billc Posted April 28, 2012 Share Posted April 28, 2012 I'm new to this site and wondering if anyone can help with my Jake issues. I have a 2000 E-7 motor in a CX 613 Vision. The jake quits working as the oil heats up. One solenoid has been replaced and jake heads rebuilt by the local Mack dealer, $3000ish, and the problem remains. Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/24790-help-with-the-engine-brake-on-an-e7-mack-engine/ Share on other sites More sharing options...
demolitionman25 Posted April 28, 2012 Share Posted April 28, 2012 sounds like you have relay issues that once they heat up they will work intermittenly i always go for the electronics before going the other way and you might have a bad connection along the line Quote Link to comment https://www.bigmacktrucks.com/topic/24790-help-with-the-engine-brake-on-an-e7-mack-engine/#findComment-116558 Share on other sites More sharing options...
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