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So I replaced the 3 front valves. You can get them at most air brake shops it just 2 way valves all 3 are the same.. Simmons in lawrence Ma. It solved the problem with the front glade hands leaking air. Now I have a new issue. After i pump the brakes 3-4 times the rear brakes lock up. If i...

I have a similar issue with the front Blue glad hands front and back leaking air when i press the brake pedal. I removed them and plugged them up with a brass fitting. Now when i apply the brakes, the whole truck locks up. The reason i'm trouble shooting the brakes is thier was very little...