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310/311 Datsun Sports Roadster 1962-1970
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PostPosted: Tue Oct 11, 2011 8:04 pm 
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Im playing with my old duel master brake cylinder and cant get the rear piston out? I removed the two hex screws and the front or closest to the fire wall is longer then the rear (see pic) is this normal?
I was thinking that part of the screw is broke off in the housing and thats why i cant get piston out.
Also i need to order a new master any ideas on where to go.


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Chuck Grohs
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PostPosted: Wed Oct 12, 2011 11:04 am 
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Ive found out that the short screw is correct, but i still cant figure out how to get the piston out. It does move in and out a little when i push on it with a long screwdriver but will not slid out like the first piston did.
Has anyone done this before?

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PostPosted: Wed Oct 12, 2011 11:06 am 
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Hit the open end on a bloke off wood to force the piston out, if nothing is still holding it in.

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PostPosted: Wed Oct 12, 2011 11:24 am 
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I have tried that, it really feels like something is stoping it. when i push it in with the screwdriver and let the spring push it back out (about 1 inch) i hear and feel it stop on something.

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1967.5 SRL 311 #00148 Unholy Grail
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2014 Ford F250 Platinum 4 door 4x4
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PostPosted: Wed Oct 12, 2011 12:17 pm 
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Ok. After sawzalling an older duel master cylinder apart i have found that if the rear piston doesnt come out your screwed!!! its rusted in and will never come out.
Time to buy a new one

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2014 Ford F250 Platinum 4 door 4x4
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PostPosted: Wed Oct 12, 2011 12:19 pm 
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What happens when you take the 2 fittings out of the bottom? I assume you have the inside snap out of the back....some do.

Rich

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PostPosted: Wed Oct 12, 2011 8:17 pm 
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I got it out!!
With nothing to loose i soaked the inside with some fresh oil and started beating the H out of it, after about the hundreth smash on a piece of wood the piston slid out. To bad after all the work the cylinder is pitted...

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2014 Ford F250 Platinum 4 door 4x4
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PostPosted: Thu Oct 13, 2011 1:05 am 
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Pitted. Was that what held it in?


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PostPosted: Thu Oct 13, 2011 7:33 am 
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There are companies (someone will chime in.... Linda?) that will bore and stainless sleeve it for you, avoiding future pitting. Not outrageous prices either as I remember.

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PostPosted: Thu Oct 13, 2011 9:52 am 
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Chiming :) Yes, the company is Karp's Power Brake http://www.resleeve.com" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;. They can do masters, brakes, rear cylinders etc with a SS sleeve to eliminate rust. I used them for my stock brakes and was pleased with their service. There is a brake thread where I posted their work.
I think it is also a smart option for cars that don't get driven much, or that aren't maintained well enough.

Linda

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