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  1. #1
    Legendary Lancista Fulvia-hf's Avatar
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    bleeding Appia brakes

    Good evening,

    I have helped a friend with the replacement of the brake master cilinder of his Appia S2. It is a brand new unit. Everything fits well but bleeding the system has not been successful. The plungers can be pulled up and stay up. When the bleed nipple is opened they sink. Like they should I assume. However the standard (Fulvia) way of bleeding does not seem to apply.

    Any tips?

    kind regards,

    William

  2. #2
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    Re: bleeding Appia brakes

    I haven't done this on an Appia in years, but it seems to me it was very simple. First, a question:

    You mention the "plungers". A series II Appia should have a "Simplex" braking system with one plunger on the metal tank, and one metal fluid line connecting the tank to the master cylinder. Correct?

    A series III Appia should have a "Duplex" braking system with a plunger on a plastic tank, and two metal fluid lines connecting the tank to the master cylinder.

    As you describe, the plunger should stay up when lifted on both types, and go down when the system is bled, either at the master cylinder or at the wheel cylinders. The brakes can also be bled in the old traditional manner by depressing the pedal with the bleeders open, one at a time.

    Hopefully you are not attempting to bleed the brakes by using the plungers on the tank for oiling the suspension pillars!

    And hopefully you are using the correct fluid type (vegetable base, NOT mineral base or silicone).

    Seems like I read many years ago about a Datsun master cylinder that could be used on Appias. Where in the world could one find a new original equipment SABIF master cylinder for an Appia? The old ones can be sleeved, I suppose, but you will certainly have problems if it isn't done correctly.

  3. #3
    Legendary Lancista bmarler's Avatar
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    Re: bleeding Appia brakes

    appia brakes are very simple really. and the plunger makes it easy to bleed with only one person. first though, when replacing the master it should be bled before installation. you will lose some fluid when installing but it makes it a whole lot easier to get the system free of air. after hooking up the reservoir you should re- bleed the master before moving to the wheels. i've bled them using gravity alone (hook some tubing to the open bleeder and wait)as a first step and finished with the plunger when by myself, or using an assistant on the pedal. both ways work well.
    what exactly is the problem?
    bmarler/
    1967 fulvia sport zagato
    1961 appia vignale convert.

  4. #4
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    Re: bleeding Appia brakes

    [QUOTE=bmarler;79711]appia brakes are very simple really. and the plunger makes it easy to bleed with only one person. first though, when replacing the master it should be bled before installation. you will lose some fluid when installing but it makes it a whole lot easier to get the system free of air. after hooking up the reservoir you should re- bleed the master before moving to the wheels. i've bled them using gravity alone (hook some tubing to the open bleeder and wait)as a first step and finished with the plunger when by myself, or using an assistant on the pedal. both ways work well.
    what exactly is the problem?[/QUOTE

    ....always best to bench bleed masters...…..Bo Danenberger

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