This refers to my 1.9TD Citroen Xantia Mk2, 1997 with 140K on the clock with a rebuilt AL4 which is throwing intermittent snow flakes when it goes into limp home mode, but this clears after restarting the car. I have gone out and acquired a Lexia3 with a view to having a crack at the AL4 hydraulic block's electrovalve replacement. It has so far revealed that this AL4 box has intermittent pressure regulation fault, oil wear count is at about 15000 which is half the maximum before fluid needs a change, but I will change the oil none the less with the approved Esso variety which Citrojim has mentioned frequently.
After searching this forum on this valve replacement it has given me enough confidence to go for it. There is only one word of advice given by "addo" in AL4 rough 1st gear to 2nd gear shifting
http://www.frenchcarforum.co.uk/forum/v ... =al4+rough which is holding me back, this refers to shuttle valve groove indexing which I have been unable to visualise or fathom what he is referring to. Peugeot also mention on one of their pages http://www.peugeotlogic.com/workshop/ws ... lenoid.htm but they call it Manual valve index spring are these one and the same thing. They also fail to show what this manul indexing spring looks like. Does any one have a drawing or picture of the shuttle valve being mentioned.
While searching for AL4 related information on the web I came across this http://s885.photobucket.com/albums/ac53 ... L4_vid.mp4 which some forum members may find useful, it is a video introducing the AL4 box and seems to be aimed at citroen engineers.
I would love to connect the Lexia and take the car for a drive and capture live data as it comes through in the display window but I have no way of capturing this data which would be ideal for reviewing pressures figures when the fault happens resulting in flashing snow flakes on the instrument panel. My Lexia is connected to an Apple Macbookpro in dual boot mode runing windows xp in emulation, making Lexia think it is talking to a pc. If any one knows of an application on pc or mac which can capture the Lexia data window that will be most kind.
Any advice will be appreciated.
Thank you
Masood ILYAS