TM 10-3930-671-24 e. Fuel Filter Unit Replacement. (1) To remove fuel filter unit, proceed as follows: (a) Disconnect batteries (Para 3-25). Fuel is very flammable and can explode easily.  To avoid serious injury or death, keep fuel away from open fire and keep fire extinguisher within easy reach when working with fuel.  Do not work on fuel system when engine is hot.  Fuel can be ignited by hot engine.  When working with fuel, post signs that read NO SMOKING WITHIN 50 FEET (15 m) of vehicle. NOTE • Prior to removal, position wiping rag under fuel lines to catch any spilled fuel. • Tag and mark all fittings and hoses prior to removal. • Note position and alignment of all fittings prior to removal. (b) Move two fasteners (1) outward and remove fuel filter (2) from fuel filter base (3).  Discard filter. (c) Remove two compression fittings (4) and seals (5) of fuel pipes (6 and 7) from fuel filter base (3).  Discard seals. (d) Remove two nuts (8), screws (9), and fuel filter base (3) from bracket (10). 3-35