The right track is not working on my MD70. Drive motor is working properly, hooked up the hoses from the left side to the right drive motor and it worked like a charm. Don't know if the pump is bad or what but the right side is not getting any fluid or pulling at all. My mechanic and I are basically at the end of what we know to try. Can the pump be rebuilt, or does anyone have any idea where I might find a used one. Looking at parts online, the pump looks crazy expensive. Or, can I take part of the pump out and not the whole thing? This is a farm use machine, and I love it when it's running. Appreciate any help/answers you can give, at the end of my rope.