CX Doseur Valve.
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  1. #1
    1000+ Posts gerrypro's Avatar
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    Default CX Doseur Valve.

    Does any one know if there is any difference between an Aussie spec Doseur valve for the diagonally split braking system and a standard doseur for the front rear split system?
    I overhauled a spare the other day and can see a difference in the spring deep in the valve behind the second spool and the spring illustrated in the sectioned drawing from the work shop manual
    I believe I may have fitted the wrong valve inadvertently as my brakes are not as responsive as I remember when driving the car many years ago. The first part of the application of pedal moves easily but becomes much firmer when depressed to activate the second spool in the valve. This indicates that the second spring is firmer.
    However the valve I overhauled has two springs of equal resistance.

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    Cheers Gerry

  2. #2
    1000+ Posts gerrypro's Avatar
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    No answers? Where are you experts?
    Cheers Gerry

  3. #3
    Fellow Frogger! Buttercup's Avatar
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    Mmmmmmmm...... maybe you're exploring new territory...
    its a bit like the response I got when I asked about removing HDI injectors a few weeks ago.

    Now I'm the expert on reassembling said injectors !
    Bob
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  4. #4
    1000+ Posts gerrypro's Avatar
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    Quote Originally Posted by Buttercup View Post
    Mmmmmmmm...... maybe you're exploring new territory...
    its a bit like the response I got when I asked about removing HDI injectors a few weeks ago.

    Now I'm the expert on reassembling said injectors !
    Yes Bob, It looks like I will be re-discovering that which has been forgotten. At the moment I am not looking forward to replacing the valve. It is so buried in an inaccessible corner under the ventilation tower. I think I will wait until I get back from Tassie! I would like to have it at this years Concourse event on April 17 so I guess that I will have to bite the bullet and get cracking.
    Cheers Gerry

  5. #5
    1000+ Posts Greg C's Avatar
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    I have had a quick look in the Technical Bulletins but can see no reference yet. Thinking about it though I doubt the doseur valve is different. All it needs is two circuit feeds, in normal config, one for the front one for the back. I think the Australian setup means the two circuits are diagonal. This would mean there would be two pressure regulators somewhere for the back brakes. Yours has a brake accumulator for each circuit does it not which would add to the thought that the doseur valve is the same, just the feed for both circuits comes from each brake accumulator.

    This might help or if it is bullshit might wake up the experts

    Mind you I have never owned an Aussie spec Grande Exportation CX
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  6. #6
    WRB
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    Hi Jerry,

    You may want to ask the chap at Peliedes... He is sure to know.

    cheers

    Warren

  7. #7
    1000+ Posts gerrypro's Avatar
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    Quote Originally Posted by Greg C View Post
    I have had a quick look in the Technical Bulletins but can see no reference yet. Thinking about it though I doubt the doseur valve is different. All it needs is two circuit feeds, in normal config, one for the front one for the back. I think the Australian setup means the two circuits are diagonal. This would mean there would be two pressure regulators somewhere for the back brakes. Yours has a brake accumulator for each circuit does it not which would add to the thought that the doseur valve is the same, just the feed for both circuits comes from each brake accumulator.

    This might help or if it is bullshit might wake up the experts

    Mind you I have never owned an Aussie spec Grande Exportation CX
    No! I can see definitely that the spring on the second spool valve is a lighter section than that shown in the drawing. This would make sense because then equal effort would allow each half of the circuit to work together rather that the first spool opening and then followed by the second spool once the initial movement made contact with the second spool face.
    Cheers Gerry

  8. #8
    1000+ Posts gerrypro's Avatar
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    Quote Originally Posted by WRB View Post
    Hi Jerry,

    You may want to ask the chap at Peliedes... He is sure to know.

    cheers

    Warren
    Good suggestion Warren!
    PS sorry to hear that you are selling the CX. I would be interested if I had enough space to store it. But Alas-------
    Cheers Gerry

  9. #9
    Fellow Frogger! Rob T's Avatar
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    My recollection is that the split diagonal systems DO have a different valve. It is longer and has an extra 'circuit' to suit. My car definitely had two pressure limiting valves in the rear, one for each circuit.

    I don't think I have any documentation to prove it. So don't take this as an absolute....
    Robert Thorne
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  10. #10
    1000+ Posts gerrypro's Avatar
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    The valve is in the same Body as the European version and has two in and two out high pressure lines as well as two leakage returns. The only difference I can detect is spring strength.
    Cheers Gerry

  11. #11
    WRB
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    I have decided not to sell the CX Jerry...

  12. #12
    1000+ Posts gerrypro's Avatar
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    Quote Originally Posted by WRB View Post
    I have decided not to sell the CX Jerry...
    Excellent News. Good on you Warren!
    Cheers Gerry

  13. #13
    Now go make me a sandwich Hotrodelectric's Avatar
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    Gerry, stupid thought: wouldn't the non-Activa XM and Xantias have the same, or a similar valve? On the flip side, do you need to comply with ADR on an old car? You know- pipe the brakes as a Euro or UK car? Shane imported his car from the UK- it seems the rules would be the same for you.

    Praise Jesus you don't need to meet California emissions regs!
    The measure of your character isn't what you do when people are watching- it's what you do when they aren't watching.

  14. #14
    1000+ Posts gerrypro's Avatar
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    No it is much easier to put back the correct valve and leave all of the plumbing the way it is intended for an Aussie spec car.
    Cheers Gerry

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