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General Discussion of preventative/corrective maintenance and other technical issues regarding your coach that are not covered in other Mechanic's Corner categories (ex. refrigerators, water heaters, and compressors).

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  #21  
Old 11-05-2011
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giderich giderich is offline
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The WM90DX throttle valve has an exhaust port, although I'm guessing the exhaust is not plumbed to the tube in question.

http://williamscontrols.com/products...ls_catalog.pdf

The WM90DX Pneumatic Regulating Valve, listed in the catalogue above, is used on some BBs for the air operated throttle.
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1999 43 LXI Single Slide Body # F124510
2005 JEEP Liberty Limited CRD (diesel Toad)
SOLD 89 FC in 2012; SOLD 88 WB in 2016
Rolla, MO 65401
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  #22  
Old 11-05-2011
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ahhh!
so,he need to step on the go pedal a few times and see if that helps?
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  #23  
Old 11-05-2011
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Well,

I went out again, and tried pumping the air throttle, service brakes, stair step, and everything else that I could think of, but I still couldn't get any air to blow out of that vent line on my coach.

So, I decided to try again and see if the vent I found on my coach is the same line as the original poster.

Here are two pictures. The first picture is the original poster's air line, that blows a ton of air whenever his coach is aired up. The second picture is of my coach. I tried to get a picture from what I believe is the same angle he used to take his picture. You can see my vent line in the background, with a q-tip sticking out of it. I drew a green line to indicate the direction the line travels on my coach.

At this point, I still think the original poster needs to trace out that line, as well as cycle his air operated items. Since I can't be 100% sure my vent line is the same as his, AND cause I don't seem to be able to get mine to vent anything, I don't think I can offer any more help till we get more info from him.
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  #24  
Old 11-05-2011
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Quote:
Originally Posted by RGloverii View Post
Well, whatever that "vent line" does, I was unable to get it to vent any air. I cycled every air operated device in that area that should be venting air, including...

Front air vents
susp dump
parking brake

Whatever it does on my coach, for now, I'm stumped as to how to activate it.

I think the original poster is going to have to trace out that line and see where it's going. Also, compare my picture to what you see on your coach. Are we looking at the same line??
Robert, Randy,

Could it be the vent from the brake or throttle treadle valves????
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  #25  
Old 11-05-2011
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Quote:
Originally Posted by Bill Pape View Post
Robert, Randy,

Could it be the vent from the brake or throttle treadle valves????
OOPs I did not read the previous posts. the plot thickens, Where is Sp Rick when Ya need him??
He is up on the hoist.
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  #26  
Old 11-05-2011
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Very odd indeed.

Without the original poster providing some additional detail, or another '89ish SP to compare with, it looks like we're just spinning our wheels. It's quite possible that my '91 SP has different air runs than the '89 and all that I have done so far is invalid.
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  #27  
Old 11-05-2011
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Robert, Randy,

I have no further ideas.

Robert
Where is the Bendix air operated Cruise Control on the SP ???
On my FC it is under the driver seat floor, I can hear the air dump exhaust, if I have the side window open.
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  #28  
Old 11-05-2011
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Bill,

I have thought about the Bendix cruise control, and as far as I know, all of the air components for it are in the rear. Unless I'm mistaken...

Where does the air exhaust out from the ride height control valves? Could that be what this is coming from??
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  #29  
Old 11-05-2011
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Quote:
Originally Posted by RGloverii View Post
Bill,

I have thought about the Bendix cruise control, and as far as I know, all of the air components for it are in the rear. Unless I'm mistaken...

Where does the air exhaust out from the ride height control valves? Could that be what this is coming from??
The ride height valve, only one up front in the center of the coach,
It has a very short plastic exhaust hose , also the dump valve but I do not think it has copper tubbing attached. My dump valve is closer to the passenger side , it may be on the driver side in the SP ???????
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  #30  
Old 11-05-2011
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Each Height Control Valve has an exhaust port on the valve body itself...and a short (approx. 4") length of tubing to vent the expelled air into the atmosphere.
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1999 43 LXI Single Slide Body # F124510
2005 JEEP Liberty Limited CRD (diesel Toad)
SOLD 89 FC in 2012; SOLD 88 WB in 2016
Rolla, MO 65401
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