[Richard]

Greg,

I am sorry for my late reply. Your leak rate, although excessive is not a blown seal. With a blown seal you can not build enough pressure to flush the potty.

I was going to suggest that you try the all raise button. I am glad you did because that eliminates the air bags and seized suspension as culprits.

You have isolated the problem to one of two areas. The first is the HCV, the second may be a stuck travel solenoid.

As Carl said Newell used ping tanks which add air volume to the spring system but slow down the response time. Also, some HCVs have slower response than others. I use the king of the road valves from Dayton which have a very slow response but tight tolerance.

Here is a trick that will save you many trial and error headaches. Because the HCVs have some freeplay or hysterisis in them you can get varying ride heights. The best technique when measuring ride height is to lower the coach below travel height and then put the coach in travel mode and let it raise to travel. You will get consistent results doing this. If you raise the coach to gain access, and put it in travel to check ride height you will get inconsistent results.