Maintenance
6. Close the valve on the adapter fitting used for charging.
7. Run the compressor for at least 30 minutes to heat the oil to operating temperature.
Stop the compressor.
8. Open the vent valve on the supply coupling of the compressor. Watch the compressor’s
pressure gauge. When the pressure falls to 0.35 to 0.7 bar (5 to 10 psig), close the vent
valve. Open the charge valve to increase the pressure to 15.2 bar (220 psig). Close the
charge valve.
9. Start the compressor
10. After running 30 to 45 seconds, stop the compressor. Open the vent valve and vent the
compressor to 0.35 to 0.70 bar (5 to 10 psig). Close the vent valve.
11. Repeat steps 8, 9 and 10 ten (10) times, and then go to Step 12.
12. Open the charge valve on the adapter fitting. Charge the compressor to the equalization
pressure. Close the charge valve.
13. Allow the compressor to cool. Read the pressure gauge with the compressor at 20° C
(68° F). Adjust the equalization pressure by charging or venting to conform to the
Specifications.
14. Close the gas cylinder valve and adjust the pressure regulator to zero psig.
15. Disconnect the charge line from the adapter fitting. Store the charge line to keep it clean.
16. Remove both adapter fittings.
17. If other components need cleaning, perform the appropriate procedures in their manuals.
Otherwise, reconnect the supply and return gas lines. Torque the gas line couplings to
47 ± 7 Nm (35 ± 5 ft. lbs.).
18. Leak check the Aeroquip couplings. See the Leak Check section.
This completes the gas cleanup procedure for the compressor.
Fuse Replacement
Tool required: Flat screwdriver
Fuses for the F-20L are located in the front panel of the electrical chassis of the compressor
Control circuit (FU-1, FU-2, FU-3 and FU-4 ) as shown in Figure 18:
a. Four (3) 1AT , 250V
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