| 摘要 |
PROBLEM TO BE SOLVED: To provide a working vehicle equipped with an HMT which is capable of minimizing the size of the HST, and widening the running speed changing range, while easily producing freewheel state of the driving wheels. SOLUTION: The HMT is designed to be held in a substantially output shutdown mode during the HST output is at a maximum level in either a forward or a reverse direction, and switched from the substantially output shutdown mode to a maximum output mode as the HST output is changed from the maximum output level in either the forward or the reverse direction to a maximum output level in a reverse direction. A forward/rearward travel direction switching unit is interposed between the driving source and the HMT with respect to a power transmission direction, which is designed to be switched into a forward travel mode enabling a transmission of drive power from the driving source to the pump shaft with the rotational direction of the drive power maintained in a forward direction, a rearward travel mode enabling a drive power from the driving source to the pump shaft with the rotational direction of the drive power changed to a reverse direction, and a neutral mode shutting off a power transmission path from the driving source to the pump shaft. COPYRIGHT: (C)2007,JPO&INPIT
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