Hydraulic traveling vehicle

A hydraulic traveling vehicle comprising:

• a right-travel motor arranged in a first hydraulic circuit to be driven by pressurized oil that flows in the first hydraulic circuit;
• a left-travel motor arranged in a second hydraulic circuit to be driven by pressurized oil that flows in the second hydraulic circuit;
• a first pilot circuit through which pilot pressurized oil flows to regulate the pressurized oil supplied to the right-travel motor, the first pilot circuit being hydraulically separate from the first and second hydraulic circuits;
• a second pilot circuit through which pilot pressurized oil flows to regulate the pressurized oil supplied to the left-travel motor, the second pilot circuit being hydraulically separate from the first and second hydraulic circuits;
• a hydraulic pump having a first hydraulic oil supply unit configured and arranged to supply the pressurized oil to the right-travel motor via the first hydraulic circuit and a second hydraulic oil supply unit configured and arranged to supply the pressurized oil to the left-travel motor via the second hydraulic circuit;
• a merging/diverging valve configured and arranged to switch between a merging state to merge the first hydraulic circuit and the second hydraulic circuit and a diverging state to separate the first hydraulic circuit and the second hydraulic circuit;
• and
• a travel switching unit configured to switch the merging/diverging valve between the merging state and the diverging state depending on whether the hydraulic traveling vehicle is in a sharp turning state or a gentle turning state so that the merging/diverging valve is placed in the merging state when the hydraulic traveling vehicle is in the sharp turning state, with the sharp turning state being as a result of one of the right-travel motor and the left-travel motor being stopped and the other being driven, and the gentle turning state being a result of the right-travel motor and the left-travel motor being driven at different rotational speeds.