If the rear brake cylinder contained a 'tank' like the front calipers do
when the pistons are partially extended you would be correct. But at rest
the pistons in the rear cylinders are 'back to back' with just a small
chamfer on the periphery of each one, so internally the cylinder represents
little more than a pipe, and we have no problem (relatively) bleeding down
from the m/c at the top of the bonnet to the calipers/cylinders near the
floor.
My two-penn'orth.
PaulH.
http://freespace.virgin.net/paul.hunt1/
-----Original Message-----
From: Max Heim <mvheim@studiolimage.com>
To: MG List <mgs@autox.team.net>
Date: 06 April 1999 02:42
Subject: Rear brake cylinders
>Continuing the recent theme of brake questions...
>
>How are you supposed to bleed the rear brakes (66 B) when the bleed screw
>is below the level of the brake line? The air just seems to stay trapped.
>Took it to a shop (for once) and they couldn't improve the pedal a bit.
>Still takes a triple-pump or it goes (slowly) to the floor.
>
>It occurs to me that perhaps the cylinders are installed upside-down...
>is this possible? None of the illustrations I can find (Bentley, Haynes,
>Moss) actually show the bleed side of the backplate, or even of the
>cylinder. I know there's a locating pin -- what I don't know is the
>left/right symmetry of the backplates (it's raining so I'm not taking a
>look right now).
>
>BTW the m/c was just rebuilt and the hoses replaced. TIA
>
>--
>
>Max Heim
>'66 MGB GHN3L76149
>Runs great,
>looks particularly bad since some SUV clown backed into it.
>If you're near Mountain View, CA,
>it's the red one with the silver bootlid.
>
>
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