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Post by Deleted on Apr 20, 2009 4:40:35 GMT -5
 Over the winter I had the brakes changed to a dual master cyl system & added a Hurst line-loc. The 1st time out, I drove it about 40 mi on primarily highway & Interstate-type roads, parked for about 1-1/2 hrs, then drove back. I was almost home, stopped for gas & noticed the brakes "hung". Drove the 1-1/2 mi home & parked it. Figured I'd wait for everything to cool down & then check it out. Didn't get to it by the weekend, weather was nice & an acquaintance came over w/ a really nice rebuilt & restored Torino, so we decided to go for a drive. We were driving fairly slow (tops about 55-60) & after about 20 min, I noticed the brakes "dragging". About 5-6 min later, we had to stop for a construction zone- smoke was pouring out of the rear! The brakes were so locked up, it took something like 2 hrs for them to release! The tow truck arrived & I had it taken to the shop where I had had the master cyl & line lock put on. So far, he's re-routed the brake lines farther from the exh manifold, taken it for a short drive (just enough for the brakes to start locking up) & then opened the rear bleeder- fluid comes out under pressure. Any ideas what could be wrong? Sure would appreciate any ideas!  Thanks, Ralph
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Post by bubbasz1 on Apr 20, 2009 5:34:55 GMT -5
Some systems have a anti drain back valve, don't know if yours does but might be something to look at, maybe faulty valve, or faulty proportioning valve.
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Post by nickthefish on Apr 20, 2009 7:47:31 GMT -5
Do you have the shoes on right? I had done the brakes on one of my cars about 20 years ago and had the shoes on wrong. One was longer than the other and caused the rear brakes to hang up when I applied pressure.
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Post by Deleted on Apr 20, 2009 7:51:25 GMT -5
Do you have the shoes on right? I had done the brakes on one of my cars about 20 years ago and had the shoes on wrong. One was longer than the other and caused the rear brakes to hang up when I applied pressure. Ypu, I'm sure, as I haven't changed the shoes- just the master cyl & install the line lock. @bubba: I'll talk to the mechanic tomorrow- shop's closed today. In any case, I'll post what we find. Ralph |
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Post by nickthefish on Apr 20, 2009 8:47:19 GMT -5
Imagine that! A shop in Germany closed on a Monday....they must be open Saturday's than?
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Post by Deleted on Apr 20, 2009 9:12:49 GMT -5
Imagine that! A shop in Germany closed on a Monday....they must be open Saturday's than? Yup! R. |
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Post by Deleted on May 26, 2009 20:38:54 GMT -5
The rod from the brake pedal to the master cylinder maybe adjusted to long. This pushes the piston in the master cylinder down slightly and that covers the port that releases the fluid pressure when the pedal is released. As the fluid heats up it cannot get back into the master cylinder as it expands and it just keeps getting worse, until it cools off.
G
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Post by Deleted on May 28, 2009 3:36:35 GMT -5
The rod from the brake pedal to the master cylinder maybe adjusted to long. This pushes the piston in the master cylinder down slightly and that covers the port that releases the fluid pressure when the pedal is released. As the fluid heats up it cannot get back into the master cylinder as it expands and it just keeps getting worse, until it cools off. G That's basically what happened. The dual master cyl unit is longer & the piston comes out farther (actually past the end of the unit!) when the piston is released. SO.... I had to get a guide for the rod to keep it aligned w/ the piston, then adjust the rod travel AND all 4 wheel cyls! Works great now! Also installed a Hurst line loc while I was at it! @ Bro, Ted or RamZ: This might be something useful for one of your sites!?? Ralph |
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