Patent ID: 8096200

Claim:
A tractor, comprising: a transmission portion; a PTO portion being configured to include a PTO case which is detachably mounted on an opening portion formed on a rear end portion of the transmission portion and a PTO clutch mechanism arranged in the inside of the PTO portion; a PTO transmission mechanism being disposed in an inside of the PTO case; and said PTO clutch mechanism being detachably mountable to the PTO case for disposition in the inside thereof such that the PTO portion is changeable between a first mode in which the PTO clutch mechanism is disposed in the inside of the PTO case and a second mode in which the PTO clutch mechanism is not disposed in the inside of the PTO case, the PTO case having a three-split constitution comprised of a front case forming body, an intermediate case forming body and a rear casing forming body; an input shaft rotatably supported on the front case forming body, and an output gear is mounted on a rear end portion of the input shaft; a transmission shaft rotatably supported on the front case forming body and the rear casing forming body, an input gear and a transmission gear, and the PTO clutch mechanism is provided between the input gear and the transmission gear; and a PTO shaft supported on the intermediate case forming body and the rear casing forming body, and a shift gear body and a shift gear are mounted on the PTO shaft.