Brake fluid, commonly known as "brake oil," is the medium that transmits pressure in the hydraulic brake system of a motor vehicle. In order to ensure the safety of driving, the appropriate brake fluid should be selected according to the requirements of the instruction manual.
Q: How to use locomotive brake fluid?
A: The brake fluid should have the following properties: 1 good chemical stability; 2 no corrosion of metal parts, and the absorption of water can be completely dissolved, does not cause delamination and precipitation; 3 have a suitable viscosity and low temperature fluidity; 4 transmission fluid pressure performance.
China's vehicle brake fluid has the following three types: 1 alcohol type, made of refined castor oil plus ethanol or n-butanol; 2 synthetic type, made of additives such as ether, alcohol, and ester; 3 mineral oil type , With a low freezing point, distillate oil with an initial boiling point greater than 210 °C plus tackifiers, antioxidants, rust inhibitors and dyes blended. According to the characteristics of agricultural locomotive use, the following two options can be used: 1 Alcohol-based brake fluid No. 1 and No. 3. Among them, No. 1 is suitable for vehicles in general areas; No. 3 is suitable for high-speed, heavy-duty vehicles in high temperature areas. 2 Mineral oil-based brake fluid No. 9 and No. 7, of which No. 9 is used in areas above -25°C and No. 7 is used in cold areas.
Q: What should I pay attention to when using brake fluid?
A: 1 Alcohol type brake fluid should not be used in severe cold areas and hot mountain areas. 2 Locomotive brake fluid must be inspected before it is added. If it is found that the white precipitate contains impurities, it should be filtered before use. 3 Different types of brake fluid cannot be mixed and mixed. 4 When replacing the brake fluid, the brake system should be cleaned and dried. 5 When the mineral oil type brake fluid is used, the brake system's cups and hoses must be replaced with oil-resistant rubber products to prevent corrosion and affect safety. 6 Synthetic brake fluid is easy to absorb water. Some brands have a dissolving effect on the paint. They must be tightly sealed and prevented from dripping on the body shell. 7 pay attention to fire, brake fluid should not be stored in the open to prevent its deterioration, failure. 8 The brake fluid is generally replaced at the same time when the piston of the cup is replaced. The general oil change period is 1 to 2 years.
Q: How to identify true and false brake fluid?
A: There are many counterfeit brake fluids on the market today. If the driver buys this kind of brake fluid, it will bury potential accidents. Now introduce a simple method to identify true and false brake fluid: pour a little brake fluid on the palm of your hand, the real brake fluid will generally feel a little cool, and after a moment it will feel a little hot and volatile; if you feel the system If the fluid is abnormally cold, there is no thermal sensation, and it will slowly evaporate, it is likely to be a fake brake fluid and cannot be purchased and used.
Q: What should I do if I find that there is less brake fluid on my way?
Answer: When the vehicle is driving, if the brake fails due to lack of oil in the brake system, the driver should do the following: 1 Do not rush to add different types of brake fluid. Because different types or different types of brake fluids are not allowed to be mixed, there will be stratification, loss of braking performance, and endangering driving safety. 2 Identify the cause of oil shortage as soon as possible and proceed according to different circumstances. If the sealing element is damaged, it should be replaced with a new one; if the joint is loose, it should be tightened immediately; if the brake fluid is naturally lost, the same type of brake fluid should be added. 3 If you do not bring or can not buy the brake fluid of the same type as the original, you should completely release the brake fluid remaining in the brake system, then thoroughly wash the brake system with alcohol and then add a new brake fluid. 4 If you can not buy brake fluid, you can use alcohol or liquor instead. However, at this time, the braking effect of the locomotive brake will be reduced. Therefore, the locomotive must use a low speed gear and pay attention to the control of the vehicle speed. It is not possible to perform emergency braking to ensure driving safety. And it is necessary to close the car as soon as possible, release the substitute immediately after the car is replaced, and use the brake fluid that is suitable for this model.
Q: How to prevent the brake fluid from being polluted by water?
A: The brake fluid is hygroscopic and sensitive to water. If moisture invades the brake fluid, the brake fluid will be stratified, deteriorated, and deteriorated in low temperature performance. Therefore, the brake fluid must be prevented from being contaminated by water during use. 1 If the agricultural locomotive runs for a long time in the rainy season, waterway and humid environment, the brake fluid replacement period should be shortened. 2 When replacing different types of brake fluid, the brake system piping must be cleaned. 3 If a white precipitate is found in the brake fluid before filling the brake fluid, it should be filtered before use.
Q: How to eliminate the air in the hydraulic brake system?
Answer: Excluding the air in the hydraulic braking system, two people are generally required to cooperate. One person steps on the brake pedal in the cab, and one person enters the underside of the locomotive to do air exclusion work. 1 Open the lid of the brake fluid reservoir, clean the dust around the lid, and add enough brake fluid. 2 Remove the dust cover on the bleed screw plug of one of the brake cylinders and prepare the wrench. 3 People in the cab step on the brake pedal. Note that when the pedal is depressed, it should be fast. When it is relaxed, it should be slow. After a few consecutive steps, the brake pedal should be pressed and kept still. At this time, the underbody of the vehicle loosens the pump bleed plug (approximately 1/4 to 1/2 of all threads) with a wrench. At this time, the brake fluid is pushed out by the master pump piston. Department of air. As the air in the brake system is exhausted, the pedals will loosen, but at this time, the pedals should still be stepped on to prevent the air from entering the brake system from the deflation. After the bleeder plug is tightened, release the pedal. The above operation is repeated until the air in the brake system is exhausted. 4 Use the above exhaust method to remove the air from the other wheel brake cylinders.
After the air is removed, the brake fluid level in the tank decreases. If the brake fluid level is less than 1â„2 of the tank capacity or less than the lower engraved line, the brake fluid should be refilled to the specified fluid level.
Q: How to keep brake fluid?
Answer: The brake fluid should be stored indoors to prevent the sun and rain, and be careful not to mix in petroleum products and moisture to avoid delamination and deterioration. The containers are preferably glassware, and rubber containers and plastic buckets are not available. And should keep the seal clean.
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