Well this isn't fishing related but I thought some of you guys/gals might be able to help me out on here. I have an Allis Chalmers 5015 diesel tractor that I can't get the back arms to pick anything up. Will go down but won't pick up any weight. We have drained the hydraulics twice, the 1st time it was milky and we have changed the hyd. filter twice. Also my brother found a couple of small pieces of plastic in the fluid when we drained it. Anyone have any ideas? Thanks in advance.