Thanks j-d. The shocks are the model that Koni specs for my chassis. Looking at the suspension in the rear after your comments, only the air bags and shocks limit the extention travel and it looks like the shocks would top out first resulting in the piston rods being pulled out of the shock body.
Piss poor design since sometimes the rear wheels are off the ground in order to level the coach. Re: the warranty, I am told these are broken so likely not covered. The cost of shipping to Koni and the hassle is just not worth it.
The Konis really improve the ride of the coach so I guess in future I need to be more cautious of the road conditions to avoid topping out.