CHAPTER 4: MAINTENANCE OF MAIN ENGINE FUEL, AIR INTAKE,TM 9-2350-256-20AND EXHAUST SYSTEMS4— 14 REPLACE/REPAIR/SERVICE PRIMARY FUEL FILTER-Continued1Clean all parts with dry-cleaning solvent. Scrape off any accumulated sludge or gum. If necessary, dry parts.2Check filter (9) for blockage. Filter orifice must be open.3Replace discarded and defective parts.e. ASSEMBLY1Install helical compression spring (37) in filter body (7).2Install new preformed packing (35) on retainer assembly (36) and place both in filter body (7).3Install new fuel filter element (6).4 Install bleeder valve (1) in fuel filter head (4).5Install flat washer (32), new gasket (33), nut (34), and retaining screw (31) on fuel filter head (4). Install new fuel filter head gasket (5) in fuel filter head.f. INSTALLATION1Install adapter (30) on elbow (29).2Install filter bracket (26) with two new lockwashers (28) and two screws (27).3Install primary fuel filter (8) in filter bracket (26) with two screws (25) and two new self-locking nuts (24).4Install bracket (22) with nut (23).5Install fuel filter inlet hose (16) with coupling (17) on bracket (22) with screw (18), clamp (19), flat washer (20), and nut (21).6Connect fuel filter outlet hose (15) and fuel filter inlet hose (16) to primary fuel filter (8).7Install constant bleed line (2), filter (9), screw (10), clamp (11), nipple (12), new lockwasher (13), and new locknut (14).8Bleed air from primary fuel filter (8) and fuel lines by loosening bleeder valve (1). Activate electric fuel pump until fuel runs from bleeder valve. Tighten bleeder valve.NOTEFollow-on maintenance:Install left front and center front air inlet grilles (see paragraph 9-57)4—34
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