TM 10-3930-671-24 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 installation, position wiping rag under fuel shut off valve to catch any spilled fuel. (3) To install fuel shutoff valve (1), proceed as follows: (a) Apply sealant to threads of fitting (9) and fitting (17). (b) Install fitting (9) and fitting (17) on fuel shutoff valve (1) as tagged during removal. (c) Apply sealant to threads of three fittings (3, 6, and 7). (d) Install two fittings (3 and 6) on fitting (17). (e) Install fitting (7) on fuel shutoff valve (1). (f) Install fuel shutoff valve (1) on shield (16) with two screws (14), plate (15), two spacers (13), and two nuts (12).  Tighten screws 75-85 lb-in (8-10 Norm). (g) Install handle (11) on fuel shutoff valve (1) with screw (10). (h) Install fuel line (8) on fitting (9). 3-26