[Mgs] Advice wanted on MGB Brake Master Cylinder

The Roxter rocknatural at gmail.com
Wed Aug 22 16:28:21 MDT 2007


Councill, David wrote:
> I have done several master cylinders. The one presently in my 72B I have
> owned for 25 years (was previously in my 71 BGT) and I have rebuilt it
> three times over those years.
>
> I am not sure about documenting it because it is hard to picture the
> inside of the bore. But as far as the delrin spacer, I have ended up
> destroying it to get it out but it comes with a replacement in the
> master cylinder rebuild kit. I recall cutting it with a small, sharp
> edged flat screwdriver to get it out. But once you get past that
> obstacle, Kelvin mentions the next dreaded step - the clip. It's a bit
> tricky to get the clip ring pressed (due to being deep in the bore) so
> it comes out of its groove.
>
> It's a tough job the first time you do one, but after that you know what
> you face and you get a bit better at getting the spacer and the clip
> out. Then there is always the chance that once you get it apart, you
> realize that the bore has corrosion or rough spots. Then you would have
> to end up buying a new master cylinder anyway and all that time would be
> wasted.
>
> Otherwise, besides the spacer and the snap ring, its pretty straight
> forward.
Does anybody have an exploded view of this MC or the instructions for its disassembly and can post it to me as an attachment (or a web address for same?).

I have a manual somewhere, but haven't been able to find it yet.

-The Roxter
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