Engine maintenance It is believed that everyone understands that the effect of vehicle performance and driving quality after oil change is immediate, so many users also pay attention to regular maintenance. However, like the maintenance of the gearbox and the rear axle, some users are a little despised. Heavy-duty gearboxes, even if it is a long oil change, manufacturers generally recommend changing the oil cycle is only 100,000 kilometers. However, many users will think that the oil change cycle is conservative, and 200,000 kilometers can never be exchanged. Some old drivers will tell you through past experience that there is no problem if the gearbox does not change oil to 500,000 kilometers or even if the vehicle is scrapped. If a certain gear collapses, it will take over 2,000 to go overhauled. Some gearboxes have three to four hundred thousand kilometers of oil change, driving is not easy to feel, but the gearbox is really not a problem? In order to save maintenance costs, is it worthwhile to encourage maintenance? Earlier, the Dongfeng Tianlong ZF gearbox with users did not change oil for a long time, the 4th gear of the countershaft was damaged, and overhaul took more than 3,000. Cardmates commented that there are two reasons for tooth fractures. One is the lack of gear hardness and the second is improper operation. Gear oil is important but not the main cause. Although reasonable in view, it must be based on proper maintenance. The role of gear oil is lubrication and cooling. If the transmission does not change oil 500,000 kilometers, even if the gear has not been damaged, the internal parts, including shafts and gears, have in fact been affected in intensity and have declined more than normal maintenance. Faster. One of the gears in the overhaul was replaced due to damage. The other internal parts seem to be intact, and in fact only the potential risk of damage is not revealed. The damage to a single gear like this gearbox is not a big problem, and the maintenance price is not too high. To liberate the 12-speed transmission, for example, Guangzhou, a 4S shop service station reported the maintenance price, parts processing is about 4,000 or so, not in the 4S maintenance, then the price is much lower, the following 3,000 prices can get. Therefore, some people think that if one does not change oil for 500,000 kilometers, it will only be a bad tooth, and overhaul is lower than the maintenance price during this period. This is also the value. Is this really the case? Don't forget to mention above that even if only one tooth is broken at the moment, because the strength of other parts is also reduced due to lack of lubrication and cooling over a long period of time, the subsequent bad situation may be that other gears and even the shaft is damaged. . The car is bad on the road. Loss of time and efficiency is also a waste of time. It is not worth the effort. Knowing how to maintain it properly can greatly reduce this situation.
Valves is one of the key components that affect engine reliability and safety. It's mainly used to start and shut down the intake and exhaust passages during engine operation, to control the intake of fuel mixture or air and the discharge of exhaust gases. . The working environment of the valve and Valve Seat is very harsh. In addition to the corrosion of high temperature gas, it also bears the impact of the burst pressure in the cylinder.
The material of the valve is usually divided into 40Cr, 4Cr9Si2, 4Cr10Si2Mo, 21-4N and 23-8N in China. 5Cr8Si2, 4Cr9Si3, 21-2N, 21-12N, 23-8N, XB, etc. have been used in large quantities on some imported models. High-temperature nickel-based alloys are also being used on high-load diesel exhaust valves.
Truck Engine Valve,Truck Diesel Engine Valve,Exhaust Valve For Engine,Truck Generator Set Engine Valves Hebei Zhonghai Shipping Accessories Manufacturing Co., Ltd. , https://www.zhonghaiship.com
