Ken,
Coincidentally, we met last weekend at the Bay Model meeting and this
week I also had to tackle a recalcitrant control valve piston plug. It
was a challenge, but I was eventually able to shift the plug adequately
to get a putty knife under the edge and free it.
The technique that I found required the use of a couple probes with the
short bent portion of differing lengths and angles. I found that large
common nails (of the specified 1/8" dia.) were appropriate to the task.
I used them in the manner of a pile driver or slide hammer, gradually
advancing the piston/plug over time (several minutes). Simple levering,
as the rebuild kit instructions suggest, produced inadequate results.
After successful disassembly, I found no corrosion present.
Good luck.
Bob
Message: 1
Date: Tue, 21 Jul 2015 17:26:12 -0700 (PDT)
From:goldengt@cal.net
To: healeylist<healeys@autox.team.net>
Subject: [Healeys] brake servo dismantling
Message-ID:<1515411430.3634.1437524772841.JavaMail.zimbra@cal.net>
I have been saving an old BJ8 servo to rebuild for many years. I have gotten
the main bore seals out and it looks ok, but I cannot not get the control valve
piston plug out of the body to get access to the control valve seals. The
instructions say use some stiff wire to push it out, but it isn't budging.
Should I just assume this is an indicator of sufficient corrosion to scrap the
whole unit?Ken Freese65 BJ8
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