Was at the local dealer the other day --- they're unloading and setting up the new models for this Spring and Summer season.
While we were kicking the tires on the new stuff, I happened to see the neighbors new (last summer) JD5420 with cab and 542 FEL. Sweet hay-baling, MoCo machine!
As I walked around the machine, I noticed that the air filter at the top of the cab was kinda hanging out and noted that it was crushed -- heck the whole top edge of the cab was crunched! But there wasn't a single broken or even cracked window in the whole cab!
Then we noticed that the tire next to the crunched side of the cab had slid in towards the cab -- the other tire was offset further out on the axle.
I mentioned it to one of the mechanics and he said that the owner had laid the tractor on it's side while feeding a large round bale. The bale was low to the ground but on a side hill with snow and ice and the tractor slide over in SLOW motion and just layed down.
They had it in the shop to completely replace the cab --- luckily, he figured the FEL was still straight and would not have to be replaced but they were gonna go through the whole tractor and see what needed to be replaced.
I'd bet that the inside rear wheel was toast, too!
Anyway, the point of this is --- the CG is higher on a cab tractor vs an open station. Can't change that simple geometry.
All tractors can roll and the greatest, most important safety feature is Operator caution.
LWB -- I was doing the same thing last week with my tractor. Backing up onto the huge snow piles in my pasture to drag the tops down with my 84" rear blade so they would melt sometime before July. Mixed with horse manure, they melt real slow, otherwise.
I kept the FEL low -- just above the snow and backed up in a straight line (tires square with each other) with the rear blade just off the snow, too.
Sittin' up there 5-6 feet is certainly a time when your senses are focused!
AKfish