ENGINE COOLING DEVICE OF CONSTRUCTION MACHINERY

In an engine cooling system for a construction machine comprising a shroud rear portion (10b) supported on the engine (8) side and surrounding a cooling fan (11), a shroud front portion (10a) supported on the heat exchanger (9) side for introducing cooling air (P) to the shroud rear portion (10b), and a sealing member (43) for sealing off a gap between the shroud rear portion (10b) and the shroud front portion (10a) while allowing a relative displacement between the shroud rear portion and the shroud front portion, an inner diameter (Da) of a downstream end (10a1) of the shroud front portion is larger than an outer diameter (Db) of an upstream end (10b1) of the shroud rear portion, and the downstream end (10a1) of the shroud front portion and the upstream end (10b1) of the shroud rear portion are located substantially at the same position in the horizontal direction. This arrangement reduces an installation space required within an engine room (4) and enables the engine cooling system to be applied to small-sized construction machines, while the fan efficiency can be improved.