While you may have a faulty hose clamp, I suspect the problem is likely due to a very hot engine being shut off. My suggestion is to let the engine cool off for a few minutes after stopping before letting it shut off. While the ICE is running, put the FEH in neutral. Neutral will prevent the ICE from shutting off (or starting if it is off when you put it in neutral!) and let it idle for a few minutes.

I have towed horses for years with an F150, and always let the engine/tranny cool off by idleing a few minutes after a long trip. Still have the same engine and tranny in the truck (no rebuilds) after 250,000 miles

I have an '05 FEH and have climbed Sonora pass in the summer without a problem. Sonora pass is in central California and is a steep climb of 10 to 15% grades, with sections of 26% going up and down from the summit at 9624 feet Quite a climb and the FEH handled it great loaded with camping gear and two adults!