| 摘要 |
PROBLEM TO BE SOLVED: To form a speed changing structure formed of a speed changing pump 67 and a motor 68 compact, reduce manufacturing cost, form an engine 21 compact, and simplify a traveling transmission structure. SOLUTION: In a crawler type traveling vehicle in which the speed changing pump 67 and the motor 68 of a hydraulic continuously variable speed changing structure with a steering pump 69 and a motor 70 are installed on a transmission case 23, an output lock mechanism 138 to directly transmit output of the engine 21 to the output side of the speed changing motor 68 is provided, so the output lock mechanism 138 is actuated by manual operation and/or automatic control.
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