ws721 Posted March 12, 2014 Share Posted March 12, 2014 Ok, First, Thank you to those of you who gave me advice. I hate to admit how foolish I was. Heres what the problem was. After replacing the foot valve and tractor protection valve the brakes would still sometime not release. The culprit was a plugged exhaust line from the trolley valve. Problem solved. Hope this can help someone else who maybe experiencing issues. 1 Quote Remember if it's got a hood it's no good! Link to comment https://www.bigmacktrucks.com/topic/35013-mh-brake-issues/ Share on other sites More sharing options...
Mack Doctor Jr. Posted March 20, 2014 Share Posted March 20, 2014 👍 Quote Link to comment https://www.bigmacktrucks.com/topic/35013-mh-brake-issues/#findComment-238304 Share on other sites More sharing options...
doubleclutchinweasel Posted March 22, 2014 Share Posted March 22, 2014 Well...That makes just a whole lot of sense.Glad you found it. Still curious that it was intermittent... Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/35013-mh-brake-issues/#findComment-238678 Share on other sites More sharing options...
Bmodel I wish Posted March 25, 2014 Share Posted March 25, 2014 I fought a similar trouble to this for several hours. Turned out to be a kink in the supply line on the trailer cord that couldn't be seen because of the protection spring covering it. Talk about frustrating. Quote Link to comment https://www.bigmacktrucks.com/topic/35013-mh-brake-issues/#findComment-239100 Share on other sites More sharing options...
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