| abstract |
A cooling device for a construction machine capable of ensuring a highly accurate cooling performance. A cooling device for a dump truck according to the present invention is connected to a high temperature radiator through a cooling water pipe and has a capacity set smaller than that of the high temperature radiator that cools cooling water of an engine. The auxiliary radiator 42, a second auxiliary radiator 43 that is connected to a low-temperature radiator 41 that cools the intake gas compressed by the turbo through the cooling water pipe 54, has a capacity set smaller than that of the low-temperature radiator 41, a cooling fan 49, The first auxiliary fan 45 for cooling the first auxiliary radiator 42, the second auxiliary fan 46 for cooling the second auxiliary radiator 43, and the cooling fan 49 or the first auxiliary fan depending on the engine output. 45 and a controller 50 that performs a control process for selectively operating the second auxiliary fan 46.[Selection] Figure 2 |