Leybold Rotary Vane Pump SV300 955 36

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

Ensure all necessary tools are available

Ensure the pump is turned off and cooled down

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 retaining ring from inside the intake flange (7/57)

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-C Oil Change, Replacing the Oil Filter

Ensure the pump is switched off but still at working temperature

Use oil filter key (710 73 532)

Check for risk of oil polymerization by the connected process

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

Observe the safety regulations while draining oil

Screw the oil-drain plug back in when the flow of oil slows down

Briefly switch on the pump (max. 10s) and switch it off

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

5.2 Maintenance Intervals / 5.4-D Replacing the Exhaust Filters and Checking the Pressure Relief Valve

Check conditions for replacement

Remove the exhaust flange (6/2) with gasket (6/3)

Unscrew the lock nut (6/31) and remove spring between its both washers

Take out the exhaust filter element(s) (6/29)

Check that pressure relief valves move freely and seal properly

Reassemble in the reverse sequence

Ensure that the exhaust filter elements are properly centered and positioned

Install spring between its both washers, and tighten stop nut (6/31) fully home with the 10 mm box wrench