A equipment that what was used for control cooling device can be by operation of hydraulic motor drive's ventilation blower

The utility model relates to a control cooling device can be by the equipment of the operation of hydraulic motor (1) driven ventilation blower, cooling device is the cooling device in agricultural operation apparatus especially, wherein, hydraulic motor (1) can be with the aid of hydraulic pump (3) via valve gear (7) supply with pressure fluid, the valve gear adjustable to the first valve position in with so that hydraulic motor (1) along the operation of first rotation direction and in adjusting the second valve position with so that hydraulic motor (1) move along the second rotation direction, and there are controlling means (21), with the help of this controlling means, can be adjusted when change between first and second valve position valve gear (7) and reduced to a period in hydraulic motor's (1) pressure supply's the intermediate position, the reduction of ventilation blower rotational speed can be realized to this section period.