Hadley ride height valves?

Anyone had experience with Hadley ride height valves? When they are new, they have no side-to-side play where they pivot. On my KW and converter dolly, they've now got a considerable amount of play. I've bought four new ones but haven't really got time to fit them until I've done the next trip. Have they been known to break? They aren't leaking air.

 

That's what happening to the KW. It's got right and left hand valves which makes it worse. I'll see if I can change the ones on the KW today. On the dolly it's not so bad, it's got valves for the front and rear axle.

 

All KWs in Australia run two valves and always have done. I was at a KW dealership last week and all the new trucks waiting on pre-delivery were running Hadley valves like mine.
Probably because some of our back roads have got huge cambers and can be in bad condition. Once you're out of the cities the roads can get pretty bad. With fast acting valves like the Hadley the truck seems to stand up better on bends. I've got an idea Mack and Western Star might run two if you option them. Not sure about the other brands.