Hydraulic Pipe End Fitting
Moderator: RichardW
Hydraulic Pipe End Fitting
Xantia 1.9TD 1999
Hi.
Just replacing split hydraulic pipe between hydraulic pump and hydraulic pressure regulator. (Haynes P.9.2 drg.2.1 and 3.8 refers)Believe that it is the high pressure pipe not the return pipe and am finding it impossible to stop it leaking at the regulator end. Am now wondering if it should have a rubber seal (drg. 3.8)even though one didnt emerge when removing the old pipe. Stuck at the moment so any advise would be much appreciated.
Cheers Ian
Hi.
Just replacing split hydraulic pipe between hydraulic pump and hydraulic pressure regulator. (Haynes P.9.2 drg.2.1 and 3.8 refers)Believe that it is the high pressure pipe not the return pipe and am finding it impossible to stop it leaking at the regulator end. Am now wondering if it should have a rubber seal (drg. 3.8)even though one didnt emerge when removing the old pipe. Stuck at the moment so any advise would be much appreciated.
Cheers Ian
Must be a seal there allright.
The pipe is a 6.3mm - get a pipe seal at your nearest GSF or Cit dealer for a couple of pennies.
Remember :
ALWAYS fit the LHM wetted seal on the pipe end - and THEN fit both in the pipe port.
There is a fair chance the old seal is still located - and penetrated (damaged) - in the regulator port. The seal is damaged by the sharp pipe end when inserted before the pipe.
When the seal is working OK you only have to nip up firmly - NEVER torque - the pipe union.
Take care to fine-shape the pipe run such the pipe enters the pipeport extremely squarely.
The pipe is a 6.3mm - get a pipe seal at your nearest GSF or Cit dealer for a couple of pennies.
Remember :
ALWAYS fit the LHM wetted seal on the pipe end - and THEN fit both in the pipe port.
There is a fair chance the old seal is still located - and penetrated (damaged) - in the regulator port. The seal is damaged by the sharp pipe end when inserted before the pipe.
When the seal is working OK you only have to nip up firmly - NEVER torque - the pipe union.
Take care to fine-shape the pipe run such the pipe enters the pipeport extremely squarely.
Yes all high pressure pipes use the same type of seal - a rubberlike cylinder (looks like a bit of cut off tube!
my guess is that your old one is still in there - they can be very difficult to get out especially if they have been in there for a long time and have done what they are supposed to do which is expand. When you get it out you will probably find it looks as though it has threads cut into it.
I use a bit of strongish wire or whatever similar with the end bent in the form of a barb. The ideal is to push it into the hole in the seal so that it goes right through and the barb latches into the seal - then give it a good pull and the seal should come out - easier than digging away with a screwdriver.
jeremy
my guess is that your old one is still in there - they can be very difficult to get out especially if they have been in there for a long time and have done what they are supposed to do which is expand. When you get it out you will probably find it looks as though it has threads cut into it.
I use a bit of strongish wire or whatever similar with the end bent in the form of a barb. The ideal is to push it into the hole in the seal so that it goes right through and the barb latches into the seal - then give it a good pull and the seal should come out - easier than digging away with a screwdriver.
jeremy
http://www.rwbsmith.plus.com/citroen2/H ... aulics.pdf
bottom page 9 in this document shows a typical Citroen hydraulic pipe connection in schematic form.
The situation shown is a bit exaggerated to clarify the situation. At "c" the pipe end is forced into the bore with it's original diameter. Right before here you can see the pipe end expanded a wee bit - surrounded by the compressed seal.
It must be the old pipe end you have got out then ? Any O-ring is wrong here. It must be a tubular seal.
BTW : it just springs to mind. Are we talking the same thing when you say "regulator" ? This is the device shown top of page 9 in above document.
bottom page 9 in this document shows a typical Citroen hydraulic pipe connection in schematic form.
The situation shown is a bit exaggerated to clarify the situation. At "c" the pipe end is forced into the bore with it's original diameter. Right before here you can see the pipe end expanded a wee bit - surrounded by the compressed seal.
It must be the old pipe end you have got out then ? Any O-ring is wrong here. It must be a tubular seal.
BTW : it just springs to mind. Are we talking the same thing when you say "regulator" ? This is the device shown top of page 9 in above document.
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