TM 10-3930-671-24 3-16. FUEL SYSTEM SERVICE. a. Fuel Filter Service. 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. (1) To remove fuel filter (1), proceed as follows: (a) Disconnect batteries (Para 3-25). NOTE Prior to removal, position wiping rag under filter to catch any spilled fuel. (b) Move two fasteners (2) outward and remove fuel filter (1) from fuel filter base (3).  Discard filter. NOTE Prior to installation, presoak fuel filter with fuel to aid in bleeding during initial startup of engine. (2) To install fuel filter (1), proceed as follows: (a) Install fuel filter (1) on fuel filter base (3) with two fasteners (2). (b) Connect batteries (Para 3-25). 3-21