Master Brake Cylinder Question

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Chucks66
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Master Brake Cylinder Question

Postby Chucks66 » Tue Oct 11, 2011 8:04 pm

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
1967.5 SRL 311 #00148 Unholy Grail
1967 Nissan Patrol #L60 10218 Old Man
2014 Ford F250 Platinum 4 door 4x4
2009 Tahoe

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Chucks66
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Re: Master Brake Cylinder Question

Postby Chucks66 » Wed Oct 12, 2011 11:04 am

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?
Chuck Grohs
1967.5 SRL 311 #00148 Unholy Grail
1967 Nissan Patrol #L60 10218 Old Man
2014 Ford F250 Platinum 4 door 4x4
2009 Tahoe

George H
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Re: Master Brake Cylinder Question

Postby George H » Wed Oct 12, 2011 11:06 am

Hit the open end on a bloke off wood to force the piston out, if nothing is still holding it in.
George
67 2000
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Chucks66
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Re: Master Brake Cylinder Question

Postby Chucks66 » Wed Oct 12, 2011 11:24 am

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.
Chuck Grohs
1967.5 SRL 311 #00148 Unholy Grail
1967 Nissan Patrol #L60 10218 Old Man
2014 Ford F250 Platinum 4 door 4x4
2009 Tahoe

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Chucks66
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Re: Master Brake Cylinder Question

Postby Chucks66 » Wed Oct 12, 2011 12:17 pm

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
Chuck Grohs
1967.5 SRL 311 #00148 Unholy Grail
1967 Nissan Patrol #L60 10218 Old Man
2014 Ford F250 Platinum 4 door 4x4
2009 Tahoe

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K1200 GT
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Re: Master Brake Cylinder Question

Postby K1200 GT » Wed Oct 12, 2011 12:19 pm

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
Life is good...but I want more
If I cant fix it, It aint broke
Rich

2000 Miata Special Edition 6 spd/LSD
1970 SPL 311
1999 Dodge 3/4 4x4
1986 Toyota Cressida
2003 BMW K1200 GT
1984 Rabbit Bosch fuel injection/5 spd.
1967 Saab 3 cylinder/2 cycle/ 4 speed

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Chucks66
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Re: Master Brake Cylinder Question

Postby Chucks66 » Wed Oct 12, 2011 8:17 pm

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...
Chuck Grohs
1967.5 SRL 311 #00148 Unholy Grail
1967 Nissan Patrol #L60 10218 Old Man
2014 Ford F250 Platinum 4 door 4x4
2009 Tahoe

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spyder
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Re: Master Brake Cylinder Question

Postby spyder » Thu Oct 13, 2011 1:05 am

Pitted. Was that what held it in?

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FergO2k
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Re: Master Brake Cylinder Question

Postby FergO2k » Thu Oct 13, 2011 7:33 am

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.
Fergus O
69 2L, SUs (driver, not susceptible to polish)
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Linda
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Re: Master Brake Cylinder Question

Postby Linda » Thu Oct 13, 2011 9:52 am

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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