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How to identify whether the hydraulic oil needs to be replaced?

1 Hydraulic oil The color is milky white


It is proved that the hydraulic oil is mixed with water, and the emulsified hydraulic oil will deteriorate when it enters the hydraulic system. The rust slag flows in the hydraulic system for a long time, the hydraulic pressure will be affected, and the arm and bucket will become weak, so they must be replaced.


two The hydraulic oil turns black


  • When changing the hydraulic oil, it was not cleaned; there were metal scraps in the hydraulic oil, or the hydraulic system might have been worn, causing the hydraulic oil to blacken.

  • The hydraulic oil has deteriorated due to high temperature.

  • Due to the poor working environment of the excavator, the hydraulic oil return filter element was not replaced on time, resulting in the blockage of the filter element.

  • Oil seal aging, deterioration, resulting in the chemical substances contained into the hydraulic oil, resulting in deterioration.

  • The respiratory filter element was not replaced regularly.


3 Look at the hydraulic oil scale

When the truck is cold, park the excavator on the flat ground, retract all the piston rods of the excavator, and the oil cylinder is in the large cavity state. It is normal to see that the hydraulic oil scale is between the two scales. If it is insufficient, it needs to be added.


4 summary


The hydraulic oil is equivalent to the blood of the excavator, so it must be replaced in time to avoid greater problems. Do not have a fluke mind, miss the replacement time.


 Long life synthetic hydraulic oil_ Copy.jpg

Hydraulic oil for ore blending

This product is refined from high-quality imported base oil and imported composite additives. It has good cleanliness, excellent fluidity, high-pressure anti-wear performance, high-temperature oxidation resistance and anti foaming performance. It keeps the hydraulic system clean, responsive and smooth.

Executive standard: GB 1118.1-2011

Through the test data of the whole machine, the normal working construction machinery can meet the requirements of 3000 hours oil change under the condition of knowing the oil change standard and matching qualified filter.