Never use the bucket to pull, don't hook chains to it and try to pull out logs, use the drawbar on the rear for that. Hooking chains to it to "Lift" something is fine, never pull.
Sideways pressure is bad on them, for example I had a big azz round bale in my truck, I was starting to use the FEL and cut the wheel to push out the bale from the side of the truck, I didn't put much sideways pressure on it and stopped, I was a afraid of twisting the FEL frame.
If I didn't read on here about things not to do, I would have ignorantly just pushed the bale off that way but I stopped.
Another thing I find myself doing from info I picked up off here is kicking it in 4wd going down hills with my round bales, I remember a few stories of guys putting holes in barns because they were in 2wd and the rear got too light on them and away they go lol.
In 2wd only the rear locks up, in 4wd all 4s break.