Incorrect practices in the use and maintenance of dredgers can cause damage to the dredger, threaten personal safety, and lead to decreased performance, accelerated wear (a basic type of component failure), and shortened lifespan. Overfilling the dredger with engine oil is a common mistake. When there is insufficient engine oil, bearings and journals will experience poor lubrication, accelerating wear (a basic type of component failure) and even causing bearing seizure. However, too much engine oil can also cause engine malfunctions. Excess oil will cause violent churning of the crankshaft and connecting rod during operation, increasing internal power loss in the dredger's engine. It will also increase the amount of oil splashed onto the cylinder walls, leading to oil burning and other problems. Therefore, the engine oil level should be kept between the upper and lower marks on the dipstick.
The quality of the lubricating oil in a dredger directly affects the engine's service life. New dredgers have very strict requirements for lubricating oil. The type of lubricating oil to use and how to change it should all be done according to the manufacturer's specifications. When selecting engine oil, both the quality grade and viscosity grade should be considered. First, select the performance level based on the compression ratio and displacement. Then, select the viscosity level based on the ambient temperature and load. Good engine oil ensures good engine lubrication, reduces wear (a basic type of component failure), reduces the frequency and difficulty of maintenance, and increases the dredger's service life. When choosing the viscosity of the engine oil for a dredger, the lowest possible viscosity should be selected while ensuring proper engine lubrication and sealing.
