1) cement mill shall establish a registration card at random, record the name and brand of hydraulic oil required, and indicate the date and quantity of each refueling or oil change to avoid mixing of hydraulic oil in the work.

2) According to the operation instructions, clean or replace the hydraulic oil filter element regularly according to the actual use conditions, and check the hydraulic oil level every day. If it is insufficient, it should be supplemented in time. At the same time, air in the cement mill gydraulic system shall be removed according to the provisions of the mechanical operation manual to prevent the leakage caused by hydraulic oil pollution.

3) According to the use conditions, the oil sample analysis of hydraulic oil shall be conducted regularly. If the oil pollution is serious, the causes shall be found out immediately and eliminated in time.