Is the temperature of the excavator hydraulic oil high, will it cause the water temperature to rise?

The high temperature of the hydraulic oil of the excavator will inevitably cause the water temperature to be high. When the hydraulic oil radiator is clogged, it will cause the hydraulic oil to heat up. Moreover, the amount of air intake will be affected after the blockage, and the water temperature will further increase.


The hydraulic oil radiator of the excavator shares a heat dissipation system with the coolant radiator (water tank), which is cooled by the fan at the front end of the engine. The hydraulic oil radiator is placed in a frame before the coolant radiator, and the gap between the two is very small, and the arrangement structure of the car coolant radiator and the air conditioner radiator is similar.

Excavator Hydraulic Oil Radiator

Excavator Hydraulic Oil Radiator


Oil Cooler for Hydraulic Excavator

Oil Cooler for Hydraulic Excavator


The excavator cooling fan draws in cold air from the outside and discharges it from the engine hydraulic pump through the radiator. The heat of the radiator is taken away by the cold air to achieve the purpose of cooling and cooling. Because the hydraulic radiator is in front of the water tank, when the hydraulic oil is at a high temperature, the temperature of the cold air will rise when passing through the hydraulic radiator, which will reduce the heat dissipation effect of the cooling water radiator, and the cooling capacity of the cooling water radiator will decrease even if the water temperature will rise slightly. high. If the hydraulic radiator is dirty or blocked, the ventilation will be poor, the wind speed will decrease, and the wind speed will reduce the air volume, which will result in poor operation of the heat dissipation system, and the capacity of the system will naturally increase.


Generally, the temperature of the hydraulic oil of the excavator is lower than the water temperature by more than 10 °C. The system must pay attention to the high temperature. The high temperature damages the digging machine, the working efficiency is slow, the speed is slow, the rubber products of the sealing ring are prematurely aged, and the hydraulic oil is also prone to deterioration. The overall damage to the excavator is relatively large. When high temperature occurs, first check whether the radiator is clean, if necessary, clean it up, then check if the fan belt is too loose, the speed is sufficient, and finally check whether the engine power is sufficient and whether the hydraulic system is overloaded.