TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-l FUEL SYSTEM r KNOWN INFO I ENGINE DOESN’T STAY RUNNING POSSIBLE PROBLE.hlS FUEL PUMP FUEL SUPPLY LINES FUEL RETURN LINES FUEL FILTER FUEL SOLENOID/WIRING HIGH-PRESSURE SYSTEM FUEL PUMP ?UEL SUPPLY LINES FUEL RETURN LINES FUEL FILTER FUEL SOLENOID/WIRING HIGH-PRESSURE SYSTEM KNOWN INFO FUEL PUMP OK FUEL SUPPLY LINES OK FUEL FILTER OK DISCONNECT THE GLOW PLUG CONTROLLER AND WIRE 5698 FROM THE INJECTOR PUMP. MAKE SURE THAT WIRE 54A IS PROPERLY CONNECTED TO THE INJECTOR PUMP. WITH THE ROTARY SWITCH IN RUN POSITION, DO YOU HAVE AT LEAST 17.0 VOLTS DC FLOWING THROUGH WIRE 54A? DIAGNOSTIC FLOWCHART ;T OPTIONS STE/lCE-R TEST 89 (Page 2-508) MULTIMETER REASON FOR QUESTION Current through the wire quickly checks the integrity of the fuel system wiring. The normal reading will be about 1.3 to 1.5 amps. RECONNECT THE ABOVE WIRES. CHECK FUEL PUMP PRESSURE AND VOLUME DURING CRANKING. IS PUMP PRESSURE GREATER THAN 3 PSI (20.69 kPa) AND FUEL VOLUME AT THE INJECTION PUMP INLET 1 PINT IN 30 SECONDS? 1. STE/ICE-R TEST 24 (Page 2-494) 2. FUEL PUMP VOLUME TEST REASON FOR QUESTION Positive pressure and volume indicate that fuel is present and supply lines and filter are not plugged. This is a test of the lift pump. 0 II . . 83 TEST OPTIONS DOES THE ENGINE START AND PUT THE RETURN LINE IN A STAY RUNNING WITH THE FUEL SUITABLE CONTAINER AND RETURN LINE (THE SHORT TRY STARTING THE ENGINE. RUBBER LINE AT THE INJECTOR PUMP) DISCONNECTED? REASON FOR QUESTION A restricted fuel return line will I I cause a pressure imbalance in the pump and prevent the engine 2-110