from the looks of where it broke, its been weak for a while. the color of the metal was different in places showing dark areas where it looked to be already broke and shiny areas of fresh break.
ive been piling logs in a place below the landing because the landing is full i drug about 15 or so up, and i brought a poplar up and dropped it. i turned around and pushed it up in the pile, i backed up and it spun out(it is slightly sloped where im pileing), it never made a breaking sound or nothin. i just looked down and the axle had slid out about 4" and hyd. fluid was goin everywhere.