Traditional Chinese medicine pays attention to looking, smelling, asking, and cutting. For vehicle failures, most of them are judged in the same way. For example, the smoke color of engine exhaust emissions is a good way to judge the health status of the car.

Engine smoke
Engine failure phenomenon: A large amount of white smoke is discharged from the engine exhaust pipe during the driving of the car. One is milky white smoke, and the other is water vapor white smoke, and there are water droplets at the exhaust pipe.
Symptom 1: When a car parked in winter or rainy season starts for the first time, white smoke can often be seen. Once the engine temperature rises, the white smoke will disappear, and this condition does not need to be repaired.
If the exhaust pipe becomes black smoke after the engine temperature rises, it indicates that the cylinder pressure is too low or individual cylinders are not working, and should be checked and eliminated.
Symptom 2: A large amount of water vapor white smoke is discharged from the exhaust pipe when the engine is running.
Check whether there is water in the fuel tank, check whether the cylinder cushion is damaged, whether there are cracks in the cylinder block, whether the cylinder liner sealing ring is good, etc.

Black engine smoke
Engine failure phenomenon: When the car is driving, the engine exhaust pipe emits black smoke, and the exhaust pipe (muffler) has an abnormal sound.
Symptom 1: A large amount of black smoke is emitted from the engine exhaust pipe, accompanied by the sound of cannons, so it can be judged that the mixture is too rich.
Symptom 2: A small amount of black smoke from the engine exhaust pipe, accompanied by a rhythmic "chug" sound, can be concluded to be caused by a small number of cylinders not working or mistiming of ignition.
Cylinder-by-cylinder fire-breaking method can be used to find out the non-working cylinders, or to check and correct the ignition timing.

Engine blue smoke
Engine failure phenomenon: When the car is driving, the engine exhaust pipe exhausts blue smoke or gray smoke, and smells a burnt odor.
Symptom 1: If the engine power performance is good, the oil pressure should be checked first, and if the oil pressure is too high, it should be adjusted. Check the oil dipstick to see if the oil level is too high. If the oil level is too high, excess oil should be released. Check the air cleaner to see if the filter element is blocked. If it is blocked, the filter element should be cleaned or replaced.
Symptom 2: If the engine has been used for a long time or has reached the specified overhaul interval mileage, and the engine power is insufficient, the main reason is that the piston and piston ring are severely worn, and the sealing is poor and the engine oil is running away. Should be sent to the garage for overhaul.

First of all, the purpose of grease selection should be clear. According to the main role of lubricating grease can be roughly divided into three categories: friction reduction, protection, and sealing, and the selection of lubricating grease depends on which one is the main role it plays in the use part.

1. Consider the operating temperature of the lubrication part
The lubrication and service life of the lubricating grease are decided by the temperature of the mechanical friction position and its change. The working temperature of the lubricating position is the important basis for selecting the lubricating grease.

2. Consider the load at the lubrication site

3. Consider the speed of the lubricating part
Since grease belongs to rheological system, its similar viscosity varies with shear rate. Therefore, the physical state and lubricating effect of grease are particularly sensitive to the running speed of lubricating components, which is different from lubricating oil.

4. Consider the environment of the lubricating part and the medium contacted
The environment of lubricating position and the contact medium have a great influence on the performance of lubricating grease, so it should be carefully considered when choosing lubricating grease.

5. Consider how grease is filled
The filling methods of grease include manual filling and pump centralized filling. Smearing, filling, grease gun filling, grease cup filling, etc. are all artificial filling.

6. Considering the overall benefits
When selecting lubricating grease, we should not only care about its price, but also whether it can prolong the lubrication cycle and reduce the maintenance cost. Only the lubricating grease with outstanding comprehensive benefits is the applicable lubricating grease. Hanxing grease is widely used in the industry. The comprehensive lubrication service solution not only solves your equipment lubrication problems, but also allows you to enjoy the best lubrication service.

Synthetic oil has excellent use functions, but generally speaking, the price of synthetic oil is several times or even hundreds of times higher than that of mineral oil, so under what conditions must synthetic oil be used?

