| 摘要 |
PROBLEM TO BE SOLVED: To improve cooling performance of a cooler, a cooling fan, and an engine, and reduce noise by effectively cooling both the engine system and hydraulic system. SOLUTION: An operator room is provided at one side part 1a at a front end part of a construction machine, an engine 8 connected to a hydraulic pump 26 is provided between a counter weight provided at a back part of the construction machine and the operator room, and a first cooling fan 52 to cool a radiator 40 disposed in front of the engine 8 and a drive means 52a for that are provided. In addition, an oil cooler 50, a second cooling fan 53 to cool the oil cooler 50, and a drive means 51 for that are provided at either side part of one side part 1a where the hydraulic pump 26 exists and the other side part 1b, a working fluid tank 30 is provided between the hydraulic pump 26 and the second cooling fan 53 or the drive means 51 for that, and an engine room ER comprising a partition wall to surround at least the engine 8 among the radiator 40, the first cooling fan 52, and the engine 8 is provided.
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