Will my 1973 JD 310 pick up a 5k log and load on trailer using boom?
Don’t know about that machine but if you can’t pick it all up, maybe you could pick one end enough for the trailer to back under.
my 1983 JD 410b claims to have a 6k front bucket load and really struggles with around 5k lb. the rear bucket has hooks and easily picks up 3600lb concrete blocks, but that's the largest I've tried. The arm cannot move with that weight on it. and if I don't have my stabilizers down, or weight in the bucket, it's doing an instant wheelie.
The backhoe boom no. The front loader is doubtful.