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Author Topic: Bench Bleed  (Read 7602 times)

Offline Canadian 4X4

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Bench Bleed
« on: August 09, 2010, 05:54:35 pm »
I just picked up a new master cylinder for my grandpa's 77 c10 we will probably be installing it tomorrow i have read on here that you have to bench bleed the master cylinder but i cant find how you actually do it, any help is greatly appreciated
Thanks
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Offline VileZambonie

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Re: Bench Bleed
« Reply #1 on: August 09, 2010, 08:45:04 pm »
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Offline beastie_3

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Re: Bench Bleed
« Reply #2 on: August 09, 2010, 10:03:51 pm »
They just showed it on powerblock as well. Check their site, you might be able to find the video clip.
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Offline 86gmc23

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Re: Bench Bleed
« Reply #3 on: August 10, 2010, 08:42:42 pm »
Its pretty simple, you just need plugs to screw in where brake lines go, fill the reservoir with brake fluid and use something to push the piston (which is what the brake pedal pushes), and just keep pushing it in and out until no bubbles are seen in the reservoir. Haven't done it in awhile but I'm pretty sure thats it.
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Offline topp

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Re: Bench Bleed
« Reply #4 on: August 11, 2010, 11:55:44 am »
But prior to putting the plugs in and bleeding it, make sure fluid is coming out of the holes where the lines screw it.  The seals MUST be lubricated with brake fluid PRIOR to pumping the air out....
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Offline Canadian 4X4

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Re: Bench Bleed
« Reply #5 on: August 11, 2010, 05:49:16 pm »
well i put the plugs in prior to putting the oil in the master cylinder, it came with a little instruction book and i just followed that but the old master leaked so the fittings on the lines were wet anyways i think it will be ok i took it for a drive and everything was good
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Offline 86gmc23

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Re: Bench Bleed
« Reply #6 on: August 11, 2010, 08:01:14 pm »
Quote from: topp on August 11, 2010, 11:55:44 am
But prior to putting the plugs in and bleeding it, make sure fluid is coming out of the holes where the lines screw it.  The seals MUST be lubricated with brake fluid PRIOR to pumping the air out....

I thought there was something I was missing
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