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Stuck Brake Piston Removal

To: "'tigers'" <tigers@autox.team.net>
Subject: Stuck Brake Piston Removal
From: "Bennett, Cullen" <p21988@gegpo8.geg.mot.com>
Date: Tue, 23 Sep 97 09:17:00 MST
>The pistons where stuck in their bores because the inner seals had melted 
and glued >themselves to the pistons.  Put with a little care my wife and I 
were able to get them >out okay.  I used a thin bladed srewdriver inserted 
in the dust seal grove, and a >wooden dowel against the body of the caliper 
as the fulcrum.  It took a while, prying a >little on each side, but it 
finally worked and we were able to free the pistons.
>   Armand Ritchie  B9470219

Armand,
Now that its too late to help this time, I'll impart a little trick that I 
found a while back to get stuck brake pistons out without any danger of a 
single scratch on anything. Take a spare brake bleed valve ( the little 
round nosed thing that you loosen to bleed the brakes) and carefully file it 
down to dimensionally match a grease zerc. Remove the existing valve from 
the brake caliper assembly and replace it with the new fitting. Next, put 
your old trusty hand pump grease gun on the fitting and start pumping. It 
may take upwards of a 1/4 cup of grease, but I have never found a piston 
that it will not break free, regardless of how bad it is stuck. There is no 
substitute for brute force (several thousand PSI). Cleanup is easy with a 
little gasoline or kerosene, followed by standard brake cleaning solution.

Best Regards,
Cullen Bennett in Tempe AZ (B9472658)


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