Xantia front or rear fail to rise fo normal pos.

[Thunderbird]

Xantia 2.0HDi non-hydractive. Six spheres (5 + acc + as).
Operation: Rising from Lower position to normal.
Problem: Sometimes front rises right away, rear doesn't; other times is the rear not to rise.
Additional notes:
- Going to max makes it go fully up.
- Spheres are new.
- LHM was changed recently (no hydraflush was applied).
- 4.5 years; 71.000kms (44.000 miles)
- Exercising from Low to Up and vice-versa was carried out.
- LHM Level is at Max line.
Doubt the problem will be weight correctors, as sometimes front doesn't rise, other times rear. Plus, the one who rises, rises very fast, and the other nerver rises.

[tomsheppard]

Height corrector linkage is always the first place to look. The height correctors can be removed, stripped and cleaned. Links are available to instructions. Before doing this though, give the end of the height corrector a good squirt of oil and see if it can be made to free up. If not, then you'll be stripping them down.