Ride Height Control Valve Lever Arm Adjustment

[BRex45]

Ilvmygt:

For my '97 Intrigue, which also uses the 90555105 Haldex valves, the lever length from the point where the lever bar is tightened by the small set-bolt on the valve body, to the point where it connects to the vertical rod/rubber boot, is 7 1/2".

I think some people on this thread might be confusing ride height adjustment (vertical rods with the clamp/boot on one end) with the horizontal lever bar that swivels on the valve)

[Ilvmygt]

Thanks you that is the information I was looking for.

[TR4]

This is from an email from Haldex;

Bill,

The length is going to be determined by where your vertical rod mounts to your axle. In order for the valve to keep accurate control over ride height, the angle between the vertical and horizontal linkage needs to be 90°. Once you set the vehicle to your manufacturers recommended ride height, pin the HCV to prevent it from altering your ride height setting. Then install the rubber connector to the hooked end of the horizontal linkage as shown in the picture. Slide the straight end into the height control valve until you create a 90° angle with the vertical linkage. That is how you will determine the length of the horizontal linkage.

Kyle Hinton
Technical Advisor

Toll Free: 800-643-2374 (press 2)
Direct: 816-801-2727
Fax: 816-801-2879

Haldex Brake Products Corporation
10930 North Pomona Avenue
Kansas City, MO 64153
USA
[url]www.haldex.com[/url

[bneukam]

Bill,
Good info to know, and if that’s the case then both sides would not be the same measurements, because ride height settings will never be the same on both sides.
These ride height valves are not the best quality, IMO. I noticed even after 10k miles response was starting to lag, and needed adjusting to compensate. The worst part is once you know how to adjust these, your always looking to improve handling by fine tuning them.
Brett

[BarneyM]

Originally Posted by Ilvmygt

I replaced the Ride Height Control Valves (RHCV) in the back on my 2000 Magna with Haldex 90555105 valves. When I removed them I noticed the Lever Arm length was different from side to side. One side was set at 6 inches and the other set to 5 inches. This is the distance from the RHCV to the rod attached to the rear suspension. Based on a visual inspection of the old RHCVs it looked like the one that was set to 5 inches had been replaced in the past. I assume they should be the same length. I set them both at 6 inches.

Any one know what the correct Lever Arm length is for a 2000 Magna? Or the formula for determining the length?

The ride height valves that came from the factory on your motor home had a fixed length arm installed. When a new valve is installed the fixed length arm should have been transferred from the old valve to the new one so there is no question as there is no adjustment possible. If you still need this info I can climb under my coach and measure it for you as mine are the fixed length arms. Let me know.

[Ilvmygt]

All three RHCVs on my coach have adjustable horizontal lever arms. Maybe someone changed all the RHCVs in the past, however the 2 valves I replaced were metal and one had a riveted P/N tag on it. The other RHCV has a sticker with the P/N, different hardware and the short horizontal lever arm which leads me to think it had been replaced.


The coach has a Ridewell 227 suspension. I found and reviewed the Owners manual. The "Ride Height / Height Control Valve Adjustment" OPERATION section has the following statement:


"Optimum performance is achieved when valve is adjusted accurately to the suspension by increasing or decreasing horizontal lever arm length to a point where valve and lever arm approach 45 degrees maximum up or down from neutral position."


Currently both horizontal lever arms are set to 6 inches and ride height has been adjusted. I made a 45 degrees gauge. With the air bags (springs) deflated, the horizontal lever arms are very close 45 degrees. This tells me that RHCV that had the 5 inch horizontal lever arm would have put the valve out of range.



In that same section under ADJUSTMENT there is no mention of the relationship between the horizontal lever arm to the vertical link. Next time I start the coach and get it to ride height I will check to see how close to 90 degrees the horizontal lever arm is to the vertical link. Although the 90 degree relation may be ideal the 45 degree maximum up or down is a technical requirement of the valve.


Based on the discussion here believe I have correct geometry of the Ride Height Control Valves.