| 摘要 |
PROBLEM TO BE SOLVED: To provide a tractor that prevents a wrong abnormality determination of a draft sensor.SOLUTION: A tractor includes a traveling machine body 1 where a working machine is connected through a lifting/lowering link mechanism 2, draft sensors 12L, 12R for detecting a towing load of the working machine, and a draft automatic control function for automatically performing lifting/lowering control of the working machine on the basis of sensor values of the draft sensors 12L, 12R. The tractor includes draft sensor abnormality determination means for determining that the draft sensors 12L, 12R are abnormal when the sensor values of the draft sensors 12L, 12R are deviated from a normal range and a state deviated from the normal range exceeds a predetermined abnormality determination time T1. The draft sensor abnormality determination means delays the abnormality determination time T2 when the sensor values of the draft sensors 12L, 12R are deviated from the normal range by a load in the pushing direction.SELECTED DRAWING: Figure 6 |
