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Re: Proportioning valve problem?
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Originally Posted by Dashman
Yes, the pressure differential valve will sense a fluid leak, and close the front or rear of the system where the leak is.
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Thanks for the confirmation.
Quote:
Originally Posted by Dashman
What about your rear cylinders? Did they sit for a while? Maybe they are seized? Maybe there was a leak, the fluid sucked in some moisture, and they rusted a bit?
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They look like new. And the brake fluid wasn't too discolored. I'd be surprised if both wheel cylinders are the problem. Looking at this, I think the guys who worked on the truck for my son must have totally rebuilt the brakes, except for the drums. Doesn't look like the shoes were doing much! I'll have someone put a little pressure on the brake pedal and see if the wheel cylinders do their thing.
I think I'll also try the brake cleaner blast from the prop valve output line to the rear tee.
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Mike
1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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