What could possibly cause a bobcat to suddenly start jerking, the only way to stop it is to stop moving the loader forward and start to move it slowly. I noticed it doing this a few times before the motor went south. The jerking was pretty violent.???? I have the motor out now and wasn't sure if I should get the pump cleaned, rebuilt, or replaced. (Providing that could even be the problem) Thanks again everyone for the input. This bobcat is new to me and I like to know as much as I can about equipment that I use.