Gardner Denver L55 User And Service Manual page 44

Every 4000 hours operation or 12 months
1. Visually check for leakage on the shaft seal, replace as required. See the parts lists for the kit part number and for the
tool kit part number. The tool kit is required to change the oil seal. If the oil seal is a lip seal, the wear sleeve must
always be replaced.
2. Replace lubricant every 8000 hours **.
Under adverse conditions, change more frequently (refer to "Oil Change Interval", in Section 10.4). Flush system if
required.
3. Replace Air/Oil Separator, operating conditions determine the frequency of service. The air/oil separator will need to
be changed as indicated by the GD Pilot, every 4000 hours or every year, whichever occurs first. See "Changing the
fine oil separator" in Section 10.6 for further details.
4. Inspect the scavenge line, replace the check valve, clean the scavenge line if necessary.
5. Inspect the inlet valve, service if necessary, see parts list for repair kit part number.
6. Inspect minimum pressure/check valve operation, repair if necessary. See Fig. 2 "Minimum Discharge
Pressure/Check Valve".
7. Check pressure relief valve, see Section 10.8.
8. Inspect the condensate drain, repair if necessary.
** Check Section 10.4 for specific lubricant basic life, based on actual lubricant in the package.
Every 8000 hours operation or 24 months
1. Inspect solenoid valves /vacuum switch operation, replace if necessary.
2. Inspect blow-down valve operation, replace if necessary.
3. Inspect thermistor probes operation, replace if necessary.
4. Inspect pressure transducer, replace if necessary.
5. Inspect control valves and pressure regulator, replace if necessary.
6. Inspect thermal mixing valve operation, replace element if necessary. See Fig. 2 "Thermal Mixing Valve" and
"Compressor Oil System Check".
7. Inspect, replace if necessary the drive coupling spider (coupling element). See Section 7
8. Inspect hoses, replace if necessary.
42 August 20, 2018