[Mgs] MGA Master Cylinder rebuild

mgbob at juno.com mgbob at juno.com
Mon May 4 13:05:46 MDT 2015

 Astronomers frequently see those primary piston cups in low earth orbit, accompanied by MGB rear brake cylinder circlips.  I know of no trick that will ease them onto the piston. Perhaps a soaking in the fluid for 24 hours would help. Good luck.Bob

---------- Original Message ----------
From: "Robert J. Guinness via Mgs" <mgs at autox.team.net>
To: MG List <mgs at autox.team.net>
Subject: [Mgs] MGA Master Cylinder rebuild
Date: Mon, 04 May 2015 09:43:03 -0500

I am having a heck of a time getting the primary piston cup onto the master cylinder piston on my MGA 1600 with a "high-hat" Lockheed master cylinder.  I have soaked the cup in brake fluid and lubed the piston in brake fluid as well.  I even tried stretching the piston cup with long nose pliers.  No luck.  I did get one on after an hour or so of hit an miss trying.  The clutch side is proving more problematic. Does anyone have some helpful tricks of the trade?
 (Anyone want to know how far a primary piston cup will fly when shot off a piston, or how bruised the end of a person's thumbs can get?)
   Robert Guinness
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