For those who want to remove it, it sits in top of the MC. In the end of the spring. Last bit that falls out.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Doc is right and just maybe instead of removing it a new kit and check of the mater should be made as the presure required for discs is much greater than drums and any wear or even slightly dodgy seals will soon show up with discs and it might save you the hassle of having to remove the master twice, might even save your life

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Roundies and Clubbies(except vans) are both ugly that is why I have Midas and a van
1293 Mini Midas Bronze,1275 Clubman van

This seal has a hole in the centre of it. Do you really need to remove it?

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A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

YES if you have discs

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Roundies and Clubbies(except vans) are both ugly that is why I have Midas and a van
1293 Mini Midas Bronze,1275 Clubman van

Thanks for all the info. I will get new wheel cylinders and remove seal and see I get on then.
Pete

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A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

If you have just fitted the brakes wait for the to bed in....also did you taje the shine off the pads

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Stop Licking the Dog...I Don't Care Who Started It

What this seal does is restrict the flow back to the MC. But if you have discs this will prevent the seals from flexing the pistons back off the discs properly.
Not good... so pull it out!

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Going to take seal out today. The pads had a rough surface with no shine (brand new from HMG)
Pete

_________________
A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

Took the seal out today, noticed before I did the inside pads on both sides were still hard up against the disk. After taking seal out took it for a run brakes are better ( I think they have bedded in now ) and the inside pads are away from the disk. Am going to put the cooper s wheel cylinders in tomorrow all things going well.
Pete

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A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

glad it is all working out for you, some of the stuff they taught us in the 70s still comes in handy and not much has rally changed in the world of mini's

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Roundies and Clubbies(except vans) are both ugly that is why I have Midas and a van
1293 Mini Midas Bronze,1275 Clubman van

Just thinking on the keyboard.. I wonder do these new MCs with the plastic tanks have that valve in there?
Anybody had a look?

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.