| 摘要 |
PROBLEM TO BE SOLVED: To easily make an accurate failure diagnosis of detecting switches in a working vehicle including a plurality of detecting switches for detecting shift changeover to the respective gear stages of a travel shift mechanism having a plurality of travel gear stages, and giving notice when abnormality occurs to the detecting switches. SOLUTION: The working vehicle is provided with: the detecting switch 97 for detecting low speed changeover of the travel shift mechanism having three travel gear stages of low speed, medium speed and high speed and capable of changing over to neutral; the detecting switch 98 for detecting medium speed changeover, the detecting switch 99 for detecting high speed changeover; and the detecting switch 96 for detecting neutral changeover, respectively. The respective detecting switches are arranged so that their detecting operation ranges overlap in part. Consequently, when each detecting switch is normally operated, at least one of the four detecting switches 96, 97, 98, 99 is placed in detecting operation, and when all the four detecting switches are placed in the non-detecting state, notice of abnormality is given. COPYRIGHT: (C)2010,JPO&INPIT |
