I changed my master cylinder yesterday on my 66 deluxe due to it leaking onto the pedals.
I re kitted a tin can type which I had on my 76 clubman and now the pedal goes to the floor and pumping it makes no difference.
I did bleed the system using a bleed kit connected to a spare tyre and adjusted all the drums when finished.

Note. the brakes worked fine except for the leak before

What have i done wrong

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1966 mustang coupe 289 auto
1970 mgb roadster auto
1970 cooper S mk2
1976 mini S
1964 wolseley 24/80
http://s160.photobucket.com/albums/t173/1966mini/

If the 76 Clubman master cylinder was also shagged...then there was probably little point in putting a rubber kit through it.

A check of the M/C bore is in order

However, assuming the bore is reasonable, sounds like you may not be bleeding the M/C and then the system correctly to me...you should have got some sort of pedal (assuming you correctly fitted the kit).

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"Show me the Mini!"

You will need to "UN_ADJUST" the front brakes first,,, then bleed the system, then adjust up all the brakes

otherwise air gets caught in the tops of the front cyls, those pistons need to come back to there starting point to allow the air to escape from that area.

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Before you remove the MC, fit a bleed nipple (if you have a spare one) to the top of the MC and bleed it (you will need an assistant). If you achieve "pedal", your MC is obviously ok and there's air elsewhwere, most like in the wheel cylinders as mentioned above.

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1967 Cooper S - new front bearings to do.
1965 Cooper S shell - Slow progress. No time or money!
1966 Deluxe- next rustoration!
Mk 2 & XJ6 Jags. Less said the better.

when u bleed it u have to pump the pedel very slow

Thanks for the info guys.
I will try bleeding the brakes again
after I come back from holidays

Merry xmas and happy new year to all

Felix

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1966 mustang coupe 289 auto
1970 mgb roadster auto
1970 cooper S mk2
1976 mini S
1964 wolseley 24/80
http://s160.photobucket.com/albums/t173/1966mini/

im only going by what i was told but didnt the older master cylinders different to the clubbies? its just i wanted to replace my mastercyclinder with a new one becaus eit was buggered but i was told i could only recondition it because the ones for sale r for the earlie type which had a different set up on the brakes. i dont knwo i could b wrong and wasted extra money haha

cheers luke

Some late model clubbies and mokes had a dual circuit brake system and as such had a different master cylinder.

All single circuit master cylinders are identical in how they bolt up, connect to the pedals and plumb in etc just make sure you replace it with one that has the same bore diameter.

Matt

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If he's bleeding with a spare tyre he's not pumping the pedal too fast.....