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Stuck master cylinder pistons...
chrsgrain - 2/12/08 at 07:01 PM

Hi all, as some of you may know, the current project is a restoration.... a TR4...

Just wondered if anyone has any clever suggestions for a problem with my clutch and brake master cylinders... the plungers are stuck and won't come out.... I can force them into the cylinder, but that has obviously made the whole thing worse... I think they're stuck with brake fluid residue and possibly some ali corrosion... any ideas how to get them out?? Other thing is that - if they are that bad, should they be replaced anyway?

Thanks

Chris


britishtrident - 2/12/08 at 07:08 PM

Girling cylinders quite normal for them to stick

Lubricate the bores with brake flud working in by pushing the piston in a couple of times then allow surplus to drain off then very low pressure compressed air no more than about 15 psi -- blow piston out into a thick cloth wrapped over the end --- don't point the business end of the cylinder it at yourself or anything of value. And beware splashes of brake fluid -- protect your eyes and paintwork.


clairetoo - 3/12/08 at 09:50 AM

I wouldnt even think about using them - they dont cost the earth to replace , and you really dont want them to fail later


02GF74 - 3/12/08 at 09:52 AM

he he he ; I had this on a sierra master.

Now this one had a hollow in the end in which the push rod fitted.

I got it out using one of these: