| 摘要 |
PROBLEM TO BE SOLVED: To prevent efficiency reduction and seizure on the HST 24 side when using lubricating oil used for an engine and a hydraulic fluid of an HST 24 in common for a power unit U having integrally an engine 13 and the HST 24. SOLUTION: By constituting so as to input common oil to the HST 24 from the engine 13 side after cooling, reduction in viscosity of the common oil can be restrained, and overheat of a device can be prevented.
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