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-   -   Auxiliary leveling air compressor cycling (https://www.irv2.com/forums/f115/auxiliary-leveling-air-compressor-cycling-377359.html)

dverstra 02-02-2018 10:00 AM

Auxiliary leveling air compressor cycling
 
Not sure if I described that correctly in the title. We are sitting at our site in the campground. I leveled the coach with the HWH Air Leveling System. I have the dual Air/Hydraulic system option. Every 20 to 30 minutes there is a small compressor near the back axle that cycles ON for about 30 seconds. It does this whether I turned the power OFF on the Leveling System or not. It also does it if I level the coach with hydraulic instead. I think it does it a less often if I hydraulic level the coach. It is annoying since it is right under the bedroom area:eek:. Any thoughts? Lack of sleep is starting to affect me:banghead:

Green D 02-02-2018 10:20 AM

You can run a wire for a switch to shut it off when not needed.
Its my understanding they work that way, makes no sense to have it be active all the time.
I noticed the same thing on my A/C and my compressor is in the front left, right under the drivers seat.
I ran a couple wires into the cockpit and used a spare empty knockout in the switch panel. I added a factory style switch I found on Amazon that had compressor written on it works and looks Great! :thumb:

vito.a 02-02-2018 11:09 AM

My 07 did the same thing. The air compressor used on the 07 is loud, especially at 2am.

You have an air leak, or more likely several air leaks in the mass of air suspension lines. I spent some time under the coach with a spray bottle of mixed dish soap and water finding them. Most were easy to fix, some are more work. They are small black plastic hoses that just push into the air fittings and seal with an oring. If you relieve the air pressure, they pull right out. Usually you can clean the hose and cut 1/4" off and reinsert it. On some I had to replace the fitting. I bought lots of straight and 90 degree air hose fittings to replace the old ones.

With some effort, the air pump would only run once every few days (usually when the temperature drops).

dverstra 02-02-2018 11:28 AM

Thanks Guys. Looks like I'll spend a little time under the it when I get to a site with less lumpy gravel or concrete. Maybe I'll just put a switch in the line or find it's fuse? Rear run box maybe? A guys gotta sleep!

Mr_D 02-02-2018 11:33 AM

I have only air leveling on my CC, they mounted the pump in the electrical bay in front of the drivers side front wheel, about as far away from the bedroom as possible. I dom't think I've ever heard it run even sitting up front. Yes, they are set to run if the leveling sensors detect an out of level condition.

Green D 02-02-2018 11:33 AM

I agree air is leaking down to trigger the compressor to start.
On mine it isn't re leveling or in need of more air due to the leak. My coach will hold its air level setting for many many days without going off level.
It appears to be just the compressor kicking in a couple times a day to hold the pressure switch closed. Not affecting the levelness of the coach.
Next time I grease the chassis I will check air connections. For now I like my switch just turn it off.

10Boomer 02-02-2018 02:40 PM

Quote:

Originally Posted by dverstra (Post 4019681)
Not sure if I described that correctly in the title. We are sitting at our site in the campground. I leveled the coach with the HWH Air Leveling System. I have the dual Air/Hydraulic system option. Every 20 to 30 minutes there is a small compressor near the back axle that cycles ON for about 30 seconds. It does this whether I turned the power OFF on the Leveling System or not. It also does it if I level the coach with hydraulic instead. I think it does it a less often if I hydraulic level the coach. It is annoying since it is right under the bedroom area:eek:. Any thoughts? Lack of sleep is starting to affect me:banghead:



It will cycle even with the system off. Itís cycled to 12v hot. So you would need to turn off battery cut-offs.
Two things: wire a switch into system as previously suggested or adjust the time or interval. Itís in the manual. I think every 8 hours is the max.

windsorbill 02-02-2018 03:51 PM

Quote:

Originally Posted by dverstra (Post 4019681)
Not sure if I described that correctly in the title. We are sitting at our site in the campground. I leveled the coach with the HWH Air Leveling System. I have the dual Air/Hydraulic system option. Every 20 to 30 minutes there is a small compressor near the back axle that cycles ON for about 30 seconds. It does this whether I turned the power OFF on the Leveling System or not. It also does it if I level the coach with hydraulic instead. I think it does it a less often if I hydraulic level the coach. It is annoying since it is right under the bedroom area:eek:. Any thoughts? Lack of sleep is starting to affect me:banghead:

Did this just start doing it? You may have a leak, but Monaco plumbed many coaches wrong and the symptoms are exactly what you are describing.

