[Brett]

same question some time ago. The answer is, the way I understand it, when you are driving your bus from A to B, the bus compressor will provide all the air. It is when you turn off the engine, when the auxilliary compressor enters the picture because it will recharge the air system on an as needed basis.

The way you are asking this question, I am wondering, whether you do have an actual on/off switch? If you do, then there is an easy way to show how the compresor functions.

In other words, the next time you are in the bus without running the engine, turn on the auxilliary compressor.

If it starts to run, then it tells you your system is charging because it has lost air pressure, somewhere. This will happen in all likelihood because there are very few buses without air leaks.

Cheers,

Ronald

5 years ago I was a Prevost newbie, too.

[Archived]

Mine gives air for the Pocket Doors , Air Floor , Air Lock for entrance door and Toilet I think . And Air Bags on Generator. Not sure what else ? ( When Parked )

[Archived]

During Camping time, aux air provides air as described above to air pocket doors, air toilet(if you have toilet controled by air) air bags to generator, dump valves(if air operated) and depending on conversion and type-slide out air bladder…so those that have manual pocket doors, have gotten rid of the air toilet and are non slide actually have very little use of aux comp…

So like everything depending on year, conversion, and slide outs depends on aux air system…

[Brett]

The bed.

[Archived]

Don’t forget the engine belt bellows, without aux air they’re loosy goosy on start up.

Now you’re going to here Jon bust my chops about the bellows and before that begins, he’s never threw belts at start up because of no aux air and I have…

[Archived]

Tom is a little testy because he knows I am right.

When commercial seated coaches lose aux air after sitting a while we all know they don’t bring out a hose to air up the coach so they can start with tight belts I will rely on my aux air comressor to tighten belts prior to engine start.

BTW, we also disagree on slides and OTR so if you all want to open up some other discussions let me know. Nancy is on my side because she wants slides and got a Jeep Wrangler instead.

[Dana]

Thanks for this information. I did not know firing up the auxiliary compressor was part of the start up process…..good to know. As I live north of the 49 parallel, I use the Webasto for a good 3 hours to pre-heat the engine before starting. Now I will add the auxiliary air compressor to my start up list.

[Archived]

Allan you don’t need to turn the aux compressor on to start it , I am like Jon I start it if the belts are loose just don’t put on high idle until all gauges reach a least 90 psi and you will have no problems , but do check the belts once you start it just go back and look while it’s airing up

[Tim]

I just replaced the Microflush LF 210 with the Tecna slilent plus and did not relize the air toilet was tied in to Detroit air, because I just fired up coach and the 1/4 inch line that went to toilet was blowing air. I thought the omly thing that compressor did was for toilet ? At ompressor air switch I see the 3/8 air line going to it from some where up inside? Do I just cap it off?
Is there something else compressor is for?

[Peter]

Your toilet gets it’s air from aux air, whether supplied from the aux compressor or the engine compressor.

[Archived]

If you want you can hook the Gen air bags to fill automatically from the compressor with little work , that way you don’t have to fill them manually

[Archived]

How do you do you do that? There are 3 air gauges on dash the 2 on left are front and rear tanks the one on right came up a min ago when I turned on compressoris that wet tank or an aux tank?
Buy the way that new toilet is fast and quiet and lots of water ajustment if needed,It was quite the project installing it.

[Per]

Your primary and secondary gauges are for brakes and have no bearing on aux air. The 3rd gauge should be reading the Prevost aux tank air. The wet tank does not have an air gauge.

[Art]

That gauge is the aux tank , was your toilet on the drivers side ????? if it was use the are line from the toilet put a check valve in line not in the Gen bay and a pressure regulator and hook to Gen air bags

[Art]

Toilet was on passanger side.