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Old 09-22-2012, 12:59 PM   #1
YC1
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Ride Height old subject still foggy

I understand what ride height is and adjusted my valves long ago which improved the handling 100%. I believe I have hadley valves. There are three valves on my 8 bag chassis. What I have not been able to determine is how or if the valves are (recentered) once the height is set. Reading about using a drill bit to hold the thing in place while tightening is not clear at all. I have looked for a you tube video as others have but have not found one. I have not found one picture that clearly shows how to adjust these valves.

After setting the ride height, and it may have done this before, I can hear it go pssst, psst as I hit little rollers in the road. Or when climbing in and out I can hear it doing the same thing. This may be normal now that the height is set. If it is just adjusting to the weight change that is ok.

So someone that has a picture or video there are some of us that would love to see them.

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Old 09-22-2012, 01:14 PM   #2
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I never really understood the whole drill bit in the pinhole instructions. I think that is to make sure the valve doesn't move while you are tightening the nut. When I adjust mine I don't use the bit method anymore. I just hold the valve firmly while tightening the nut once the height is set. As for your comment on the sound mine does the exact same thing including stepping in and out of the coach.

Perhaps someone else will chime in with better info, but your experience is same as mine.
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Old 09-22-2012, 01:46 PM   #3
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Thanks Craig. I never could figure out how the drill bit was supposed to hold it. What a difference it made though. My ride height was at least an inch low in the front and the coach would waddle up and down like a sick whale. After adding sway arms this thing really handles well.
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Old 09-22-2012, 09:32 PM   #4
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once height is set proper....the height valve needs to be "centered" so it has enough up and down movement to travel with the suspension as it works up and down. The drill bit is for making sure the valve is centered. This way the valve can not stop due to being out of travel, while the suspension is still traveling. The valve should be center when suspension height is set to proper measurement
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Old 09-23-2012, 11:51 AM   #5
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Quote:
Originally Posted by sc3283 View Post
once height is set proper....the height valve needs to be "centered" so it has enough up and down movement to travel with the suspension as it works up and down. The drill bit is for making sure the valve is centered. This way the valve can not stop due to being out of travel, while the suspension is still traveling. The valve should be center when suspension height is set to proper measurement
To my original question: Just Where does the drill bit go and what does it do? I have not seen anything that I would consider a centering hole. I sure could use a picture as do others that have had this question numerous times. I guess I will crawl under there and take a picture myself and post it. Then you can help me nail it down.

Thanks for the replys. Please check back often.
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Old 09-23-2012, 12:04 PM   #6
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Try this one:
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Old 09-23-2012, 04:17 PM   #7
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Thanks Rex. Not my valve. My generator has been running so it is too hot to crawl under there and take a picture.
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Old 09-23-2012, 08:58 PM   #8
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Quote:
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Try this one:
Rex, I think this diagram is for the Haldex valve. Mine is the Hadley valve, and I have never been able to find an accommodation for the dowel pin. The arm that bolts to the valve has an adjustment slot at the nut. I simply loosen the nut, adjust the arm to the right position and tighten the nut.

The Hadley valve is heavily spring loaded to sit in the neutral position. That's the position the valve has to be in when the arm is bolted to it. That's the ride height. If the valve arm is lifted (coach trying to go lower than ride height), the valve will let air pressure in to raise the front of the coach. If the valve arm is lowered (coach trying to go higher than ride height), the valve exhaust air to lower the front of the coach.

My 1995 Dynasty is listed as having Haldex valves. My coach was built in Indiana, and has the Hadley valves. They are not directly interchangeable without making bracket modifications. Ask me how I know. I drove to California with malfunctioning air valves (2500 miles). I took it to a shop in California that ordered new Haldex valves according to the make, manufacturer, year of our coach. When the Haldex valves arrived, they discovered the difference in the valves. When they considered the work required to change over from one brand of valve to the other, they special ordered the Hadley valves.
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Old 09-23-2012, 10:08 PM   #9
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Thanks Jim. This could be like me looking for the place to lube the exhaust brake. Pac Brake I believe. No such animal on my 2008. I even bought the special oil. The variable ratio turbo handles the issue. So I may be chasing a ghost here as well. Once I get a picture I will post it. It sure rides and handles better with more air than it had.
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Old 09-24-2012, 05:44 PM   #10
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Here are some pictures of my valve.
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Old 09-24-2012, 08:20 PM   #11
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Looking at your pictures. Your valve is nothing like my valves. Are you sure it's a Hadley valve? I don't think the procedure I previously discussed for adjusting my valves will work for adjusting your valve. I'm not sure how you would adjust your valve.
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Old 09-25-2012, 09:27 AM   #12
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Those don't look anything like mine
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Old 09-25-2012, 09:30 AM   #13
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I guess I am just Spacial. I will do some more research on the valve.
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Old 09-25-2012, 09:58 AM   #14
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YC the hole directly above the nut attaching the lever to the valve...possibly the centering hole?
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