Filter
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indicated. Screw the assembly into the locking ring.
8. Evacuate the filter/piping assembly.
9. Open the isolation valves.
FA Style Compressors
1. Turn off oil heater.
2. Close the line valve (Figure 44, Item 1) to isolate the oil filter(s).
Note: FA STYLE COMPRESSORS DO NOT HAVE ISOLATION VALVE NO. 2, ONLY A
CHECK VALVE. Vent the pressure in the oil filter by opening the Schrader valve on the
oil filter housing. Run a hose from the valve to a bucket to catch the oil. Check to ensure
that the check valve is properly seating.
3. Loosen the filter holding clamp (Item 3).
4. Rotate filter nut (Item 4) counterclockwise to remove filter housing. Keep the filter housing
upright to avoid oil spill.
5. Drain the oil; remove and replace filter cartridges. Do not use any of the extra felt washers
supplied with the filters.
6. Bench assemble Items A - D upside down. Then slide filter housing (Item 5) over the stack
to ensure that spring (Item D) is centered in the bottom of the filter housing as indicated.
7. Evacuate air from the filter assembly. Open the isolation valve.