,
Since we're talking about spheres...let me ask you..
A month ago, I went to Citroen garage for maintenance of my XM 2.5 TD '97...and told him that I need to change all of spheres as well as LHM and couple of other things.
Now, I do have hydroactiv II and switch normal/sport which works just fine....but...they have found and changed only 6 spheres.
Here comes a question:
Can someone, anyone tell me/confirm me how many spheres has Hydroactiv II system???
All the articles I found on internet and some books told me there are only 6 but...can you really confirm me this???
Thanks in advance
I.

NiSk · Unread post by **NiSk** » 11 Apr 2004, 13:19

An XM can have up to 8 spheres if it has diravi steering, see link: http://citroeny.cz/servis/xmser/Hydractive_DIRAVI_2.gif
or 7 if it has dirass steering:
http://citroeny.cz/servis/xmser/Hydractive_DIRASS.gif
//NiSk

xm-2.5td · Unread post by **xm-2.5td** » 11 Apr 2004, 15:32

NiSk, I know what is Diravi since I had it on my last CX 2.5 GTi, but Dirass...I have no idea.
Can you give me more details on it please.
Thanks in advance
I.

AndersDK · Unread post by **AndersDK** » 11 Apr 2004, 16:27

Dirass is the "standard" servo steering, as found first of on the BX model range. The Dirass has been further developed on later ('95->) XM & Xantia's to exclude the problematic FDV, by incorporating the double output (2port) HP pump.
As for spheres on your XM, the Hydactive model would have at least 7 spheres :
4 wheel spheres
2 HA spheres (1 pr axle)
1 main accumulator sphere
If your XM also has Anti-sink system, then it totals 8 spheres in all, this separate anti-sink sphere located under the rear of car.
A simple way to find out is looking under the rear of car :
1) HA sphere would have 2 large dia (10mm) rigid pipes, and 3 other pipes connected to the sphere base (the HA valve block)
2) Antisink sphere would only have a single small standard 3.5mm dia pipe connected to the sphere base.
3) in engine bay you have the wellknown main accumulator sphere fitted on the PR unit, located on engine block. The front HA sphere would be located separately on the chassis body down there in engine bay, and would also carry the special large dia rigid HA pipes.
The Diravi steering was never fitted on RHD export XM models. It's only found on LHD V6 models upto modelyear '96. From then on the reputed Citroen Diravi steering was discontinued on all Citroen models, only having a life of approx 26y's in SM, CX & LHD V6 XM.
It appears then, that Central Europe LHD XM V6 models may have up to 9 spheres fitted in total.
As a curiosity, the US & Australian exported CX'es had 7 spheres in total, as these national legislations required 2 accumulator spheres for the brakes circuit (the main accumulator on CX is for the Diravi).
Some Citroen utility vehicles (small lorry) also had 2 brake accumulator spheres, being the only spheres fitted, as these vehicles did not have hydropneumatic suspension.

alexx · Unread post by **alexx** » 11 Apr 2004, 16:58

As reported from member of our local forum, his XM V6 (12 valve, but new V6 engine type, LHD) '97 has Diravi, but no anti-sink, so it has 8 spheres

xm-2.5td · Unread post by **xm-2.5td** » 11 Apr 2004, 17:43

Thanks AndersDK and Alexx...but now I'm worried that maybe the put incorrect spheres on my car. What is possibility of that? And is there any chance I can check that out myself?!

AndersDK · Unread post by **AndersDK** » 11 Apr 2004, 18:03

Well -
If you had non-HA wheel spheres fitted, then your car would definately feels too soft & "swampy".
This is because the HA-spheres has a harder damping, than standard spheres, and the HA system has the extra HA sphere connected in soft mode ...
Have you tried the Citaerobics ?

xm-2.5td · Unread post by **xm-2.5td** » 12 Apr 2004, 10:57

To be honest, after they have changed spheres on my car....I drove it for about 800 km and the car was floating; I didn't feel any thing wrong with it.
Rear suspension is so soft...I couldn't believe it. Feel's so nice...but the front is a bit harder.
As you guys told me, that's quite normal since the from part is much heavier.
I n ‘sport’ mode car is much stiffer as it should be.
So I guess, there is nothing to worry about?

xm-2.5td · Unread post by **xm-2.5td** » 30 May 2004, 12:29

Okay, so here is another one

As I suspected, there is something wrong on my car.
In the morning, when I start it…works fine for a while. It’s really nice and soft…magical carpet ride…but after while, during driving, it gets significantly harder.
I know that during fast driving computer is switching between normal and sport mode, but I’m talking here about urban driving, in-town.
Speed limit is 60km/h so I’m driving around 80, not to mention rush hour.
So, anybody has any explanation why my car goes into “hard” mode all of the sudden?
Thanks in advance.
I.H.
P.S.
I managed to solve problem with speed. Remember I could not go over 150km/h on highway? Well, in case somebody has a same problem, the guilty one was a – speed sensor (at least they’ve told me it’s called that way).
It’s right under the bonnet and it was broken and disconnected from the pipe getting the pressure from turbo for measuring. Now car goes over 200 with no problem