Smith & Sons
New member
I have a cat 66dx35g1i and having problems with it maintaining pressure. After checking the 6 valve kits and replacing any damage seals of valves my Pressure is great but it won't last long. I can not figure out why I have a new unloader and it is not leaking water. Anyone have any suggestions on what to do? I'm at a complete loss and it is killing me. Two pumps having the same problem. Pressure is great. Cat Parts #34260 Kit, Valve (Inclds: 163,164,166,167,168,172)