I installed a new fan belt on my TO-35 last summer, after the old belt had " only" 40 years of use. My tractor has a front end loader, and the hydraulic pump for the FEL runs from a shaft coupled to the crankshaft at the front of the engine. I'd been dreading installing the new belt, but it wasn't a very hard job after all. I unbolted the drive flange at the hydraulic pump, and unbolted the pump from the FEL frame to create a space to slip in the new belt. No hydraulic hoses needed to be removed.