I have a 460 in my 1979 bronco which i believe is out of a 71 lincoln. We finally found a new master cylinder for it which took many weeks and now i have bench bled it and bolted it on and started to bleed the brakes but when i finished and started my car the brake light came on and the only way i get brakes is if i push the pedal all the way to the floor. I basically have no pressure at all. Im wondering if i bench bled it wrong. What i did was put plugs in the ports and attached tubes to them and put the ends of the tubes back into the fluid bowls and started to pump the master cylinder till i saw no air bubbles. They say to pump it until you cant pump it more than an 1/8th of an inch but i pumped it probably 50 to 100 times and felt no difference and it continued to go the full inch even though i saw no air bubbles so i installed it. When you pump the brakes fluide shoots out of the bowl as well as into the ports so it seems like there is air in it again. Also when i install the master cylinder do i not just bleed the bronco like i would normally bleed the brakes. someone was saying something about a needle on the proportioning valve and haveing to pull the needle when bleeding it. If anyone can help me in my problem it would be great cause i need brakes very soon. Thankyou. Sorry for the length but i dont want to leave anything out and give the best description i can. Thanks.
Joseph

 

This goes in the Big Bronco forum as it is truck related not 460 specific.


Dennis

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