Jon asked: Do all pressure gauges come up to full system pressure in what is the normal amount of time? Yes. After starting the Detroit the two gauges on the dash come up to 120# in a reasonable time and hold pressure.

Can you hear the air dryer purge often as the front is trying to rise? By often I mean the normal amount of time between purge cycles? I hadn’t listened for that, I’ll do a test today and listen. If I understand correctly how the air dryer purge works, more often is better than less often; correct?

You mention cold temps but don’t say if this started since the temps got cold which could be coincidental or a clue. Its often slow when its warmer (50’s/60’s) as well, but not like it was Sunday. Sunday was probably the slowest.

How often have you been running the aux. compressor prior to the cold temps I run the aux compressor to run the toilet when we’re parked and the pressure in the system drops. I noticed that sitting in the coach in the evening (temps low 30’s, hi 20’s) with the aux compressor on, the compressor ran more often than in the warmer temps.

and how have you been preventing moisture from entering the accessory tank. How would I do that? What actions can I take to keep that moisture out?

The Liberty “spitter” is not the best protection against moisture. Is there a better option that I should consider installing?

Don asked: There are only 2 airbags raising the front, and there are 6 raising the rear. I bet the normal ride height pressure in the front airbags is higher than the rear? That tends to make sense to me, but I have no way of determing those pressures and possible delta.

Does your bus have an accessory system pressure gauge? Not on the dash, just in the steering bay. Mine didn’t. I installed one in my dash and another in the steer compartment so as to know what’s going on with the level system air, etc. That sounds like a good idea, I’ll consider that. I like more gauges than less so I can see what’s going on. The more the accessory system leaks, the longer it takes to air up. That certainly makes sense to me. If the aux compressor runs more often in cold temps, that points to a good sized leak or more leaks … leaking air can’t get into the air bags to raise the coach.

Thanks for the advice and comments.