mechohaulic Posted March 19, 2022 Share Posted March 19, 2022 not a computer person ; just a thought= older topics possibly can have the post date in a different color/print etc. for us older folk maybe BIG BOLD dates 1 Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-492650 Share on other sites More sharing options...
Joey Mack Posted March 19, 2022 Share Posted March 19, 2022 YES!! good call, Mech... Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-492651 Share on other sites More sharing options...
mechohaulic Posted March 19, 2022 Share Posted March 19, 2022 just don't delete them ;;; do that i'll be stuck talking to my wife , not reading interesting info LOL 1 Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-492652 Share on other sites More sharing options...
Antricluc Posted April 27, 2022 Share Posted April 27, 2022 I'm thinking his issue got fixed and just never bothered to post again?? I'm having the same issue as we speak. My NEW tu flo 550 continues to want to build pressure but I either dump the air or turn the vehicle off. I have a brand new governor but noatter how I try and adjust it(taking off bottom cap and either screwing it in or out) the pressure continues to build. There is a small hiss from wet tank where I believe is a pressure relief valve? Or is it the new governor is just bad?? I ordered ANOTHER governor hoping that's the only issue. HELP WOULD BE GREATLY APPRECIATED AS IM A SITTING DUCK OUT OF WORK.😭😭 Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-496159 Share on other sites More sharing options...
Joey Mack Posted April 27, 2022 Share Posted April 27, 2022 http://www.gonefcon.com/trucktcom/brakes_comp_unloader.gif A bad Gov. is possible. here is a typical plumbing diagram. mabey the lines are switched.. jojo... Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-496160 Share on other sites More sharing options...
Onyx610 Posted April 27, 2022 Share Posted April 27, 2022 Unloader valves? Check to make sure they are free. Anymore I’m finding out that new parts don’t mean they are good to go. I’ve heard of changing the whole dryer solved this issue. Im not gonna say go spend a few hundred but I’ve HEARD this has fixed this issue after all else was replaced. This was from a Mack dealership so take that for what it’s worth…Usually not much anymore. Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-496166 Share on other sites More sharing options...
mechohaulic Posted April 28, 2022 Share Posted April 28, 2022 pin hole/leak in line from governor to unloader won't let compressor "unload". 2 Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-496242 Share on other sites More sharing options...
Onyx610 Posted April 28, 2022 Share Posted April 28, 2022 1 hour ago, mechohaulic said: pin hole/leak in line from governor to unloader won't let compressor "unload". Very true. Quote Link to comment https://www.bigmacktrucks.com/topic/43446-air-pressure-runs-to-150/page/2/#findComment-496255 Share on other sites More sharing options...
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