Rotary vane vacuum pump is noisy:

　　(1) The rotary vane spring of the rotary vane vacuum pump is broken. Change the spring. (2) The assembly parts are loose. reinstall. (3) The parts have burrs and the assembly is deformed. Rebuild, regrind, replace parts. (4) The motor shaft is oil-free. Add lubricating oil.

　　Oil leakage of rotary vane vacuum pump:

　　(1) The seals of the rotary vane vacuum pump shaft hole, end cover, oil mark, oil tank and other parts are damaged or not pressed tightly. Replace the seal and tighten the screws. (2) There is a leak in the fuel tank. Plug the leaks.

　　Difficulty starting the rotary vane vacuum pump:

　　(1) The oil temperature is too low. Heated to above 15°C. (2) The lubrication in the pump is not good. Adjust the amount of oil. (3) There is no air in the pump cavity, and a large amount of oil enters the pump cavity. Deflate when the pump is stopped.

　　Rotary vane vacuum pump injection:

　　(1) The system is suddenly exposed to the atmosphere. Close the roughing valve and continue to open the valve. (2) Too much oil. Adjust the amount of oil. (3) The direction of rotation of the rotor is reversed. Reconnect the power, reverse direction.

　　Rotary vane vacuum pump does not pump air:

　　(1) The key of the pump impeller is broken, and the rotor does not rotate. Replace with a new key. (2) The cross joint of the double-stage rotor is broken, and the high vacuum stage does not rotate. replace. (3) The rotary vane vacuum pump does not open the air inlet valve. Open the valve. (4) The exhaust valve piece is broken. replace.