mc9 kneeling problem

[tombuchanan]

i'm from wisconsin and us coach doesn't appear to offer online purchases.  any thoughts for online sources?

[lovetofix]

i'm from wisconsin and us coach doesn't appear to offer online purchases.  any thoughts for online sources?

Everything is done over the phone including payment. Luke is awesome to work with, just wait till after 9:00am eastern tomorrow and give him a call. +1 (856) 794-3104
I am from TN and usually get the parts in 2-3 days.

[richard5933]

i'm from wisconsin and us coach doesn't appear to offer online purchases.  any thoughts for online sources?

We're also in Wisconsin (Waukesha County). Luke is the best game in town. Call and place your order with him directly. You'll have your parts in a few days - sooner if absolutely necessary.

[luvrbus]

Any good truck supply in your area ,leveling valves are mostly genic now

[tombuchanan]

ok I got a new replacement height control valve to replace the one that was leaking through the exhaust port and it does the same thing.  As soon as the rear reaches pressure, the passenger side goes up like 8 inches (wheel to chassis) and it leaks like mad out the exhaust port.  I didn't think the control shaft was turning on the old one, but after taking it off, I noticed it was made to lag a little so it probably was working fine and i didn't notice from under the bus.

[lovetofix]

Does your bus have any kind of manual leveling system on it from a previous owner? Like what you would use to level the bus when parked.
It sure sounds like you are getting air into the passenger side suspension system from a source other than the leveling valve. When that other source does not stop it goes too high and the leveling valve is trying to do its job and bring it back down, but cannot exhaust fast enough.

[tombuchanan]

i've attached pictures of several push button switches that I don't know the function of (other than dimmer switch) that I may have pushed but I don't see any toggle like switch that could act to control leveling.  the only thing i know i pushed around the time it first happened was the kneeling toggle but i may have pushed one of these other switches.

[hogi6123]

The forward foot switch should be for toggle low/high beam, or maybe toggle headlights/foglights (my bus has both).

The rearward foot switch I'm pretty sure should be the air horn.

The small box with a switch I don't recognize.  I can't see enough to tell where it's attached.  It might not be original.

If you disconnect the line from leveling valve -> air bags, and start the bus, does air come out of the line from the air bags?  If so, lovetofix is correct that it's entering from another location.

[tombuchanan]

Problem solved!  I was able to find another air line going into one of the bags and traced it to a valve located by the water tanks.  Apparently, a previous owner had installed it as a way to manually raise the passenger side maybe to help drain the tanks.  I remember seeing it a few weeks ago when I was fixing some busted pipes and opened it up thinking it was a water drain or something.  So anyways, thanks so much for the advice.  I feel a little stupid knowing so little about this bus but you guys have been awesome in throwing out ideas.

[hogi6123]

Funny!  Glad to hear you figured it out.

[lovetofix]

I am still in the learning and repairing phase with my bus too! The awesome thing about this forum is being able to share the things we've each learned from our experiences. Some on here like luverbus have a lifetime of experience with buses and they so kindly share it with newbies like me.

I have yet to take my bus on the road. I drove it home 30 miles and am going over the brakes, steering, entire air system, cooling system, engine, driveline, etc. rebuilding or replacing all mission critical components to bring everything up to date. I absolutely love the learning process, and the mechanical control systems make it so much easier to troubleshoot with basic tools and old school experience.