CHAPTER 4: MAINTENANCE OF MAIN ENGINE FUEL, AIR INTAKE,TM 9-2350-256-20AND EXHAUST SYSTEMS4-14 REPLACE/REPAIR/SERVICE PRIMARY FUEL FILTER-Continued3Loosen retaining screw (3) and remove fuel filter head (4). Remove and discard filter head gasket (5).4Remove fuel filter element (6) from filter body (7). Discard fuel filter element.WARNINGDry-cleaning solvent used to clean parts is potentially dangerous to personnel andproperty. Do not use near open flame or excessive heat. Flashpoint of solvent is 1380F(590C).5Clean inside of filter body (7) with dry-cleaning solvent and stiff brush. Scrape off sludge or gum, if necessary.6Attach constant bleed line (2) and install new fuel filter element (6).7Install fuel filter head (4) using new filter head gasket (5), and tighten retaining screw (3).8Bleed air from primary fuel filter. Activate electric fuel pump until fuel runs from bleeder valve (1), then tighten bleeder valve.b. REMOVALWARNINGDo not smoke or use open flame when working on fuel system: explosion may occur, causing severeinjury or death.4—32
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