Brake master cylinder

[Geoff Butcher]

I thought I'd rebuild my old cylinder but I can't get a kit locally. Looking at Ebay, SP7698 appears to be correct, can anyone confirm?

[Hans Efde]

Depends which type you have. There are 2. AP Lockheed or Lucas. These are different, so a Lucas kit won't be any good for refurbishment of an AP Lockheed master cylinder.
Have you found the cause of the leakage?

[Geoff Butcher]

No, this query is separate from the leakage problem. My Haynes manual implies that there is only one m/c for a post-85 car with servo.

[nimdy]

Geoff,
Which master cylinder is it? I have a brand new Lockheed one that I could be persuaded to part with if that would be easier.

Russ

[Geoff Butcher]

This is it


I changed it some time ago but the problem turned out to be the servo. Since this is in good condition I thought I'd treat it to some new seals and keep it as a spare

[Hans Efde]

I suppose then that yours is a Lucas. Mine is an AP Lockheed and looks like this:

master cylinder.jpg (38.65 KiB) Viewed 7545 times

[Geoff Butcher]

Hans, is yours 13/16" bore (20.6mm)? If so, I reckon the seals are the same

[Hans Efde]

No the seals are not the same. I bought a seal kit from Ebay that didn't fit, it was useless. The differences are minute though. I have to find it in the garage to see what's on the box if you're interested.

[Geoff Butcher]

Yes please, Hans - no hurry though!