I have a Mahindra 4500 tracor with a ML260 Loader. My loader control valve leaks hydraulic fluid from one of the (pistons) usually when i press forward on the control stick. Leaks all over my right foot. The control valve is a Nimco. Can I replace this valve a diferant brand or get a seal kit for this one? What should I look for in a replacement loader control valve? Thanks in advance for advise!!