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How to judge whether the antiwear hydraulic oil is damaged?

Anti-wear hydraulic oil is the hydraulic medium used in the hydraulic system using liquid pressure energy, which plays the role of energy transfer, anti-wear, system lubrication, corrosion prevention, rust prevention and cooling in the hydraulic system. Antiwear hydraulic oil is like the blood of the human body, which provides energy to hydraulic equipment. The quality of antiwear hydraulic oil not only affects the normal work of construction machinery, but also damages the parts of the hydraulic system. So we must often give our hydraulic equipment to check the quality of anti-wear hydraulic oil.

1
. Identification of hydraulic fluid moisture content

(1)
Visual method: if the oil is milky white turbidity, it means that the oil contains a lot of water.

(2)
Combustion method: Use clean, dry cotton yarn or cotton paper dipped in a little oil to be detected, and then light it with fire. If the "crackling" sound or flash phenomenon is found, it indicates that the oil contains more water.

2.
Identification of impurities in hydraulic fluids

(1)
Sensory identification: there are obvious suspended metal particles in the oil, and the existence of fine particles can be directly felt when twisting with fingers; In the light, if there is a reflective flash point, it indicates that the hydraulic components have been severely worn; If a large number of metal chips are deposited at the bottom of the tank, it indicates that the main oil pump or motor has been seriously worn.

(2)
Heating identification: For low viscosity hydraulic oil can be directly put into the clean, dry test tube heating. If the oil in the test tube is found to be precipitated or suspended, it indicates that the oil has contained mechanical impurities.

(3)
Filter paper identification: For higher viscosity of anti-wear hydraulic oil, can be diluted with pure gasoline, and then filter with clean paper. If large amounts of mechanical impurities (metal powder) are found on the filter paper, the hydraulic components are severely worn.

(4)
Sound identification: if the whole hydraulic system has a large, intermittent noise and vibration, at the same time the main oil pump issued a "buzz" sound, even the piston rod "crawling" phenomenon, then observe the tank level, tubing outlet or transparent level gauge, will find a large number of bubbles. This indicates that the antiwear hydraulic oil has been immersed in a large amount of air.

3.
Identification of hydraulic fluid properties

Identification of tank oil: Remove a little of the measured oil from the tank and filter it with filter paper. If there is black residue on the filter paper and there is a pungent odor, it indicates that the oil has been oxidized and deteriorated. It can also be directly removed from the bottom of the tank to partially precipitate the sludge. It indicates that the oil has been oxidized and deteriorated.

The condition of anti-wear hydraulic oil directly affects the health of your hydraulic equipment. Once the problem of anti-wear hydraulic oil occurs, the service life of hydraulic equipment will be greatly shortened. So when your hydraulic oil has the above problems, remember to replace it immediately.