Hydraulic drive working vehicle

摘要

A hydraulic drive vehicle includes a bypass valve (30) for fluidly connecting or disconnecting a pump/second-motor line and a second-motor/first-motor line, and set a capacity of a first hydraulic motor (14) to a standard capacity which makes a peripheral speed of a first wheel (9) driven by the first hydraulic motor (14) equal to a peripheral speed of a second wheel (8) driven by a second hydraulic motor (13) when the bypass valve (30) fluidly disconnects the two lines and set the capacity of the first hydraulic motor (14) to a first capacity smaller than the standard capacity when the bypass valve (30) fluidly connects the two lines. The present invention makes it possible to widen a variable range in which a traveling speed of the vehicle could be changed.