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 Brake master cylinder diagram
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OWEN
V4 Fanatic

United Kingdom
258 Posts

Posted - 29 Sep 2012 :  13:22:16 Show Profile Reply with Quote
Can anyone point me to a diagram on the internet so that I can reassemble a brake master cylinder from a 1972 V4? Haynes seems to have the wrong diagram

Also, I assumed it was the master cylinder when my foot went to the floor but Haynes tells me that could be a leaking slave cylinder. Don't know how that could be as there are two separate circuits/pipes. Any advice anybody.

OWEN
V4 Fanatic

United Kingdom
258 Posts

Posted - 29 Sep 2012 :  15:10:51 Show Profile Reply with Quote
So here I am replying to my own post! Did a search and found the diagram posted by pdickens. Thanks.

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PDickens
V4 Mad

United Kingdom
519 Posts

Posted - 29 Sep 2012 :  15:49:28 Show Profile Visit PDickens's Homepage Reply with Quote
Was just about to point you in the direction of my earlier post!

Haynes most likely mean one of the rear wheel brake cylinders - if its that then you usually can see brake fluid on the inside of the rear wheels.
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OWEN
V4 Fanatic

United Kingdom
258 Posts

Posted - 01 Oct 2012 :  07:49:13 Show Profile Reply with Quote
Turns out to be a leaking rear brake hose.
The way it works is that if the pedal travels to the floor and if the level in the master cylinder is low you top it up and the brakes work for a while (because one line is working) until so much fluid leaks that the working line doesn't work anymore and the pedal travels to the floor again. Obvious really but I had to go through changing the seals on the master cylinder to relearn that! On the other hand, if you top it up and the pedal still travels to the floor then you need to renew the seals in the master cylinder.

Engage brain before opening toolbox...........
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