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06-21-2021, 03:17 PM
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#1
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Senior Member
Join Date: Jul 2009
Posts: 623
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Left side air bags won't inflate on start up.
I'm lost as the left side won't come up and the right side is high. This happened after not using the coach for two weeks, every thing was fine when I parked it.
any help would be great. The bags dump fore and aft so this right left thing has me baffled by the way this is a eight bag Roadmaster chassis.
Thanks John
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John, Pat and the cat named Missy
2011 Winnebago VIA T
HONDA 2015 PILOT in tow
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06-21-2021, 03:25 PM
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#2
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Senior Member
Join Date: Dec 2016
Location: So Cal
Posts: 1,368
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Have you checked the air ride leveling valves? The arm may have come unattached to the rod connected to the axle. On my coach I have one per side for a total of 4
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2000 42' BEAVER MARQUIS AMETHYST w/tag 2 SLIDES CAT C12 425 hp SOLD.........
2014 Tiffin Allegro Bus 37AP
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06-21-2021, 03:47 PM
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#3
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Senior Member
Monaco Owners Club
Join Date: Jul 2018
Location: Kitchener, ON, Canada
Posts: 609
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Hi John,
Couple things comes to mind. As already mentioned, could be an issue with the ride height air levelling valve. Should be 2 valves at the rear, and 1 at the front. The 2 at the rear are responsible for setting the ride height side-to-side.
Do you hear air leaking out? Not sure if you have an air leveling system, it could be one or more of the solenoids stuck open on the 6 pack.
Could also potentially be a Pressure Protection Valve (PPV) that the left side air bags are connected too, that is not opening at the cut in pressure and providing air to the bags. Typically, I believe the front and rear bags will also be on different PPVs, so seems unlikely it would cause an entire side not to inflate. But thought I would mention it just in case.
If you do not hear a major air leak, I think a good chance that 1doodadd is right and it has something to do with the air leveling valve.
All the best,
Josh
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06-21-2021, 03:56 PM
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#4
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Senior Member
Join Date: Jul 2009
Posts: 623
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Thanks guys
Ill check out the rear ride control tomorrow.
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John, Pat and the cat named Missy
2011 Winnebago VIA T
HONDA 2015 PILOT in tow
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06-21-2021, 04:31 PM
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#5
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Senior Member
Monaco Owners Club Coastal Campers
Join Date: Mar 2012
Posts: 2,163
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Not familiar with your model air bag manifolds. I wouldn’t think suddenly both ride height valves failed. I would guess the rear drivers side leveling arm by the axle came off.
Can you raise it manually?
You can disconnect the valves and check their ohm value to see if they failed.
Don’t get crushed in the process. Just unplug each valve electrical plug on the manifold and check it’s ohms. Block the frame anytime you are under it.
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Jeff
2001 Monaco Dynasty tag axle
2018 Jeep Grand Cherokee
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06-21-2021, 04:36 PM
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#6
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Senior Member
Join Date: Oct 2014
Posts: 7,867
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4 ride height valves are possible (our last coach, an Alpine had them) but EXTREMELY rear.
3 are much more common.
If solid front axle, normally two on the rear axle, one in front.
If IFS normally two in front, one in back.
Totally agree, you need to check your ride height with the coach aired up and jacks stowed/air leveling in travel mode.
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Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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06-21-2021, 05:20 PM
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#7
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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I don't think one problem can cause both front and rear left side air bags to not inflate. Are you sure the front isn't inflated?
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Dennis and Katherine
2000 Monaco Dynasty
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06-21-2021, 09:23 PM
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#8
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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One travel height valve on the left or rt controls the lean. I didn't know an Ifs had two front and one rear.
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06-22-2021, 07:39 AM
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#9
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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Quote:
Originally Posted by shootist
One travel height valve on the left or rt controls the lean. I didn't know an Ifs had two front and one rear.
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Either way, there’s not one device that controls both the front and rear air bags on one side is there?
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Dennis and Katherine
2000 Monaco Dynasty
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06-22-2021, 07:43 AM
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#10
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Senior Member
Join Date: Oct 2014
Posts: 7,867
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Quote:
Originally Posted by barmcd
Either way, there’s not one device that controls both the front and rear air bags on one side is there?
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With three ride height valves, indeed that axle with the two valves DOES control total coach lean. The axle with the single ride height valve can only "average" ride height if the ride height valve is in the middle of the axle as is commonly the case.
Please start by verifying that your rear ride height valves (assuming the rear axle is the one with the two ride height valves) IS to spec.
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Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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06-22-2021, 01:24 PM
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#11
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Senior Member
Join Date: Jul 2009
Posts: 623
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thanks
I cant wait to get busy working on the things to look at unfortunately its raining here today and tomorrow so no crawling under the rig till it stops
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John, Pat and the cat named Missy
2011 Winnebago VIA T
HONDA 2015 PILOT in tow
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06-22-2021, 02:28 PM
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#12
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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Quote:
Originally Posted by wolfe10
With three ride height valves, indeed that axle with the two valves DOES control total coach lean. The axle with the single ride height valve can only "average" ride height if the ride height valve is in the middle of the axle as is commonly the case.
Please start by verifying that your rear ride height valves (assuming the rear axle is the one with the two ride height valves) IS to spec.
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You’re making my point. He said none of the left side air bags are airing up. I take that to mean front and back axle. There’s no way one issue causes both front and back to fail to inflate. I was trying to pin down the actual symptom.
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Dennis and Katherine
2000 Monaco Dynasty
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06-22-2021, 08:47 PM
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#13
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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Quote:
Originally Posted by barmcd
You’re making my point. He said none of the left side air bags are airing up. I take that to mean front and back axle. There’s no way one issue causes both front and back to fail to inflate. I was trying to pin down the actual symptom.
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The front follows the back. If it didn't the windshield would crack. The front the air just transfers side to side. Not sure of the six-pack control over it but it doesn't try and level when airing up like the rear as far as I know.
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06-23-2021, 06:28 AM
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#14
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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I know how the suspension works. I’ll try one more time to explain what I’m asking.
He said the left side air bags aren’t inflating. To me that means the left side air bags, both front and rear are flat. I have a slow leak somewhere in my right rear air bag line. After 3 days the right rear sags, but the right front is still high. The coach has a visible droop to that corner. That is different than the whole left side not inflating as described. I was trying to find out from the OP if that is truly the case. Like I said previously, I don’t see one problem causing the front and rear left side to not inflate because they are inflated and controlled from different tanks and valves.
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Dennis and Katherine
2000 Monaco Dynasty
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