| 摘要 |
A tractor having right and left traveling crawlers ( 9 ) installed thereon, comprising a hydraulic transmission swing mechanism ( 45 ), a forced-diff ( 41 ) for driving a crawler driving sprocket ( 4 ), and an engine ( 10 ), a hydraulic transmission straight-ahead driving mechanism ( 25 ), and a transmission case ( 12 ) disposed from the front side to the rear side of a machine body in that order, wherein an allowance for heat radiation is provided to a space under a machine floor for storing the hydraulic transmission straight-ahead driving mechanism ( 25 ) to eliminate the problem of the machine floor becoming too high, and the forced-diff ( 41 ) is driven by the hydraulic transmission swing mechanism ( 45 ) with a simple structure.
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