(1) Special high or low temperature situations: The use temperature of mineral oil is generally-20 ~ 120 °C. When the equipment starts up and the operating temperature exceeds this range, only synthetic oil can be competent, such as equipment in severe cold areas in the north, low-temperature liquid transportation Equipment, aerospace equipment, steel and petrochemical and other high-temperature operation equipment, generally speaking, choose the appropriate synthetic oil, the low temperature reaches-70 °C, and the use requirements of high temperature above 200 °C are not a problem;

(2) Contact with special media: When mechanical equipment is running, if it comes into contact with some special media, synthetic grease with good compatibility with the media must be used, such as special gas compressor oil, refrigerator oil, special gas, liquid transportation Pipelines, threaded threads of containers, sealing grease for valves, etc.;

(3) Conditions requiring long life or long lubrication cycle: One of the important reasons for equipment lubrication failure is the oxidation deterioration of lubricating oil grease. Using synthetic lubricating oil grease with high oxidation stability can greatly prolong the service life of the oil, and even achieve full-life lubrication.

(4) Synthetic grease is not omnipotent: there are many types of base oils for synthetic lubricating grease, and different types of base oils also have great differences in specific physical and chemical properties due to their different chemical structures. This difference not only endows it with specific excellent properties, but also inevitably has its specific shortcomings. For example, ester oils and polyether oils have corrosive effects on various organic materials. The poor lubricity of silicone oil itself is doomed to be unsuitable for high load conditions. Fluorine-containing oils are too expensive due to their expensive raw materials and complex processes. Of course, for some special equipment and equipment with strict lubrication requirements, it is not none other than synthetic oils to meet their use requirements. In short, before using synthetic grease, the user should fully discuss with the oil supplier on the working conditions and performance requirements, so as to correctly select suitable synthetic grease products.

It should be said that mineral oil lubricating grease will always occupy a dominant position in the field of lubrication due to its abundant raw material sources and low price. However, with the progress of technology, especially in the lubrication of some industries and equipment with harsh conditions, synthetic oil is being accepted by people at an irresistible speed.

Oil viscosity is the most important performance index to measure the fluidity of oil in various states. That is what everyone usually says "is it slippery enough". The lower the viscosity of the engine oil (the more "thinner" feel), the thinner the oil film of the engine oil and the better the fluidity; However, the ability to resist shear is weaker under high temperature and high pressure. Conversely, the higher the viscosity of the engine oil (the more "thicker" feel), it means that the oil film of the engine oil is thicker, and the fluidity is weakened accordingly, but the shear resistance under high temperature and high pressure is better, and it can help the friction pair resist wear under greater pressure.

Storage of vehicle gear oil: It should be stored in a cool and dry place at room temperature. It is not suitable for long-term storage at higher temperatures (such as higher than 40 °C). Because high temperature will accelerate the decomposition of extreme pressure agents or promote the reaction between additives. In addition, water should be prevented from entering the oil to avoid hydrolysis of the extreme pressure agent to form water-soluble acidic substances.

Storage of industrial gear oil: It should be stored in a cool and dry place at room temperature. Avoid high temperature, avoid being close to fire sources, and avoid mixing water, dust and mechanical impurities.

In order to ensure the safe and stable operation of hydraulic equipment, the following points should be paid attention to in the use of hydraulic oil:

Prevent hydraulic oil from being contaminated. The biggest hazard of pollutants is to cause corrosion to equipment, plug filters and orifices, accelerate the aging of oil products and corrosion to components.

Prevent air from mixing in. Mixed air will produce cavitation, noise, and premature deterioration of hydraulic oil, affecting the use.

Prevent moisture from mixing in. The mixing of cooling water and vapor will cause the metal components in the hydraulic system to be corroded, accelerate the deterioration of oil products, and reduce the lubricity of hydraulic oil.

Control the operating temperature of hydraulic fluid. Hydraulic oil should not be used over temperature. The increase in oil temperature will accelerate the oxidation and deterioration of hydraulic oil. At the same time, the acidic substances generated by oxidation will corrode metal components.

Finally, users are reminded that when choosing hydraulic oil, they should pay attention to the compatibility between the types of hydraulic parts and the materials used and hydraulic oil, so as to ensure the good lubrication and operation of each motion pair. Hanxing hydraulic oil series products can meet the needs of users in different industries, and customers can choose according to equipment requirements.