(1) Remove the vacuum system from the rotary vane vacuum pump, raise the end of the chassis motor higher, open the drain plug to drain the oil, turn the vacuum pump, hold the exhaust port, and let the dirty oil in the chamber be discharged from the drain port. Add 100-500ml of new oil at the gas port and continue to rotate for 5-10 turns. The inside is cleaned. If this operation is 3-5 times, after the special oil is cleared, install the oil plug and put the pump flat. Add new oil to the air inlet and the oil hole respectively, and the oil change is completed.
(2) It is not advisable to start the motor for a long time when changing the oil, so as to avoid the exhaust valve flap jumping too much and fatigue.
(3) It is strictly forbidden to clean the pump by non-disassembly with kerosene, gasoline, alcohol, etc.
Note: The best oil temperature of the rotary vane vacuum pump is changed after the oil temperature rises.
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