I highly reccomend puting wood in between the caliper's pistons before blowing
with compressed air. Saves any bad dings that connot be repaired.
Chris
On Tue, 23 Sep 1997, Dave McDermott <Dave.McDermott@cusys.edu> wrote:
> 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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