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Old 09-05-2010, 03:40 PM   #1
GmtGmt
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Bleeding brakes

im trying to bench bleed my master cylinder but i cant seem to bleed the rear part of the master cylinder

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it must be for the rear brakes but i cant get any brake fluid out where the brake line ataces even if i remove my plug and press the piston all the way in

the front one works and have been able to bleed it.

i dont know if the master cylinder is bad or not because it has been without brake fluid for like last 5 years or so it might have become bad.

is there are a way to open these steel one i have removed the snap ring but cant get the piston out
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Tonight mine pulled a few cars out of snowbanks, and is sitting in my driveway, icicles on the grille, wheels just white cakes of snow, buried up to the lug nuts in powder, straps and chains wrapped around the bumpers, the outline of the wipers clear in 4 inches of snow on the windshield... A tired warrior of the 1980s in a world of low profile tires, front wheel drive, and plastic bumpers, where people stay in their houses until snowplows move the offending substance from their paths, too helpless to travel without AAA and chains and salt, clearing their windows with longhandled brushes while gently stepping around in the snow trying to stay nice and dry.
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Old 09-05-2010, 03:52 PM   #2
BigRed76
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Re: Bleeding brakes

If you have the snap ring already out, and if you have access to an air compressor, then take an air nozzle and blow air through the master cylinder where the line threads in and the pressure should push the piston and seals out of the master cylinder (be ready for the piston to come out because it may come out fast)
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1970 Chevrolet Custom Camper K20
1971 GMC Super K2500, 12V/NV4500 swap in progress
1971 Chevrolet Custom C10
1972 Chevrolet Custom Deluxe C20, 5.3/4L60E
1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi
2004 GMC Sierra 2500HD, LB7/Allison, CCSB
2005 GMC Sierra 1500, 5.3/4L60E, CCSB

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Old 09-05-2010, 04:41 PM   #3
GmtGmt
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Re: Bleeding brakes

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Originally Posted by BigRed76 View Post
If you have the snap ring already out, and if you have access to an air compressor, then take an air nozzle and blow air through the master cylinder where the line threads in and the pressure should push the piston and seals out of the master cylinder (be ready for the piston to come out because it may come out fast)
oh yeah forgot about that method thanks big red
i had my finger inside the piston on brake caliber when i blew it out trust me you ONLY do that one time
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Thomas

Quote:
Tonight mine pulled a few cars out of snowbanks, and is sitting in my driveway, icicles on the grille, wheels just white cakes of snow, buried up to the lug nuts in powder, straps and chains wrapped around the bumpers, the outline of the wipers clear in 4 inches of snow on the windshield... A tired warrior of the 1980s in a world of low profile tires, front wheel drive, and plastic bumpers, where people stay in their houses until snowplows move the offending substance from their paths, too helpless to travel without AAA and chains and salt, clearing their windows with longhandled brushes while gently stepping around in the snow trying to stay nice and dry.
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Old 09-05-2010, 07:47 PM   #4
BigRed76
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Re: Bleeding brakes

Glad I could help you
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Zach

1970 Chevrolet Custom Camper K20
1971 GMC Super K2500, 12V/NV4500 swap in progress
1971 Chevrolet Custom C10
1972 Chevrolet Custom Deluxe C20, 5.3/4L60E
1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi
2004 GMC Sierra 2500HD, LB7/Allison, CCSB
2005 GMC Sierra 1500, 5.3/4L60E, CCSB

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Old 09-05-2010, 11:20 PM   #5
wyattglock
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Re: Bleeding brakes

I don't know if this will help or not, but I was having a very similar problem with my truck and I also couldn't get any help with bleeding the brakes. I ended up buying the Motive Products #0105 from Jegs.com, after reworking the mount system to actually allow the adapter to seal, it worked great. I am not one to buy into the latest gimmick, but this one is actually a pretty good one.
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Old 09-08-2010, 01:32 AM   #6
grs
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Re: Bleeding brakes

I would just buy a rebuilt master.
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