ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 3-26.  FUEL LINES. 3-26.1.  Removal. Warning Diesel  fuel  is  flammable  and  toxic  to  eyes,  skin,  and  respiratory  tract.    Skin/eye  protection required.  Avoid repeated/prolonged contact.  Good general ventilation Is normally adequate. CAUTION Always use two wrenches when removing/installing fittings and/or fuel lines to avoid damage. NOTE Catch fuel in suitable container. a. If necessary, remove fuel line (11, FIGURE 3-40) by disconnecting it at fuel injection pump using two wrenches. Remove capscrew (25) securing clamp (26) and remove fuel line. b. If necessary, remove fuel line (9) by disconnecting it at elbows (10 and 24). c. Remove two loop clamps (1, FIGURE 3-41). d. Remove loop clamp (2). e. At cylinder No.  4 fuel injector, loosen coupling nut (3) and disconnect return line to fuel tank.  Remove coupling nut (3) and bushing (4).  Discard bushing (4). f. Between  injectors  Nos.    3  and  4,  loosen  coupling  nuts  (5)  and  disconnect  return  tube  (6).    Remove  nuts  (5). Disconnect other end of tube (6) from fitting (15). g. Loosen coupling nuts (8) securing tubes (10) to injectors.  Remove tubes (10), coupling nuts (8),  rivet (7), and bushings (9).  Discard bushings (9). h. Tag and disconnect four fuel injection lines (11, 12, 13, and 14) from fuel injectors and fuel injection pump. i. Cap all openings. 3-26.2.  Inspection. a. Inspect all fuel lines for wear, kinks, or fitting damage.  Replace as necessary. b. Ensure all connections are open. 3-26.3.  Installation. CAUTION Always use two wrenches when Installing fittings and/or fuel lines to avoid damage. a. Remove all caps and connect four fuel injection lines (11, 12, 13, and 14, FIGURE 3-41) to fuel injectors and fuel injection pump as tagged during removal. 3-76