Ronny-Mack Posted 2 hours ago Share Posted 2 hours ago Does anyone by chance have the air system diagram for the midliner series? I was able to find the specifications, but it trying to find out why my primary tank isn’t building air but my secondary is Quote Link to comment https://www.bigmacktrucks.com/topic/75055-mack-midliner-cs300p/ Share on other sites More sharing options...
Geoff Weeks Posted 2 hours ago Share Posted 2 hours ago The two tanks should be T'ed off of the wet tank. So a stuck check on the inlet (not likely) or a leak at the the brake treadle valve or other part of the primary system. Plug off the outlet of the primary and see if it builds. Quote Link to comment https://www.bigmacktrucks.com/topic/75055-mack-midliner-cs300p/#findComment-567350 Share on other sites More sharing options...
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