XM hydraulics help!
Moderator: RichardW
Posted - 13 Jul 2005 : 00:16:57
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I would have expected the cycling frequency to have slowed when the car was raised to full height.
Clearly the accumulator is not holding anything. Generally this means that the sphere is flat but as the frequency didn't slow when the car was raised it suggests an internal leakage somewhere, probably from the regulator non-return valve. This is found on the face under the sphere on the regulator and is simply a ball bearing retained by a metal plate and a bolt. The bearing can be re-seated by striking it smartly with a brass punch and re-assembing. Steel must NOT be used as it will put a flat on the ball. My own BX went fron cycling every 8 seconds or so to so long that I can't be bothered to measure it and I did it about 3 years ago.
Before doing that job its worth having a look in the reservoir to seee if its likely that air is getting into the system (milky looking in places?) (The system doesn't have seals and relies on surface tension. Air doesn't have surface tension and so the valves and things can act like an air sieve if you get what I mean.)
jeremy
This is not a recognised repair - regulators are considered unserviceable by most mechanisc. Its just that on many its this valve that fails and is simply repairable - BX TD ones can be done without removing anything more than the sphere (ie with the regulator in the car) and removing a regulator is generally a pig of a job as you can't get at it easily - I use a 2 ft 3/8 in extension bar to get the bolts out)
By the way has anyone worked on the hydraulics recently? Just possible the pressure relief bolt has not been tightened - does NOT need excessive force)
Full details and good diagrams here
http://citroen2.triger.com.pl/kc/pdf/citguide.pdf
jeremy
--------------------------------------------------------------------------------
I would have expected the cycling frequency to have slowed when the car was raised to full height.
Clearly the accumulator is not holding anything. Generally this means that the sphere is flat but as the frequency didn't slow when the car was raised it suggests an internal leakage somewhere, probably from the regulator non-return valve. This is found on the face under the sphere on the regulator and is simply a ball bearing retained by a metal plate and a bolt. The bearing can be re-seated by striking it smartly with a brass punch and re-assembing. Steel must NOT be used as it will put a flat on the ball. My own BX went fron cycling every 8 seconds or so to so long that I can't be bothered to measure it and I did it about 3 years ago.
Before doing that job its worth having a look in the reservoir to seee if its likely that air is getting into the system (milky looking in places?) (The system doesn't have seals and relies on surface tension. Air doesn't have surface tension and so the valves and things can act like an air sieve if you get what I mean.)
jeremy
This is not a recognised repair - regulators are considered unserviceable by most mechanisc. Its just that on many its this valve that fails and is simply repairable - BX TD ones can be done without removing anything more than the sphere (ie with the regulator in the car) and removing a regulator is generally a pig of a job as you can't get at it easily - I use a 2 ft 3/8 in extension bar to get the bolts out)
By the way has anyone worked on the hydraulics recently? Just possible the pressure relief bolt has not been tightened - does NOT need excessive force)
Full details and good diagrams here
http://citroen2.triger.com.pl/kc/pdf/citguide.pdf
jeremy