Upper amp; lower ascent and descent link (20,20

摘要

PROBLEM TO BE SOLVED: To permit an operator to easily get on and off a driving seat, as left and right booms are received on the outside of a machine body in a four wheel agricultural working vehicle equipped with a middle boom and left and right booms constituting.;SOLUTION: The four wheel type agricultural working vehicle is liftably equipped with the middle boom 16, the left and right booms 17, 17 constituting the sprayer via lifting links 20, 20 so that they are made switchable between the working mode in which the left and right booms 17 and 17 are extended in a straight line and the rest mode in which the booms are folded and received on both sides of the machine body. A boom-lifting switch 29 for lifting the left and right booms 17, 17 is provided near the platform, separately from the main boom-lifting switch, and the arbitrary boom-lifting switch 29 is made operatable, when the initiation switch 30 for the work vehicle is set off, while it is made unoperatable, when the initiation switch 30 is set ON.;COPYRIGHT: (C)2003,JPO