[Main reason for scrapping engine exhaust]
- excavator spare parts
- May 12, 2019
- 2 min read
1 The main reason for engine scrap is wear, in which the wear during start-up accounts for 42.4%~50.3% of the total wear. Because the engine is parked for more than 5h, the cylinder wall, piston rod set, valve train and other components The oil between the oil has flowed into the oil sump under the action of gravity, and the oil film has disappeared. If the engine is started immediately, there will be a direct friction between the movements for a period of time, which will intensify the wear. Especially in the cold. In winter, due to the large viscosity of the oil and the slow formation of the oil film, the wear will be more serious. Only when the engine starts for a certain period of time, the direct friction will disappear after the formation of the new oil film. In addition, the viscosity of the fuel in winter increases, just after the engine starts. Within seconds, the injector is prone to poor atomization, and the fuel will wash the cylinder wall, further destroying the oil film, causing a "dry grinding" phenomenon between the piston ring and the cylinder wall. This will greatly accelerate the wear of the cylinder wall and the piston ring. , shorten the life of the engine. Excavator spare parts
2 When the temperature of the cylinder wall is 5 °C, the amount of engine wear that is incorrectly started is equivalent to the wear of 60~80km of normal wheeled machinery or 0.5~1h of normal operation of the track machine; when the temperature of the cylinder wall is -15 At °C, the amount of wear of an incorrect start is equivalent to the wear of the wheeled machine for 150~210km or the normal operation of the track machine for 2-4h.
When starting the engine for the first time every day, you should do the following: Hydraulic spare parts
4. Perform regular inspections such as oil level and coolant level before starting.
Separate the working device to ensure that the engine is started without load.
. Pull the throttle lever to the quarter of the full throttle.
Start the engine and release the start switch as soon as the engine catches fire.
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