Question about 1990 Mazda 323

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1990 Ford Laser/Mazda 323 GTX with 3-channel Nisshimbo ABS

Can you please advise how to remove piston from the bottom of master cylinder. I am trying to rekit due to air in brake fluid.

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  • fishhead4040 Jul 28, 2008

    Problem is piston the appears to be stopping mechanically. This is typical in most master cylinders, however we have x-rayed master cylinder and found no conclusive stop or pin. There are three ports (closed off with pressed ball) to a location we think a pin should be......

  • fishhead4040 Jul 28, 2008

    Yes compressed air did the trick!! Good advice I should have tried first.

    The mechanical stop was just the shaft that stops spring travel in the piston assembly.

    Bores and seals all OK, however I did find an oring that could be responsible for air ingression - the damage looks to be from intial assembly.

    No need to destory my spare unit now.

    Thank you.



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Compressed air should do it. Don't shoot yourself in the eye while attempting this. (Don't laugh, it happens a LOT)...accordianman

Posted on Jul 28, 2008

  • Michael Borelli Jul 28, 2008

    This is one of those plastic assemblies, right? Well, what happens is that the seal on the plunger wears the bore to the point that you have a "ridge" that needs to be overcome to get the bugger out. Might try a rebuilt; The're not that much more expensive and saves Time...accordianman



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