Edwards Mechanical Booster Vacuum Pump EH 4200 60 Hz

!WARNING: Ensure correct oil grade and levels

Vent the pump to atmospheric pressure

Check the hydrokinetic drive/gearbox oil level

Cooling Water System Inspection

Check that the cooling water connections are secure

Inspect the cooling water pipelines and connections for corrosion, leaks, and damage

Check that the electrical connections are secure

Check the electrical supply cables for damage

Inspect all the vacuum pipelines for corrosion and damage

Check that all the vacuum connections are secure

Ensure the correct grade of oil is used and oil levels are correct.

Ensure pump internals are cleaned if converting from hydrocarbon to PFPE oil.

Vent the pump to atmospheric pressure.

Remove the hydrokinetic drive/gearbox oil filler plug.

Switch off the EH pump and isolate it from the electrical supply.

Vent the EH pump to atmospheric pressure.

Remove the four plastic cover caps from the bearing end cover.

Undo and remove the socket-head screws located under the four plastic cover caps.

Remove the end cover and O-ring. Dispose of the O-ring safely.

Note the exact location of the shims and spacers inside the end cover.