QCDriver Posted September 21, 2006 Share Posted September 21, 2006 I read the forums from time to time, and love looking at all the old Mack pics.. Now I need some advice on modern Macks.I have a 2001 CH613 281k,mi. day cab with the Meritor brakes and ABS. I pulled a load Monday and after I was empty and driving home I had a hard time stopping.( trailer brakes locking up)I took my time back to yard and unhooked drove out from trailer, only brakes that worked, fronts.. Stopped tractor and inspected rear brakes, within adjustment but adjusted agian.. I drove off felt good for 2-3 stops, THEN ONLY fronts./?? I live 6 miles away at this point and limped home..When I got home and asked wife to apply brakes and the seemed to apply full 2-3 times @130psi then nothing till under 100 psi and the appiled harder and harder as pressure dropped.I broke off all service air lines to hear flow, fronts full output all the time. While the rears full at first, then nothing till 100psi or lower.I have installed a new foot valve and did the same thing..??Pulled fuse for ABS ign. brakes worked fine. I thought that when ABS fails you still should be able to stop..?Anyone run into this problem??Thanks in advance for the feed back,Doug Quote Link to comment Share on other sites More sharing options...
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