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Harry, I do not know if you are safe or at risk, but I do know this. If you get a low pressure alarm on your brake system that is a major serious problem. Based on your posts I have no clue how you could have a leak that repairs itself, but you have something going on that is far outside anything normal.
Is your coach coming to ride height with the level low set for driving?
If it is not, from a low pressure start on all systems, will your brake systems reach 120 PSI?
Do your pressure problems arise when you release the parking brake? Do they go away when you apply the parking brake? Do they go away when you put level low in the manual position? Was the bus running when you did the DOT brake check?
How about starting again to give us circumstances about how the low pressure warning came on.
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That’s a lot of stuff Jon and next week I’ll get the answers. I fully appreciate your caution and thank you for it. Having a low air light come on is not a good thing!
Harry
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Hey Harry, not being facetious, but you sure that’s not a “Hot Air” light?
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