| abstract |
An inter cooler 3 for precooling combustion air to the engine 1, an oil cooler 4 for cooling the hydraulic oil of the hydraulic excavator, a radiator 5 for cooling the cooling water of the engine 1, and a centrifugal fan In the engine cooling apparatus which has the phosphorus cooling fan 17 and the suction pipe 19 which guides cooling air to the suction side of the cooling fan 17, the diameter D1 of the suction pipe downstream end 19A is a rotating shroud suction side. It is smaller than the aperture D2 of the end portion 18A, and the suction pipe downstream end portion 19A is disposed to dig into the inside of the rotary shroud suction side end portion 18A. This further reduces noise and at the same time makes the engine compartment 2 compact. |