Maintenance Schedule - Gardner Denver L Series Original User And Service Manual

8.5

Maintenance Schedule

High Voltage
Hazard of shock, burn or death
 Work on the electrical equipment may be performed only by specialized electrical
technicians.
 Only units with Variable Frequency Drives, there is a risk of electric shocks due to charged
capacitors! Isolate the compressor and wait 10 minutes before touching any electrical parts.

Be careful of the hot surfaces of machine parts when carrying out checks, making settings and
doing maintenance.
Some parts of the system will still be pressurized after the system has been switched off. Small parts
propelled at high speed by compressed air can penetrate the skin or destroy an eye.
Only perform checks and maintenance after observing the following:

Press the STOP button on the control panel and wait until the screw compressor comes to a stop and
the screw compressor unit is depressurized.

The pressure gauge shows no more than < 4.4 PSI.

Shortly after shutting off the screw compressor unit a small residual pressure may remain.

Therefore, before any maintenance work, the screw compressor unit must be relieved by slowly
opening the screw plug (oil filling opening) with integrated air vent slots.
Set the on-site main switch to "0" (OFF) and secure it against being switched on.

Service Check List
Every 8 hours operation
1. Check air/oil reservoir oil level, add oil if required. DO NOT MIX LUBRICANTS.
2. Check operation of the machine, is it loading and unloading properly.
3. Check discharge pressure and temperature.
4. Check control panel for advisory text messages.
Every 125 hours operation
1. Check for dirt accumulation on oil/aftercooler core faces and the cooling fan. If cleaning is required,
clean the exterior fin surfaces of the cores by blowing compressed air carrying a nonflammable
safety solvent that will not damage aluminum in a direction opposite that of the cooling air flow. The
cleaning operation will keep the exterior cooling surfaces clean and ensure effective heat
dissipation.
Service Change List
Component
Oil Filter
Oil Sample
Lubricant
Air/Oil Separator
Inlet Air Filter
Control Box Filter
Cabinet Air Filter
Change Interval
Every 2000 hours or 6 months, whichever occurs first
Every 2000 hours or 6 months, whichever occurs first
Change per recommendations of the Oil Analysis or hour Life rating of lubricant or as
indicated by controller or 12 months, whichever occurs first
Every 4000 hours or 12 months, whichever occurs first
Every 2000 hours or 6 months, whichever occurs first
Every 2000 hours or 6 months, whichever occurs first
Every 2000 hours or 6 months, whichever occurs first
13-25-640 v00
DANGER
WARNING
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