hey everyone I am working on a buddys c10 pickup. He bought the booster, mastercyl, and proportioning valve kit from POL specifically for his truck. I myself have been a mechanic fulltime since 1999, I am ase certified in brakes and many other things, ( i am not tooting my horn just explaining that this isnt my first rodeo) Thsi is a disc front drum rear I am haveing a hell of a time bleeding this system. POL says im not bleeding it right, and not bench bleeding it right. 1. I have bled it on the bench with there bench bleed hose kit, I have used my fingers to bleed it by blocking it off. I have tried everything, 2. I have tried bleeding it on hte truck. 3. I have used my power bleeder that forces fluid in the master and sucks out the bleeders. 4. I have drip bled it 5. I have adjusted all brakes 5 times the problem is, I will let it drip bleed for a night keeping it full, when i pump the pedal they feel decent, then i crack the line, they have good drop, then after that it has no pedal or fluid flow.' I noticed tonight when i bench bled the master that when i was useing there hose kit i would watch about a inch of fluid pump out of the master cyl in the hose and when i let the master back out it would suck in 5 inches of fluid, I cant get the front chamber to bleed properly and i think this is my issue, i think that the master is crap. I went and got a new one from the parts store and it has a different piston inside the bore that is recessed. I need to get a part number or new one from POL but i cant get ahold of them till morn. Do you guys think i am on the right track i am just frustrated as hell. I before ya ask i have adjusted the pedal so it has full travel and that the master cyl is completely out before the stroke starts to go in anything would be great HELP
Take the master apart if you think it is bad. If it's bad, you will see something wrong. Advice from an ex-ASE in brakes
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