As we all know, automatic transmission is a high-precision power transmission device, which is equipped with many precise components, such as hydraulic torque converter, sun gear, planetary gear, hydraulic control valve and complicated and tiny oil circuit. These components are very sensitive to pollutants and temperature changes. If there is no scientific maintenance, automatic transmission will have some faults, such as rough work, difficult shifting, slipping, friction plate ablation, etc., and the cost is often time-consuming and laborious maintenance and expensive maintenance. According to statistics, 90% of automatic transmission failures are caused by ATF pollution and deterioration. Aiming at the traditional maintenance methods, combined with the disassembly-free maintenance technology, this paper discusses the scientific maintenance of automatic transmission.
First of all, talk about some misunderstandings of traditional maintenance methods:
(1) When the vehicle is in a cold or flameout state, the ATF liquid level is not accurately checked.
(2) Do not pay attention to changing the ATF regularly, and usually remember to change the oil only when the vehicle is rough, difficult to shift gears and skidding, which lacks daily maintenance.
(3) The oil change method is usually to remove the small hole in the oil pan of the automatic transmission to drain the oil, or to extract a small part of the old oil from the inspection hole of the dipstick, but most of the old oil and sludge remaining in the torque converter, radiator and small oil circuit cannot be removed, which is not only complicated in operation, but also unsatisfactory in oil change effect, and the oil change rate is only 25%.
(4) The internal leakage and external leakage caused by the aging of rubber seals can only be carried out by disassembling and replacing parts, which is complicated in operation and will destroy the original seal and cooperation.
(5) Not paying enough attention to the classification and selection of special hydraulic oil for automatic transmission. The wrong choice of friction and non-friction will often lead to rough and slippery work during gear shifting and shorten the service life of automatic transmission.
Scientific maintenance methods are as follows:
(1) Correct inspection method of ATF liquid level: park the vehicle on a flat road when the hot car is idling, first fill all gears with oil, and then put the shift handle in the P position, and the liquid level is within the scale line of the hot car (Honda car flameout inspection).
(2) The oil change of ATF shall be carried out in strict accordance with the user manual. Under normal conditions, it is generally 24 months or 48300km, and under bad conditions, it is generally 12 months or 2 10000km.
(3) Active plugging agent can be used for internal leakage and external leakage caused by aging of rubber sealing ring. For example, 6480 1, VIOS automatic anti-leakage agent.
(4) Use the 4)ATF correctly according to the user manual and the structure of the transmission. For some ATF which requires high friction characteristics and is difficult to buy in China, we can consider adding protective leakage stopping agent. For example, the leak-proof protective agent for power lion automatic transmission can improve the friction characteristics of ATF and prolong its service life.
(5) The replacement of ATF must be carried out with professional cleaning agent, professional equipment and professional technology. Firstly, connect the equipment in series with the radiator of the automatic transmission through the quick connector, and then add the cleaning agent. Put the gear lever in different gears, change the engine speed, make the transmission work under various working conditions, and thoroughly clean the whole hydraulic system with equipment. Finally, the equipment is filled with new liquid, and the old liquid is completely replaced. Power lion's automatic transmission cleaning equipment #0860 1 can complete the above process quickly and efficiently. The whole operation process can be completed in about 20 minutes, and the replacement rate is almost 100%.
In fact, the performance of automatic transmission is relatively stable, especially for high-end imported cars. As long as we pay attention to the scientific maintenance of automatic transmission in daily maintenance, many losses can be completely avoided.