indicated. Screw the assembly into the locking ring.
8. Evacuate the filter/piping a ssembly.
9. Open the isola tion valves.
FA Style Compresso rs
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 pre ssure in the oil filter by op ening the Schrader val ve on the
oil filter housin g. Run a hose from the valve t o a bucket t o catch the oil. Check to ensur e
that the check valve is prope rly seating.
3. Loosen the fil ter holding cl amp (Item 3).
4. Rotate filter nut (It em 4) c oun terclockwise to rem ov e filter housing. Keep t he filter housing
upright to avoid oil sp ill .
5. Drain the oil; remove an d replace filter cart r id ges. Do not use any of the ex tra felt washers
supplied with the fil te rs.
6. Bench assemble Item s A - D upsi de down. Then slide filt er housing (Item 5) over t he stack
to ensure that spring (It em D) is centered in the bo tt om of the filter housing as indi cated.
7. Evacuate air from the fi lter assembly. Open th e isolation valve.