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+--- Thread: System Won’t Build Air (/showthread.php?tid=9824)
System Won’t Build Air - rtjohnson1982 - 11-19-2024
Hey everyone, 2007 International 9200 w/Cummins ISX. Air system was full of water and overbuilding pressure in both tanks. Drained system and cleaned all the lines out best I could, replaced air governor on compressor and installed a new air dryer and cartridge and still not wanting to build pressure. It’s now building about 50-60 in wet tank but hardly any in primary and I’m at a loss of what to do at this point. Any advice would be very much appreciated! Truck is killing me in repairs and downtime. Thank you!
RE: System Won’t Build Air - Rawze - 11-20-2024
maybe it needs a whole new air compressor?. I had to replace mine at 800k miles.
RE: System Won’t Build Air - Yauchout - 11-20-2024
you should confirm that the main air line going from the compressor to the air dryer is not leaking.. if that truck has a ad-is style air dryer it will fill one tank to 70-90 psi before the other then they will both fill simultaneously. if your primary airline is leaking it may never built enough pressure to fill the other tank... it is designed to prioritize and fill the primary tank first but if you had the lines off it could be miss plumbed not and filling the secondary first