Hi ! The rear wheel on my Bobcat 743 got stuck serveral of times when I was moving snow this weekend. The tempature outside reached -15 degC and the machine worked well for about 2 hours before the right rear wheel got stuch at the first time. I stopped the machine for a couple of minutes but started it up again and tried to run it forward and backward a couple of times. After a number of attemts the wheel could start to rotate for half to a number of revs before it got stucked again. And so on..... Does anyone have a clue why this problem occure ? Thanks in advance !