| 摘要 |
PROBLEM TO BE SOLVED: To prevent a danger to an operator by excessive speed difference between right and left running crawlers during steering and turning in a running mission case including a hydraulically driven differential device in a work vehicle. SOLUTION: This work vehicle has the running mission case 4 including the differential device 3 for steering and turning the car by driving a hydraulic continuously variable transmission device 2 by operation of a power steering lever 1, and a monitor display 6 for exchanging and displaying an operation state of each device as a basic setting screen A. When a speed difference between right and left running crawlers 5 running on a soil surface exceeds a set value, output rotation speed of the continuously variable transmission device 2 is regulated not to increase, the basic setting screen A of the monitor display 6 is exchanged to a speed display screen B of the crawler 5, and the basic setting screen A of the monitor display 6 is exchanged to the speed display screen B of the crawler 5 also when the turning operation is performed by the operation of the laver 1.
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