Gardner Denver Screw Air Compressor L55-75D

Ensure the compressor is not powered before starting maintenance.

For L55RS-L75RS models, confirm the system is disconnected from the mains and wait 10 minutes before touching electrical components.

Press the STOP button on the control panel and wait until the compressor stops and is depressurized.

Verify the pressure gauge shows no more than 4.4 PSI.

Relieve the compressor unit by slowly opening the screw plug with integrated air vent slots.

Set the on-site main switch to '0' (OFF) and secure it against being switched on.

Check air/oil reservoir oil level and add oil if required.

Ensure the reservoir is completely drained

Verify all safety valves are operational

Check that all necessary equipment is available

Record the initial pressure reading

Is the pressure within the acceptable range before testing?

Conduct the strength test as per 97/23/EC guidelines

Visually check for leakage at shaft seal

Shut down the compressor and relieve the system of all pressure.

Disconnect, lockout, and tagout the power supply to the compressor package.

Ensure no oil is spilled during the procedure.

Check for leaks and address any spilled oil immediately.

Separator Replacement Procedure

Switch off the compressor and ensure it is depressurized by opening the ball valve at the after-cooler.

Detach the plastic oil extraction pipe.

Inspect and clean scavenge line, replace check valve if necessary

Inspect and service inlet valve if necessary

Inspect and re-grease motor bearings if necessary

Inspect and replace drive belts if necessary (if applicable)