First, only look at the amount of oil in the sump, do not pay attention to the quality of some operators only know the oil supplement, while ignoring the quality inspection. As everyone knows, long-term use of oil contains a large number of oxides and metal shavings, resulting in reduced lubricating properties, parts wear increased. Therefore, the engine should be regularly changed according to the specified cycle.
Second, only maintenance of air filters, maintenance of the exhaust pipe and muffler Some operators never clear the exhaust pipe and muffler carbon deposition, resulting in excessive carbon deposition, exhaust cross-sectional area decreases, resulting in incomplete exhaust emissions, Inadequate fresh air causes malfunction.
Third, the cooling water is only added. Regardless of the cooling effect, some operators never remove the scale. Although the cooling water is sufficient, the cooling effect is very poor, causing multiple failures.
Fourth, only pay attention to the quality of the plunger coupler and injector needle valve, do not pay attention to the quality of the output valve valve, the role of the oil valve is sealed, that is, the plunger oil chamber and high pressure tubing separated, so as not to return Second, the rapid decompression when the oil supply is stopped, ensuring that the fuel injection nozzle is completely cut off. Even if the delivery valve is of poor quality or worn out, it will cause many diesel engine failures.
Fifth, only pay attention to the state of the valve and valve seat, do not pay attention to the quality of the valve spring valve leakage, people used to check the valve and valve seat, while ignoring the valve spring quality inspection. The lack of elasticity of the valve spring is also one of the causes of valve leakage failure.
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