The quality of the oil directly affects the service life of the excavator. The cause of many failures in excavators is often due to the use of inferior oil. Although non-pure oils sometimes do not cause damage to equipment in a short period of time, they pose a significant potential hazard and the failure is too late.
Some of them are for cheap prices, they know they are buying non-pure oil. Some people spend their money on real oil, but they are tricked into buying fake oil. There are many kinds of oils for construction machinery. How to distinguish various oils? Here's a simple way for everyone to share.
1. Oil identification
First of all, how to identify the quality of oil, share four methods for everyone:
(1) Inferior motor oil has special oil color and oil taste, such as dark brown to blue-yellow, and has an acidic pungent smell. The real oil color is brighter.
(2) Observe the bubbles. After the oscillation, the bubble size gradually disappears, and the oil is yellow after being "suspended".
(3) The feeling of inferior engine oil is special. After the water is shaken, there is slight emulsification and stickiness, and the short steel wire can be pulled out. Counterfeit oils usually have turbidity.
(4) Appearance packaging observation, if the appearance of the oil is found to be illegible, the material is rough, it is likely to be fake oil. You must also pay attention to whether there is a security label.
2. Hydraulic oil mark
(1) Identification of hydraulic oil content of engineering machinery hydraulic oil. By visual inspection, if the oil was found to be milky white and turbid, it was proved that the hydraulic oil contained more water.
(2) Using the combustion method. Light it with a clean cotton gauze and a little oil. If the sound is "beep" or flashing, the oil contains a lot of water.
(3) In the high temperature test method, the measured oil is placed in a dry test tube, and then the test tube is heated to above 100 ° C. If the test tube emits a sound, the oil may be foamed or turbid, or bubbles may condense on the tube wall. Indicates that the oil contains more water.
3. Transmission oil identification
(1) Color identification, the real oil is generally red.
(2) When the real oil "hangs the bottle", it is not clean for a long time.
(3) When the real oil is shaken, bubbles rarely appear.
(4) Crude oil is not easy to remove and can be extracted.
3. Gear oil identification
(1) Careful observation of color, the real gear oil is generally black to black green.
(2) When the smell of oil is smelled, the real gear oil will have a burning smell.
(3) Observe the fluidity of the oil. After the real gear oil is "suspended", it is not clean for a long time.
(4) Observe the oil bubbles. After the real oil is shaken, bubbles rarely appear.
(5) Observe the viscosity of the oil. The real gear oil is not easy to remove after touching the hand and can be extracted.
4. Identification of diesel
The original diesel oil is yellow, the flash point is above 60 °C, the inferior diesel has a large residual carbon content, the color is black, and the flash point is only 43 °C. At present, the agricultural fuel supplied in China is No. 0 diesel and No. 1 is No. 20 diesel. The identification methods of the two diesel engines are as follows:
(1) Cooling test method: A small amount of diesel glass tube was placed in ice water. If it solidifies immediately, it is not O-type diesel. If it does not cure, it is O-type diesel. If there is no ice water, you can use cold water instead.
(2) Combustion discrimination method: Two kinds of diesel oil are used for combustion comparison. No. 20 diesel is black smoke, and No. 0 diesel is black smoke.
(3) Oil quality observation method: No. 0 diesel oil contains less wax, low density and yellow color. No. 20 diesel contains more wax, higher density and deeper color.
(4) Density test method: No. 0 diesel is lighter than No. 20 diesel. The two diesels are mixed in a transparent container. It can be seen that the No. -20 diesel sinks and the No. 0 diesel floats.
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