XJ6 S1 Brake Master cylinder 2nd Piston Witchcraft!
#1
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Gentlemen
To my surprise my 1973 XJ6 S1 4.2 brake master cylinder had no rust inside the
first piston bore . Even the rubber piston looked "new". I am quite adamant it is
the original master cylinder as it was " welded" onto the brake booster.
Now i note there is offcourse a 2nd piston bore, yet i cant determine the release
mechanism for it. What type of witchcraft is this?
I recall i did this on my s3 brake master cylinder, but this is slightly different in design,
can someone advise on how to release the 2nd piston?
best regards
Peter
To my surprise my 1973 XJ6 S1 4.2 brake master cylinder had no rust inside the
first piston bore . Even the rubber piston looked "new". I am quite adamant it is
the original master cylinder as it was " welded" onto the brake booster.
Now i note there is offcourse a 2nd piston bore, yet i cant determine the release
mechanism for it. What type of witchcraft is this?
I recall i did this on my s3 brake master cylinder, but this is slightly different in design,
can someone advise on how to release the 2nd piston?
best regards
Peter
#2
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I have the answer to my own question:
In the S1 brake master cylinder, the 2nd piston is not pinned in the bore, it will just drop out of the bore once the 1st Piston is removed, give it a good thump on the ground , it is just jammed in there after 50 yrs.
This is a bit different to the S3 brake master cylinder, the 2nd piston has a secret little pin under one of the rubber grommets located under the resouvioir attachment area.
That hidden pin , locks the 2nd piston and needs to be removed to dissemble it fully .
hope some obe finds it all useful
regards
Peter
In the S1 brake master cylinder, the 2nd piston is not pinned in the bore, it will just drop out of the bore once the 1st Piston is removed, give it a good thump on the ground , it is just jammed in there after 50 yrs.
This is a bit different to the S3 brake master cylinder, the 2nd piston has a secret little pin under one of the rubber grommets located under the resouvioir attachment area.
That hidden pin , locks the 2nd piston and needs to be removed to dissemble it fully .
hope some obe finds it all useful
regards
Peter
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my420
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04-23-2021 11:18 AM
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