Hydraulic valves repair

[mark_l]

Hi, everybody!
Did anybody try to repair any valves?
Is it "restricted"?
I have technical skills, but no experience with Citro's hydraulic.
I have a slight wetness on anti-sink valve-O-ring suspected.
May I try to do it myself or I must pay for a new valve {appr $180!} as garages recommend?
Any hints are appreciated.
Thanks ahead
[:p]

[Dave Burns]

Get one from a breakers yard, these valves are very reliable if dirt is kept out of them, very unusual for one to leak.
Dave