| 摘要 |
PROBLEM TO BE SOLVED: To reduce heat transfer to an operator from heat generating devices while securing a space of the operator by highly efficiently disposing the devices on a turning table. SOLUTION: An engine 31 is laterally disposed on the rear part of the turning table 7, a suction type radiator 36 and a hydraulic pump 33 are disposed in the right side and the left side of the engine 31 respectively, hydraulic oil tank 34 and a control valve 35 are disposed in the front side of the radiator 36, and which are covered with a bonnet 10. The hydraulic oil tank 34 is disposed in the front side of the engine 31 and the hydraulic pump 33, and an operation part 11 is disposed in the side of the control valve 35, a partition wall 16 is provided between the operation part 11 and the engine 31, and an oil pressure pipe connecting the hydraulic pump 33 to the control valve 32 is disposed between the partition wall 16 and the engine 31. A ventilation passage incorporating the outside air from the side of the hydraulic oil tank 34 and the control valve 32, leading it to be sucked in the radiator 35 and emitting it to the side of the engine 31 and the hydraulic pump 33 is formed.
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