The experience of the use of the engine shows that the North Baotou heavy truck parts piston ring wear and tear due to wear and tear the speed of the sealing effect, than the cylinder liner wear to the limit value of the speed. Baotou beiben heavy truck parts piston ring at work wear the fastest, the most serious is the first air ring. Because the first piston ring close to the combustion chamber, the viscosity of the engine oil at high temperatures, and even burned to form dry friction. At the same time, the high pressure gas makes the first piston ring tightly pressed on the lower plane of the annular groove, and the abrasion is aggravated. Under the action of the elastic force and the high pressure gas, the piston ring is tightly attached to the cylinder wall, which greatly increases the radial abrasion of the piston ring, and the elasticity of the piston ring is decreased. All of these will cause the sealing function of the piston ring decreases sharply, affects the performance of the engine, and the cylinder exhaust coke increased, a large number of blue smoke, and the oil outlet smoke phenomenon. At this time, in the case of cylinder wear, it is necessary to replace the piston ring to improve the technical performance of the engine, or between the two overhaul can replace the 1~2 piston ring.
Baotou beiben heavy truck parts in addition to the piston ring wear, and non normal damage, a new ring end gap such as backlash, minor change with too small or blocked off the coke ring, the engine is too tough, strong vibration and fracture caused by piston ring; minor ring change without scraping cylinder shoulder severing of piston ring. Where this must be promptly replaced, in order to prevent more serious consequences.