A hose looping supporter (21) is provided on an upper surface (13A) of a lid (13) of a tank body (12) constituting an operating oil tank (11). This hose looping supporter (21) is constituted by a mounting member (22) mounted on the lid (13) and four retaining arms (23) each bent in a substantially J-shape. A suction hose (19) has its midway portion adapted to be looped annularly, and this looped hose portion (19B) is mounted by being held looped by each revolving frame (23). Meanwhile, in the case of replenishing a fuel tank (15) with fuel, the suction hose (19) can be easily removed from each retaining arm (23) of the hose looping supporter (21) by reducing the diameter of the looped hose portion (19B) of the suction hose (19).