Air valve

[gary85]

My'99 40FDS has developed a constant air release from the valve located inboard from the right front wheel and mounted to the frame. This valve is connected by a rod to what looks like a sway bar. What is this valve called and what are your suggestions?
Thank you.

[gary85]

My'99 40FDS has developed a constant air release from the valve located inboard from the right front wheel and mounted to the frame. This valve is connected by a rod to what looks like a sway bar. What is this valve called and what are your suggestions?
Thank you.

[Dave Fernandez]

Hello Gary:

The valve you are talking about is called a ride height control valve. It is adjustable and WRV can send you info on how to adjust it properly. Or you can get a 7/16 inch wrench and loosen the nut and move the adjustment arm slightly in order to stop the ride height control valve from letting air escape. That is what I did on my 2001.

[Dale777]

gary85,

If I correctly understand what you are describing, it sounds like the air valve is the one for distributing air to the right front air suspension bag. There is a vertical rod with one end attached to the axle (or sway bar - not sure which) and the other end attached to a horizontal bar which attaches to an air valve (Height Control Valve)for adjusting the amount of air in the air bag.

I suggest you confirm whether the air valve is bad and, if so, replace it. I believe the front air suspension for your model year might have been the Neway AS120. Neway is apparently part of the Holland Group now. See this link for literature for the Neway AS120 (page 8 has the diagram for the Height Control Valves):
Neway AS120 Maintenance manual

Dale
In between - 2001 Alpine 38FDDS and new 2006 Alpine 36FDTS

[Richard and Cris]

My 98 did it too. I replaced the left front ride height control and it stopped. Now it is hissing again but seems to be just the exhaust valve when that wheel is parked on the low side of vehicle. Can be stopped by adjusting the arm but that is how you adjust the ride height so it will be changed also. Needs to be checked on level ground.

[gary85]

Thanks for the replies. I was afraid I broke something after a particularly severe "porpoising" episode. Porpoising, I am told, is the rythmic bouncing of the front end while traveling on older sections of concrete highway. A trucker friend told me that to stop this, just pull halfway off the road. I'll try this next time. Is this an indication of worn shocks or is this occurance normal? I have an appointment at a chassis shop in June to go over the frame, shocks, etc.
Again, thanks for your help.

Gary