TM 9-2320-209-20-3-1 f. Assembly of Secondary and Final Fuel Filters. NOTE This task is the same for secondary fuel filter and final fuel filter. This task is shown for final fuel filter. 1. Using 9/16-inch wrench, screw in and tighten drain cock (1). 2. Put spring (2), washer (3), gasket (4), and cup (5) on post (6) as shown. 3. Press down on cup (5) and using long nose pliers, put cotter pin (7) through hole in post (6) and bend open ends of cotter pin. 4. Put filter element (8) into filter housing (9) . GO TO FRAME 2 TA 047517 4-69