The maintenance and service manual of LeyNow oil-type rotary vane vacuum pumps usually contains the following precautions to ensure the normal operation of the pump and extend its service life:

1. Oil level check:

Check the vacuum pump oil level regularly to make sure it is centered on the oil mark. Oil levels that are too high or too low can affect pump performance.

If the oil is found to have deteriorated, replace it with new oil in time. Under normal circumstances, the oil should be replaced every 3 to 6 months, but it depends on the actual use conditions and the performance requirements of the pump.

2. Cleaning and maintenance:

After the vacuum pump has been working for a certain period of time (such as 2000 hours), it should be inspected and repaired, including cleaning the parts in the vacuum pump cavity, such as rotors, vanes, springs, etc. After cleaning, it should be dried or wiped with a dry cloth.

Check the aging degree of the rubber seal and whether the exhaust valve plate is cracked. Clean the dirt deposited on the valve plate and exhaust valve seat.

3. Pipeline inspection:

Regularly check whether the vacuum pump pipes and connections are loose, and adjust them in time. And check the wear of the shaft sleeve. If the wear is large, it should be replaced in time.

Make sure the pipes are clear and have no blockages or leaks.

4. Bearing temperature:

Monitor the bearing temperature to ensure it does not exceed 35°C above the ambient temperature. Excessively high temperatures may indicate insufficient bearing lubrication or excessive wear.

5. Winter protection:

In the cold season, if the vacuum pump is out of use, the drain plug at the bottom of the pump body should be unscrewed and the medium drained out to prevent freezing cracking.

6. Abnormal sounds:

If the vacuum pump makes abnormal sounds during operation, stop the machine immediately and check the cause to avoid possible damage.

7. Trial run:

After reassembly, a trial run should be carried out, usually running dry for 2 hours and changing the oil twice. This is because a small amount of volatile matter may remain in the pump during cleaning.

8. Save the manual:

Make sure that the maintenance and service manual is always kept with the vacuum pump for easy reference by the operator.

9. Follow the manual:

Carry out maintenance and upkeep strictly in accordance with the instructions and recommendations in the manual. Do not attempt to repair or adjust unauthorized parts yourself.

10. Regular maintenance:

Develop and execute a regular maintenance schedule, including replacement of wear parts, inspection of electrical connections, verification of functionality of safety devices, etc.

Please note that the above is based on general vacuum pump care and maintenance recommendations. Specific manuals for your LeyNow vacuum pump may have detailed instructions and precautions for your specific model and design, so be sure to refer to and follow the manual provided with your pump.