My latest problem

[VanTare]

Sojourner  My H-45 drops the air from all 8 air bags then levels itself from 4 corners and this the 3rd one I  have owned that operated in this way.It does use the 3 point for travel but where is the stress going to be from a frame floating on 8 air bags.Back to John316  the only problems I have had with leaning was because of the check valve or the exhaust valve fwiw  

David

[Sojourner]

BTW, the "whole system" means our gauges on our dash. Our duel tanks (well there is four, but it has a primary and secondary tank) bleed down over night, with out being able to hear anything. I will check the brake relay, and treadle.

John...there is a check valve before each tanks (prim & sec) after wet tank. With engine or air compressor shut off, drain wet tank...till it drained and listen for hissing air still coming out of drain valve. If it is...you have a leaking check valve to one the dual tank.

Rear relay valve have a supply line from one of dual tank and some dual system has no supply line to front relay valve but only when the foot valve after it depressed. So if you hear or see leaks...let us know via posting. We can try to walk you step by step....there is multiple check valve in the circuit as well relay it self to cause the leaks.

If it the foot valve leak from exhaust port...let us know.

FWIW

Sojourn for Christ, Gerald

[Sojourner]

Sojourner  My H-45 drops the air from all 8 air bags then levels itself from 4 corners and this the 3rd one I  have owned that operated in this matter.It does use the 3 point for travel but where is the stress going to be from a frame floating on 8 air bags.Back to John316  the only problems I have had with leaning was because of the check valve or the exhaust valve fwiw  

David

The front suspension of H-45 has 2 levelers...one for driving and the other for kneeling. They are both connected to a tee connect to both front sides of dual air bags. So if one of 2 wheels is in a lower point then the other wheel to equal out the pressure via a tee fitting to maintain equal ground contact pressure at all 4 points.

The rears air bags are the only ones to control both the side tilt and the fore/aft tilt. The front air bags are to maintain the adjusted height setting by one leveler valve and only one leveler valve at a time.
MCI's are the same way.

FWIW

Sojourn for Christ, Gerald

[pvcces]

Hi, Gerald.

I thought about what you said about the levelers being affected by movement of the coach while sitting.

I think you might be right about that when you first shut down the engine. However, it seems to me that if the body is down by a fairly small amount, the valve will only open to the supply, not the exhaust. If the check valve on the supply side of the valve is good, and the system pressure has dropped, as most do, then no air will flow into or out of the airbags.

This is the only way that it makes sense that a coach could set outside for months without settling down. We have one corner that goes down, but the other two valves keep the air in for nearly three months between uses. I think that the norm is that they are supposed to hold air for a long time.

In this case, the duration of the valve delay has little effect on the loss of air from the airbags.

John, if you can't hear any leaks, you might get a youngster to listen. That can really speed up your search for leaks. Just don't let the youngster go anywhere he might get hurt!

For what it's worth.

Tom Caffrey

[John316]

Gerald, thanks for your posts, they give me some good places to start.

Tom, I will get somebody else to listen. Thanks.

God bless,

John

[VanTare]

Sojourner
I know how my coach leveling system works  you flip the switch it goes to a low level postion the on board compressors (2) level from 4 poinits while using the tag also,the coach is equipped with the" BUOY" high and low for the Front and Rear you can let the coach down to clear objects or adjust for high winds.This is all I will say about this topic but it is my coach and I know how it works   

David

[luvrbus]

Gerald and David ,that is the Active Air System made by HWH a 4 point leveling system best on the market so I am told I have a friend with a H3-45 VIP that has that system. It is approved by Prevost, MCI and all RV manufactures so I guess the 3 point only theory is not allways the case  good luck

[PP]

Well like I said, I have a hidden air bag that I didn't even know was there on my H model. Not sure what or how others are built! Yours may be different!

Ace

Good day Ace,
I have come to the conclusion that our buses are different. I just froze my A.. off crawling around on frozen tundra in search of the elusive air bag(s) to no avail . I was mainly concerned that I may not have replaced all the bags, but I did . There is a bag in front of each drive and another between the drive and tag. The cylinder (not a bag) is behind the tag and raises and lowers it. I haven't checked any of its fittings for leaks yet-too da.. cold to be playing with water. I'll get back under when the weather warms up. But I doubt if my problem is connected to it, since the air only seems to leave the right-hand bags in the rear. The front and left hold air fine-the front even more so, as the rear will eventually go down over the span of a few weeks while the fronts hold air for ever. I guess that shoots the moving around inside and wind theory all to Heck Sorry Gerald, I was really hoping it was something that couldn't be fixed and had to be lived with-got enough other projects going on at this time to be adding to the list Thanks again and stay warm, Will
BTW Ace, my wife read the post and your tag line "Babes, etc", she laughed the whole time I was freezing my arse off for taking you serious