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 KNOWN INFO LOW FUEL PUMP PRESSURE POSSIBLE PROBLEMS FUEL PUMP FUEL FILTER FUEL LINES VENT LINES FUEL PRESSURE TRANSDUCER KNOWN INFO VENT LINES OK LOW FUEL PUMP PRESSURE POSSIBLE PROBLEMS FUEL PUMP FUEL LINES FUEL FILTER FUEL PRESSURE TRANSDUCER KNOWN INFO FUEL FILTER OK NO WAX BUILD-UP VENT LINES OK LOW FUEL PUMP PRESSURE FUEL LINES POSSIBLE PROBLEMS FUEL PUMP FUEL PRESSURE TRANSDUCER 2-116 LISTEN FOR A HISS WHEN YOU REMOVE THE FUEL FILLER CAP. CAN YOU REMOVE THE FILLER CAP WITHOUT HEARING A HISS? DIAGNOSTIC FLOWCHART OPTIONS VISUAL REASON FOR QUESTlON A plugged vent line will eventually cause enough negative pressure in the tank to prevent fuel flow. r I IS THE TEMPERATURE ABOVE 20°F (-7°C) ? r OPTIONS VISUAL REASON FOR QUESTION When the temperature is less than 20°F (-7%). wax flakes can build up on the fuel tank strainer or in the fuel filter. CHECK FOR A WAX BUILD-UP IN TANK STRAINER OR FILTER. USE AN ANTIWAX AGENT IF AVAILABLE. BLEED IF YOU USED THE DCA TO MEASURE FUEL SUPPLY PRESSURE, IS THE STUICE-R, DCA, AND TRANSDUCER OK? * OPTIONS 1. DCA TROUBLESHOOTING (Page 2479) 2. USE A PRESSURE GAUGE TC MEASURE FUEL SUPPLY. REASON FOR QUESTION Before condemning fuel pump, make sure that the pressure transducer is working. 1,