| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent pulsation of hydraulic equipment generated when a work device conducts work from being transmitted to an operator cab and furthermore to reduce damage caused to hydraulic piping connected to the hydraulic equipment due to low frequency vibration generated when a work vehicle is transported, and to prevent significant increase in weight and significant deterioration in fuel economy of the work vehicle.SOLUTION: The work vehicle includes a slewing upper structure 4. The slewing upper structure 4 includes: a slewing frame 5; a hydraulic valve 20 provided on the slewing frame 5 so as to be movable in the vertical direction and connected to hydraulic motors 36a, 38a via a hydraulic hose 30; and a holding mechanism 24 which is switched between a first state in which relative displacement of the hydraulic valve 20 with respect to the slewing frame 5 is restricted while the hydraulic valve 20 is brought into contact with the upper surface of the slewing frame 5 and a second state in which the hydraulic valve 20 is held at a separation position separated upward from the slewing frame 5 while the relative displacement of the hydraulic valve 20 with respect to the slewing frame 5 is permitted.</p> |
