1. Open the vacuum pump and drive motor box cover (as shown in Figure 1.1) and observe the vacuum pump oil level, at least every two weeks. View the observation window with indicator on the side of the vacuum pump. When the vacuum pump is running, the oil level must be slightly higher than the oil level window 1\2. It is recommended to run the oil for 50-100 hours (maintenance according to actual working conditions).
2. If the vacuum pump oil is found to be contaminated and black. Emulsify or thicken and change oil in time. While changing the oil, the oil filter should be replaced and the pump cleaned before adding new oil. The steps of cleaning and changing the oil are as follows: In the first step, the power is cut off, and when the pump is in a hot state, the oil plug is opened and the oil is discharged; the second step is to screw the oil plug, connect the power supply, and start the vacuum pump to run 3- 5 seconds, then stop, then open the oil plug, the oil is drained; the third step, screw the oil plug, then open the fuel plug, pour the cleaning oil (32 ordinary mechanical oil) until the oil in the window Go to 3\4, then screw on the fuel plug; in the fourth step, start the vacuum pump for 2 minutes, stop the pump, open the drain plug, drain the oil, and repeat the operation several times until the mechanical oil is transparent. Like the new engine oil); the fifth step, re-add the new vacuum pump oil, the oil level to the oil window 3 \ 4.
