I bought a 2014 rancher used and guy told me it was something easy fix . It would start right up but wouldn't move .So a buddy told me to put it on Jacks and see if it would move the tires , so it did but with any kind of pressure it would stop the tires from spinning. 6 months later still cant get it running . Opened her up and oil pump was broke . My question is replacing oil pump fix the whole problem or what could of broke the pump that needs replacing before putting motor back together??? 2014 rancher with 160hrs . Guy that sold it to me did some serious mudding !!! Help please thank you God bless!!!!!