| 摘要 |
PROBLEM TO BE SOLVED: To arrange a radiator 24 and an engine 21 without restricting each other, to maintain internal temperature of an engine room 63 at an appropriate level without influence of a cooling state of the radiator 24, and to improve ventilation and noise reduction functions of the engine room 63. SOLUTION: A ventilation duct 53 is connected to the engine room 63 that internally comprises the engine 21. The engine room 63 is ventilated by a ventilation fan 62 fixed differently from a cooling fan 28 of the radiator 24 via the ventilation duct 53.
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