All of our new parts are aftermarket replacements. Compatible with Ford Tractor(s) 8530 (Diesel), 8630 (Diesel), 8730 (Diesel), 8830 (Diesel). The operator’s manual (sometimes referred to as the owner’s manual) is the manual that came with the equipment. It can be compared to the manual you receive in the glove box of a new car. This manual gives the owner-operator instructions, shift patterns, capacities anti-freeze, crankcase, etc. And adjustment procedures brakes, clutch, etc. This is a very useful and valuable tool in operating your equipment. All States Ag Parts Item No.