Basically they put a check valve between the air switch and the tank. The check valve should isolate the compressor only.

If you post a few pictures showing your compressor output and the line leading to the air tank, it's easy to identify and see if that's your problem.

windsorbill 02-02-2018 03:56 PM

Quote:

Originally Posted by 10Boomer (Post 4020055)
It will cycle even with the system off. Itís cycled to 12v hot. So you would need to turn off battery cut-offs.
Two things: wire a switch into system as previously suggested or adjust the time or interval. Itís in the manual. I think every 8 hours is the max.

Perry,

I know you had a bad air switch in QZ, but if we only replaced your switch and didn't re-plumb your system, I think you would be having the same issue as OP.

10Boomer 02-02-2018 08:15 PM

Quote:

Originally Posted by windsorbill (Post 4020144)
Perry,



I know you had a bad air switch in QZ, but if we only replaced your switch and didn't re-plumb your system, I think you would be having the same issue as OP.



No the Captjake1 replumbed and I believe can be the resident expert now! He did 2-4 coaches at QZ. Every time I saw John he was dusty!🤣

Randyman1 02-02-2018 11:49 PM

Look in the left front corner outside compartment. Thatís where my fuse/circuit breaker was. I pulled it out as I didnít like the noisy compressor either. My coach will remain aired for months without needing any air. When it does finally seep off enough, I just put the fuse/ cb back in and let it build the air up and then relevel. Remove the fuse again until next time itís needed. Simple fix.

S-n-L 02-03-2018 12:05 AM

Same thing happened to me. I pulled the fuse in the front run bay. Located on my coach outside and below the drivers seat. Once the leak was fixed I put the fuse back in.

When I had the leak I would air up the coach with the engine, level the coach then turn off the leveling system at the key pad. The coach would stay level for weeks.

saddlesore 02-03-2018 12:11 AM

Question...
Do you have the Thomas Compressor?
If so check the "pop off" valve (pressure un-loader valve) on the compressor.. they do go bad and will leak.. (btw it is rather expensive for what it is)
Also if you have the "bladder type" HWH slide seals, when they develop a leak will do the same thing.

Bill767 02-03-2018 06:16 AM

Monaco installed a ton of these wrong with the check valve near the air tank instead of at the compressor, so if the pressure in the line went down the compressor would start. Our coach was wrong. Also the fuse is in the front run bay, high on the right side looking in, it is a self resetting fuse so looks kind of like a gold rectangle. I fought the placement of the compressor in all the road dirt and finally moved it inside the basement where our Aqua-Hot is located, there was enough room and was an easy fix. Now it operates like it should. Your description sounds more like you have the Valid leveling system like we have, and in that system the power to the compressor is always on. If the check valve is the right place and the pressure switch is good then the compressor will run when the coach needs air to level. When set on auto it will keep lowering the coach to remain level every couple of hours or however you have yours set, but if it finally needs to raise a corner to level, it will cause the compressor to come on. Ours will come on once every day or so.

dverstra 02-03-2018 04:21 PM

Quote:

Originally Posted by Bill767 (Post 4020888)
the fuse is in the front run bay, high on the right side looking in, it is a self resetting fuse so looks kind of like a gold rectangle.

Bill767
Thanks for the location of the fuse. Great description. I found it right away and pulled that baby out. I'm ready to sleep like a baby tonight!!:dance::dance::dance:

dverstra 06-23-2018 08:05 AM

Well, I finally found this leak. The intake of the air compressor itself leaks. Sometimes a lot. Sometimes a little. Sometimes not at all. Arghhh. There must be a check valve in the head of the compressor that is allowing air out. The small filter doesn't have that valve in it, does it? Am I about to replace that noisy compressor? Is there a quieter option available?

windsorbill 06-23-2018 10:45 AM

Quote:

Originally Posted by dverstra (Post 4254871)
Well, I finally found this leak. The intake of the air compressor itself leaks. Sometimes a lot. Sometimes a little. Sometimes not at all. Arghhh. There must be a check valve in the head of the compressor that is allowing air out. The small filter doesn't have that valve in it, does it? Am I about to replace that noisy compressor? Is there a quieter option available?

A few owners have moved the compressor into an outside compartment to get it out of the weather. When they are mounted towards the rear axle, they susceptible to splashing and road debris.

If the compressor still cycle on/off for a short period of time, it's likely it's plumbed wrong. Monaco plumbed many of the coaches with the compressor up front (windsor, camelots, some beavers) incorrectly. It's a pretty easy fix and has good results.


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