rear brake pressure regulator on 405 estate

Discussion in 'Peugeot 405' started by caveman_si, Apr 9, 2005.

  1. caveman_si

    caveman_si Guest

    I need a spring for a rear brake pressure regulator for 405 estate (m
    reg). (with abs if that makes a difference)

    I just want the spring not the whole unit as the nice man from peugeot
    says it £73 +vat

    I have been reliably informed that there is a comparable spring on a
    citroen but no idea which one. And id be happy for one of those too.

    does anyone know where i can get a new one cheap??? i dont fancy
    climbing round the scrapy in this weather.

    cheers si
     
    caveman_si, Apr 9, 2005
    #1
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  2. caveman_si

    R Guest

    I need a spring for a rear brake pressure regulator for 405 estate (m
    reg). (with abs if that makes a difference)

    I just want the spring not the whole unit as the nice man from peugeot
    says it £73 +vat

    I have been reliably informed that there is a comparable spring on a
    citroen but no idea which one. And id be happy for one of those too.

    The 405 shares it's floorpan with the BX, but that doesn't have a rear
    regulator, using it's hydraulic, (olio-pneumatic?) rear suspension pressure
    to do the same job.

    I'd cruise the scrap-yards looking for one on a 405 estate, as the saloon
    may have a different loading.
     
    R, Apr 11, 2005
    #2
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  3. caveman_si

    Nigel Guest

    They were only fitted to estates. ABS made no difference. I had the
    same problem on my old 405 a couple of years ago. Went to the scrappy
    and got one for nothing--so to speak!!
     
    Nigel, Apr 11, 2005
    #3
  4. caveman_si

    caveman_si Guest

    cheers guys just didnt fancy the day at the scrappy but looks like its
    only way.

    ON another note does anyone know what the rear brake pressure regulator
    actually does? To me it looks like it connects the suspension to the
    abs braking system but no idea why?

    cheers simon
     
    caveman_si, Apr 13, 2005
    #4
  5. The rear brake pressure regulator is there to adjust the amount of braking
    effort applied to the rear brakes depending on the load the vehicle is
    carrying.
    The purpose of the spring is to apply the force to move the regulator valve.
    Once the valve has moved further movement of the suspension could cause the
    link to snap if it was just a rod hence a spring. You can use any spring
    that is the length to just be in tension between the unit and the suspension
    under no load and of the same gauge. It is possible to braze a piece of wire
    on the replace the broken part of the spring. This is usually the hook at
    the suspension end. You could try going to your friendly Peugeot spares
    dealer and asking to measure the spring. I guess this is not possible as
    most parts for Peugeots seem to be special order these days. The 406 is also
    fitted with a similar device.

    Mike
     
    MICHAEL ROCHE, Apr 13, 2005
    #5
  6. Hi

    What is basicly does is control the amount of braking force to the rear
    wheels depending on the load on the rear suspension.

    If the boot is empty then the rear of the car will be lighter & the rear
    wheels will be more prone to locking, When the suspension at the rear rises
    because the front has dropped as the brakes are slammed on the valve
    reduces the flow of brake fluid to the rear & helps stop the wheels locking
    up.

    If the boot is loaded up with stuff then the rear of the car will be lower,
    The valve will now let more fluid flow to the rear wheels because theres
    more weight over the back wheels & theres less chance of them locking.

    Hope that helps explain things clearer.
     
    Lee Power via CarKB.com, Apr 13, 2005
    #6
  7. caveman_si

    Nigel Guest

    It has nothing to do with the ABS as such. It regulates the amount of
    pressure needed to work the back brakes in accordance with the amount
    of load in the back of the car. The more load in the back the more
    "power" to the rear brakes.
     
    Nigel, Apr 13, 2005
    #7
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