TOMD Posted October 22, 2011 Share Posted October 22, 2011 selling three GU713's (stock trucks). trucks are straight truck now, have to change over to tractor trailer air system. have most of valves figgured out. not sure on all of plumming. has anyone done any before?looked through service bulletin was some help, but want to be 100% sure. any help would be greatAIR BRAKE ROUTING SCHEMATICS.pdf Quote Tom ~ Parts & Service SpecialistWatt's Mack Sales, Inc. 1-888-304-6225 Link to comment https://www.bigmacktrucks.com/topic/21234-changing-air-brake-system-from-straight-truck-to-tractor/ Share on other sites More sharing options...
rhasler Posted October 22, 2011 Share Posted October 22, 2011 We did one in our shop but I wasn't directly involved in it. I remember it got pretty hairy because the customer wanted to be able to remove the 5th wheel and install a body load water tank whenever he needed to. Kind of a quick change setup. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/21234-changing-air-brake-system-from-straight-truck-to-tractor/#findComment-89186 Share on other sites More sharing options...
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