WORK VEHICLE TRAVELING DRIVE UNIT

摘要

PROBLEM TO BE SOLVED: To provide a work vehicle traveling drive unit capable of driving both traveling devices by a relative simple transmission structure in spite of a method of giving speed difference to the right traveling device and the left traveling device for steering a car body. SOLUTION: A left traveling device is driven by a left hydraulic motor 21 and a selector valve 40a, and a right traveling device is driven by a right hydraulic motor 22. The left motor 21 is composed to be operated for a change-over between the forward side and the backward side by the left selector valve 40a, and the left selector valve 40a is composed of a variable restriction valve capable of forward/backward speed adjustment of the left motor 21. The right motor 22 is composed to be operated for a change-over between the forward side and the backward side by a right selector valve 40b, and the right selector valve 40b is composed of a variable restriction valve capable of forward/ backward speed adjustment of the right motor 22.