Leybold Rotary Vane Pump SV300 950 31

Clean the oil cooler with compressed air

5.2 Maintenance Intervals / 5.4-C Oil Change, Replacing the Oil Filter

Ensure all tools and safety equipment are ready

Is the pump switched off but still at working temperature?

Unscrew the oil-drain plug (6/5) and let the used oil drain into a suitable container

Screw the oil-drain plug back in, briefly switch on the pump (max. 10s) and switch it off

Remove the oil-drain plug again and drain the remaining oil

Moisten the gasket of the new oil filter with oil and screw it in manually

Unscrew the oil-fill plug and fill the pump with fresh oil up to the bottom edge of the oil-level glass

5.2 Maintenance Intervals / 5.4-H Checking the Float Valve

Check if pressure falls below approx. 5 mbar during pump operation

Remove the fastening screws at the top of the pump-cylinder cover (7/51a-52a)

Loosen the pump foot (7/94a) at the bottom of the cover and take off the cover

Take off the oil return line (6/11)

Remove the four screws (6/12) and pull the float valve assembly (6/10a) out of the float chamber

Take adequate safety precautions when pumping harmful substances

Pour in clean oil up to the bottom edge of the oil-level glass and let the pump run for a few minutes

Drain the oil again and pour in clean oil up to the top edge of the oil-level glass

Confirm that special preservation or slushing oils are not necessary

5.2 Maintenance Intervals / 5.4-G Checking the Anti-Suckback Valve

Keep the anti-suckback valve clean to ensure proper operation of the pump

Is a dust filter installed upstream if exposed to large amounts of dust or dirt?

Remove the fastening screws at the top of the pump-cylinder cover (7/51a-52a)

Loosen the pump foot (7/94a) at the bottom of the cover and take off the cover

Remove four screws and take off the intake flange (7/57) and gasket (7/55)

Remove the spring and anti-suckback valve, and replace them if required