Revealing Why Hydraulic Oil in Small Rotary Drilling Rigs Turns Black

Small rotary drilling rigs are commonly used, so there will also be more problems encountered. So, today let's take a look with the editor at the main reasons for the blackening of hydraulic oil in rotary excavators: firstly, the working environment is not good, and external pollutants enter the hydraulic oil; Secondly, it contains metal impurities.

First, take a look at the impact of the external environment: check whether the hydraulic system of the rotary drilling rig is closed and whether the breathing hole is intact; Check the exposed components of the hydraulic part of the equipment to see if the seal is intact, such as the dust ring of the oil cylinder.

1. The oil seal has aged.

2. I didn't clean the hydraulic oil thoroughly when changing it.

3. There are a large number of bubbles in the air entering the hydraulic pump.

4. The working environment of the rotary excavator is too poor, causing filter blockage.

5. The hydraulic oil tank is connected to the air, and dust and impurities in the air can enter the tank over time, causing the hydraulic oil to turn black.

6. The particle size test of the oil meets the cleanliness requirements and can identify dust pollution. It can be said that it is caused by high temperature of hydraulic oil. You can replace the hydraulic oil with a good one, check the return oil filter element, heat dissipation oil circuit, mainly the hydraulic oil radiator. Regular maintenance and upkeep should be carried out according to regulations.