TM 9-2320-361-20 3-29. SECONDARY AND FINAL FUEL FILTERS TESTING AND MAINTENANCE (Contd) c. Fuel Filter Head, Secondary, and Final Fuel Filters Removal NOTE Tag fuel lines for installation. 1. Disconnect three fuel lines (4) and fuel line (7) from three elbows (3) and elbow (8). 2. Remove three elbows (3), elbow (8), and tee (9) from fuel filter head (2). 3. Remove three nuts (6), lockwashers (5), and fuel filter head (2) from engine (1). Discard lock- washers (5). d. Fuel Filters Removal NOTE Some fuel filters have two bleeder valves. 1. Remove bleeder valve (11) from fuel filter head (2). NOTE Secondary and final fuel filters are replaced the same way. 2. Remove sleeve nut (10), washer (23), and gasket (22) from fuel filter head (2). Discard gasket (22). 3. Remove secondary fuel filter housing (18) and gasket (21) from filter head (2). Discard gasket (21). 4. Remove filter element (20) from secondary fuel filter housing (18). Discard filter element (20). 5. Remove cotter pin (17) from center post (12). Discard cotter pin (17). 6. Remove cup (13), gasket (14), washer (15), and spring (16) from center post (12). Discard gasket (14). 7. Remove draincock (19) from secondary fuel filter housing (18). e. Cleaning and Inspection WARNING Drycleaning solvent is flammable and will not be used near open flame. Use only in well-ventilated places. Failure to do so may result in injury to personnel. 1. Clean all components with drycleaning solvent and dry with clean rag. 2. Inspect elbows (3) and (8), tee (9), and center post (12) for burrs and stripped threads. 3. Inspect filter head (2) and filter housing (18) for burrs and scratches on mating surfaces. f. Fuel Filters Installation 1. Install draincock (19) on secondary fuel filter housing (18). 2. Install spring (16), new washer (15), new gasket (14), and cup (13) on center post (12). 3. Install new cotter pin (17) in center post (12). 4. Install new filter element (20) on secondary fuel filter housing (18). 5. Install secondary fuel filter housing (18) and new gasket (21) on fuel filter head (2) with new gasket (22), new washer (23), and sleeve nut (10). Tighten sleeve nut (10) 15 lb-ft (20.3 N·m). 3-56