Is it an indication that the hydraulic fluid and filter(s) need changing when the tractor seems to lose strength in the backhoe/FEL plus its hill climbing ability is weakening as well? The tractor was bought new in october '07 and has about 76 hrs. and no hydraulic attention at all. My theory is that since it was new, that break-in crud is blocking the flow thru the filter causing the loss in hydraulic power. Is that thinking correct?