Medium and Heavy Trucks
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Hi my name is***** will be glad to try to help. Check the compressor discharge line for leaks and if none check that the discharge line is actually pumping air and the compressor is cut in pumping air. If not try a new air governor and check the inlet check valves and fittings at the air tanks for carbon and restrictions. Drain the tanks and be sure they are not full of water as well. If you have an air drier see if it is restricted by bypassing the lines with a union
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