Question on my skid...I have noticed the more I work the machine the lift arms seem sluggish, sometimes almost stop after about 4 to 5 feet of vertical lift. The tilt seems fine. When I start the machine cold everything is fine....this happens only after working it lifting some pretty heavy wet clay. I also noticed the drive seems to become alot noisier after a while also. I am running the machine at full throttle and all fluids are topped off and hydraulic main filter has about 20 hours on it. Any ideas ???? Thanks, Tim