PROBLEM TO BE SOLVED: To enable a machine body outside of a radiator to be opened while making excessive stress less likely to be applied to supply hoses and discharge hoses of cooling apparatuses, and shorten the lengths of the supply hoses and the discharge hoses.SOLUTION: A dust-proof case 41 can change its state between a closed state to cover a machine body outside of an engine room and an open state to open the machine body outside of the engine room. A support member 54 for supporting cooling apparatuses 51 and 52 is connected to a member 38 on an engine room side through a hinge member 55, and the cooling apparatuses 51 and 52 can swing over a normal posture in which they face a radiator 36, and an open posture in which they are away from the radiator 36 together with the support member 54. Supply hoses 56a and 57a, and discharge hoses 56a and 57a connected to the cooling apparatuses 51 and 52 are composed of a flexible member, and are extended from the cooling apparatuses 51 and 52 to the hinge member 55.SELECTED DRAWING: Figure 8
