Hello, I have a 66 chevy c60 dump truck, it has some serious brake problems. Good in other areas, it has been used on a farm for years. The two previous owners, the truck out liveing one of them. Both just used the e-brake after the brakes started to fail. Parts being as I am finding, hard to find a large part of the reason. The flex hoses being blocked, with no fluid going to the wheels. Once the hoses where replaced, the master cylinder was the exit problem. Once that was replaced, pressure on the wheel cylinders caused them to leak. Once they were rebuilt, and found brake shoes and those replaced. Now I find the hydrovac has problems. The brakes can be pumped up, but will not remain pumped up after it sits a bit. I hear vaccum in the cab coming from the vent behind the seat. You can hear the engine change sound, like a vac leak when the brakes are depreesed. So now I assume the hyro is the problem, leaking vac, and the soft pedal. I saw the post on A hydrovac rebuild, the web site given no longer goes to a site haveing to do with brakes. NAPA has hydrovacs but it is hard to tell by the pics and the vac on the truck no longer having numbers, not sure which will work for my truck. Any info, thoughts, advise welcomed.
