The reasons for cylinder pulling are very complex, including design reasons, such as the selection of materials, determination of clearance size, whether the installation of devices is appropriate, whether the structural layout is reasonable, whether the surface roughness is appropriate, and whether the lubrication and cooling arrangements are perfect. From the perspective of management, the following reasons may be responsible:

(1) Poor lubrication of cylinder:

The cylinder is short of lubricating oil or the oil supply is interrupted, and the cylinder is pulled due to direct metal contact The reasons for poor cylinder lubrication include: too little oil in the oil pan or poor oil quality, too high temperature of the diesel engine, or damage or failure of the piston ring (mainly the oil ring).

(2) Insufficient running in:

To get effective running in in the shortest possible time, the running in time and load distribution must be considered Running in cannot be completed even if it takes a long time under low load. If it is urgent to run under high load, it will cause cylinder scuffing Therefore, during the running in period of diesel engine, attention should be paid to: properly increase the fuel injection amount during the running in period; After the piston ring is replaced, it shall be operated under low load for a period of time; After the piston and cylinder liner are renewed, they should be run in before increasing the load.