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ARMY TM 92815-256-24 AIR FORCE TO 38G1-96-2 MARINE CORPS TM 2815-24/5 Section VIII.  FUEL SYSTEM MAINTENANCE Warning Escaping diesel fuel under pressure can have sufficient force to penetrate the skin, causing serious injury.  Before disconnecting fuel lines, be sure to relieve pressure. Before applying pressure to the system, be sure all connections are tight and lines, pipes, and hoses are not damaged.  Keep hands and body away from pinholes and nozzles which eject fuel under pressure.  Use a piece of cardboard or wood, rather than hands, to search for suspected leaks. Warning If  any  fluid  is  injected  into  the  skin,  it  must  be  surgically  removed  within  a  few  hours  by  a  doctor familiar with this type injury or gangrene can result. 3-23.  BLEEDING FUEL SYSTEM. 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. NOTE Catch fuel in suitable container. 3-23.1.  General. Any time fuel system has been opened up for service (lines disconnected or filter removed), it will be necessary to bleed air from system.  The fuel system can be bled at one of several locations. 3-23.2.  Bleed At Fuel Filter a. Loosen air bleed screw (17, FIGURE 3-58) on front of fuel filter. b. Operate  primer  lever  of  fuel  supply  pump  (22)  until  fuel  flow  is  free  from  air  bubbles.    Tighten  bleed  screw securely,  continue  operating  hand  primer  until  pumping  action  is  not  felt.    Push  hand  primer  inward  (toward block) as far as it will go. 3-23.3.  Bleed At Fuel Injection Pump. CAUTION Always use two wrenches when loosening or tightening fuel lines at nozzles and/or injection pump to avoid damage. 3-76


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