Cullen,
Compressed air also works great if they are not too frozen and makes
the cleanup even easier. A rag between the two pistons keeps them from
blowing into each other. If one breaks loose first then I put that one back
in barely sealing and use a piece of straight metal in the disc groove in
the caliper to keep it in place until the other side blows out. Both the air
and grease methods prevent damage to the thin groove in the pistons that
holds the dust shield.
Dave McDermott
At 09:17 AM 9/23/97 MST, Bennett, Cullen wrote:
>
>>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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