I started my 1025r and was going to move it, but I cant get the controls to work the bucket doesn't move at all. I changed the filter and the bucket moved for a bit, but back to square zero. now the tractor moves very slowly when wanting to go forward. . I checked the hydraulic fluid level and it reads good. when I changed the filter the hydraulic fluid looked very cloudily. the meter reads 304. hours. do I need to change the fluids?