Many thanks Gerry, this is a great rundown of the setup and it's function. Reading this, it seems my main regulating valve must be faulty since it is not possible to lower the suspension by moving the lever on the main valve to any position at all. (I can lower it by draining fluid from the accumulators) But when I restart the engine it will go up to max. hight again, I guess only the shocks stop it for going all the way to heaven. Any thoughts on that?? Once again thanks for your time.
cheers
Tony

PS
The diagrams would be handy.