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ducttf1
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Post subject: how to get a seized piston out of a brake master Posted: Sat Jan 26, 2019 9:43 pm |
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Joined: Sun Aug 08, 2010 8:03 pm Posts: 1158 Images: 0
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huit
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Post subject: Re: last hope to get a seized piston out of a master Posted: Sat Jan 26, 2019 9:49 pm |
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Joined: Sat Oct 29, 2011 3:38 pm Posts: 800
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Nice work Lou! Very good save of a rare piece. Paul
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Sam
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Post subject: Re: how to get a seized piston out of a brake master Posted: Sun Jan 27, 2019 5:05 am |
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Joined: Mon Dec 13, 2010 4:50 am Posts: 87 Images: 1 Location: Scotland
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In the past I have used a piece of aluminium dowel up through the banjo end after removing the fitting then knock out the piston ?
Sam
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wdietz186
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Post subject: Re: how to get a seized piston out of a brake master Posted: Sun Jan 27, 2019 10:17 am |
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Joined: Thu Oct 14, 2010 7:30 am Posts: 174
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Lou, The crap comes from the water the brake fluid absorbs from the air and its reaction with the alloys that make up the cylinder, piston, and washers. It's all a reminder to change your fluid regularly. Silicone fluid would seem to be an answer but while it doesn't absorb the moisture it doesn't exclude it either so the water still corrodes things when it gets in.
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ducttf1
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Post subject: Re: how to get a seized piston out of a brake master Posted: Sun Jan 27, 2019 2:01 pm |
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Joined: Sun Aug 08, 2010 8:03 pm Posts: 1158 Images: 0
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Hi Guys, I know hydroscopic brake fluid. I just think it's funny how nasty it gets. I think the problem with silicone is also boiling point is lower than DOT 4. I remember Harley used it for a while and then stopped. Sam how big was the dowel? The hole on the banjo end is tiny. Lou
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Sam
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Post subject: Re: how to get a seized piston out of a brake master Posted: Sun Jan 27, 2019 4:32 pm |
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Joined: Mon Dec 13, 2010 4:50 am Posts: 87 Images: 1 Location: Scotland
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Come to think of it it may have been a drill I used, and as large as the hole would permit. The drill or dowel will pass through the spring and then up against the piston.
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