| 摘要 |
PURPOSE:To effectively utilize the exhaust supplied from a cooling fan for discharging dusts on a cutter deck by forming an air introducing duct for introducing the exhaust towards the cutter deck side from under the cooling fan. CONSTITUTION:An upper air introducing duct 31 which extends upwardly and penetrates through the upper part of a bonnet 2 and is opened towards the front part along the traveling direction 13 is connected with the upper part of the casing 18 of a cooling fan 15. Further, a lower air introducing duct 32 extending downwardly is connected with the lower part of the casing 18. The lower edge part of the air introducing duct 32 is aslantly bent by an angle gammaso as to be set at a rear position along the traveling direction 13 towards the lower part in order to introduce exhaust towards a cutter deck 36 at the lower position behind an engine body 7.
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