Just wondering if anyone can help.I plowing snow the other day and on my way home my machine started to pull really hard to the left,i pulled over and took a look at it and found nothing wrong that i could see so i took it out of 4 wheel and it did the same thing so i limped it home and it started to make a noise in the front right wheel.When i got it home i raised it up and found the right wheel was a little tight so i pulled the spindle cap off and found the cotter pin had been sheared of,i a loosend up the casle nut and installed a new pin and all seems ok.My concern is that my wife drives this also and when this pulled to the left real hard it almost sent me for a ride,any info on what could have caused this would be great,i just want it to be safe for my wife and myself .THANK YOU