| 摘要 |
PROBLEM TO BE SOLVED: To improve traveling performance such as a directional change. SOLUTION: In this combine, right and left traveling crawlers 3, 4 supported on a driving sprocket 39 and an idle roller 42 are mounted on right and left track frames 1, 2 through a track roller 40, and the right and left track frames 1, 2 are provided on a machine through crawler lifting arms 31, 32. The idle roller 42 is movably provided in the ground contact directions of the traveling crawlers 3, 4.
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