Justinizme Posted September 30 Share Posted September 30 Hello all, As the title states, I am having an issue with a truck in my shop. It is intermittent, and happens when the brakes are applied during shifts and if you sit in the cab and rapidly apply the brakes. After a few seconds, it will slowly release and operate as normal. I am stumped here. Should I start with the hill assist valve? I have no codes for brake issues and no lights/messages pop up. Quote Link to comment https://www.bigmacktrucks.com/topic/74595-brakes-staying-applied-once-brake-pedal-is-released-2012-mack-cxu/ Share on other sites More sharing options...
fjh Posted September 30 Share Posted September 30 assist valve? I have no codes for brake issues and no lights/messages pop up. Its a good start! Quote Link to comment https://www.bigmacktrucks.com/topic/74595-brakes-staying-applied-once-brake-pedal-is-released-2012-mack-cxu/#findComment-559251 Share on other sites More sharing options...
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