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#1
03-06-2011, 03:33 PM
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I need help with brakes
I installed a disc conversion and new master, booster, and proportion valve on my 68 bird. I bench bled the master, then I tried to vacuum bleed the brakes with no luck. Then I tried to manually bleed them with no luck. So I disconnected the lines an pressure fed them full of fluid and tried to bleed them again...nothing. I have no pedal pressure and when I open the bleeders fluid will just trickle out with no real pressure. Could the master be bad ? Any ideas. The entire brake system is new.
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#2
03-06-2011, 03:57 PM
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Did your kit come with two pushrods to chose from for the booster to master?
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#3
03-06-2011, 05:36 PM
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No, the booster, master, and valve came preasssembled and only came with an adjustable rod to connect to the pedal.
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#4
03-06-2011, 08:47 PM
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I feel your pain Max. I am pretty much in the same boat. Although I am getting plenty of fluid at all locations when I bleed. I would believe your pushrod is incorrect and not going in far enough. Hope somone can help out!
__________________
69 Firebird Convertable |
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#5
03-06-2011, 11:12 PM
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How do I know what the correct length rod would be ?
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#6
03-06-2011, 11:18 PM
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Take the master cylinder off and step on the brake pedal it should move out aprroximately 1 inch I have several longer new ones if you need one.
__________________
Michael Garrison High Torque Racing Auto Body Meriden Kansas 1970 GS Stage1 (wifes car) 12.78@104 all by herself!! 1970 GS 455-BUZILLA 538 826HP [email protected] so far thru the muffs Another bitter rural American clinging to my guns, my God and religion. I repo & sell buick parts!! |
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#7
03-07-2011, 07:37 PM
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It moves out a little more than an inch
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#8
03-07-2011, 09:26 PM
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If you bleed the master and it was pushing out fluid I might suspect the distribution block.
What all came with your conversion kit? It is a stock disc break conversion? |
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#9
03-07-2011, 09:40 PM
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is there a way to test the proportion valve ?
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#10
03-08-2011, 12:05 AM
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is this a 4-wheel or 2 wheel disc conversion?
I had the same issues with a disc conversion, fluid coming out but very little pressure, and I discovered that I was sold the wrong master cylinder. the master cylinders for disc brakes push out a lot more fluid because they have a bigger piston(s) to move in comparison to the wheel cylinder.
__________________
Don't tell people how to do things. tell them what needs to be done and be surprised by their ingenuity. -- Gen. George S. Patton -------------------------------------------- |
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#11
03-08-2011, 03:51 PM
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I did just the front brake conversion. I bought the master, booster, and valve as a unit seperate from the rest, but I specified for front disc rear drum. How can I tell if I got the wrong master ?
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#12
03-08-2011, 04:01 PM
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Quote:
Can you post a picture of what you have? |
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#13
03-09-2011, 10:39 PM
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today I plugged the ports right at the master and still no pedal pressure. I would have to say the master is no good. Or should I try to bench bleed it again ?
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#14
03-10-2011, 10:59 AM
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When you bench bled it originally, did you get good flow from the ports? If so, I'd say you have a problem with the length of the push rod. When you bench bleed it, measure how far the piston goes in the cylinder.
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#15
03-10-2011, 07:39 PM
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They are sending me a new master. Hope that's it
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