I've yet to see a repro that holds up more than 6 months.
I have both two original Lockheed dual circuit brake MC's I won't be
using if anyone is interested.. One is brass sleeved by Sierra and
another new condition original, both with new, and as yet uninstalled
seal kits. The cylinders have been stored disassembled. I also have a
brass sleeved and new cad plated original lockheed clutch master.
The reason these MC's typically leak has nothing to do with internal
piston seals. The is a seal at the front of the bore to capture bypass
fluid (this is a design feature). The surface of the external piston
must be clean and polished where it passes from the internal fluid
area to the external. Any scores, pits, blemishes, etc, will cause the
MC to leak. Due to the difficulty of disassembling, most people damage
this surface when attempting a rebuild. They will leak even with new
seals if the piston is damaged.
If anyone is interested in either of the two I have, let me know off
list.
Gerard
On Nov 24, 2011, at 11:00 AM, spridgets-request at autox.team.net wrote:
> Message: 2
> Date: Wed, 23 Nov 2011 19:31:29 -0800
> From: "David Riker" <davriker at nwi.net>
> To: <jwagaman1 at comcast.net>, "Spridget" <spridgets at autox.team.net>
> Subject: Re: [Spridgets] Rebuilding master cylinder
> Message-ID: <E72714120D3F4E2893F6A202879C7DFA at RikerPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> October of last year I replaced my master cylinder on my 1974
> Midget. My
> local parts house is a Moss distributor, and so I purchased the
> Classic Gold
> Brake master cylinder. I was assured that, although made in China,
> the
> master cylinders were a pet project of one of the Moss employees,
> and that
> they were painstakingly reproduced to be exactly as original. I was
> told
> that any master cylinder that came back under warranty was being
> disassembled to determine cause of failure, and improve future
> products,
> yada...yada...yada. The master cylinder did in fact look exactly
> like the
> original in every visible detail, and I can now say with authority
> that
> after one year and less than 1000 miles, it leaks fluid EXACTLY the
> way the
> original one did....
>
> They have said I can return it for a new one, but seriously am
> thinking
> about sending a very old core to be rebuilt instead.
> David Riker
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