I have an RC-50 with 170 hours that I bought new. This past weekend while using a grapple to dig up/clear roots one or both of the cylinders that tilt the front plate (name?) started to squeal a little at one point in the range of motion and also I noticed that without an attachment on the front, the cylinders would shutter (jerky motion) when operated real slowly. Any ideas of what may cause this? Is this a sign of dirty hyd. fluid? Would a slightly bent or scored cylinder rod produce this? Would appreciate any clues/advice from the experts. I don't see any signs of a leaky cylinder (yet). The hyd. fluid level is within spec also. I'm going to call the service manager and see what he has to say about it but I'd like to have a "second opinion" from the expert knowledge base here.