| 摘要 |
PROBLEM TO BE SOLVED: To enable a stable small turn of a crawler type work vehicle equipped with a rotation operation type steering wheel by driving right and left crawlers in opposite directions at the same time, regardless of the load weight, when switching the rotation direction of a crawler type travel device on the inner side of the turn to a reverse direction with a turn controller. SOLUTION: In a crawler type work vehicle, after the turn steering angle of a steering wheel reaches a starting point Ps of a spin turn region, current of a brake solenoid on the inner side of the turn is decreased and current of a brake solenoid on the outer side of the turn is increased, thereby surely driving each of right and left crawlers in opposite directions without allowing driving torque to move to the side with lighter load. This enables the crawler type work vehicle to make a small turn.
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