Abstract: A firewall (11) is provided as a partition between an engine room (25) in which an engine (7) and an exhaust gas post-treatment device (10) are arranged and a pump room (26) in which a hydraulic pump (8) is arranged. A rear surface plate (13) of the firewall (11) is provided with an outflow opening (28) for causing cooling air sucked into the engine room (25) to flow out toward a counterweight (6). Aright weight part (6C) of the counterweight (6) is provided with an exhaust opening (29) in a position facing the outflow opening (28) for causing cooling air having flowed out from the outflow opening (28) to be discharged to an exterior.

Abstract: A firewall (11) is provided as a partition between an engine room (25) in which an engine (7) and an exhaust gas post-treatment device (10) are arranged and a pump room (26) in which a hydraulic pump (8) is arranged. A rear surface plate (13) of the firewall (11) is provided with an outflow opening (28) for causing cooling air sucked into the engine room (25) to flow out toward a counterweight (6). Aright weight part (6C) of the counterweight (6) is provided with an exhaust opening (29) in a position facing the outflow opening (28) for causing cooling air having flowed out from the outflow opening (28) to be discharged to an exterior.

Abstract: A wheel type traveling body includes: a drive device provided on a frame for forming a chassis of the wheel type traveling body; pairs of left and right front and rear wheels which are provided on a front axle and a rear axle respectively, which are provided at the front and rear of the frame, respectively; a propeller shaft provided between the front and rear axles and transmitting the travel drive force of the drive device to the front and rear axles; and a bearing provided on the frame and rotatably supporting an intermediate part of the propeller shaft. The wheel type traveling body also includes a protection member provided so as to be separated from the bearing in the radial direction of the propeller shaft and so as to cover the outer periphery of the bearing from below.