TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 182 of 1205
TM 9-2320-387-24-l FUEL SYSTEM KNOWN INFO COLD ADVANCE OK DIAGNOSTIC FLOWCHART TEST OPTIONS ARE THE FUEL SUPPLY LINES OK? I REASON FOR QUESTION , [ Air leaks: lack pf fuel. or , restncted cneck valve can cause rough running at different speeds. POSSIBLE PROBLEMS FUEL LINES FUEL PUMP FUEL FILTER INJECTION PUMP INJECTORS RETURN CHECK VALVE [ KNOWN INFO SUPPLY LINES OK - OPTIONS ARE THE FUEL RETURN LINES OK? VISUAL POSSIBLE PROBLEMS REASON FOR QUESTION FUEL LINES FUEL PUMP FUEL FILTER fNJECTlON PUMP INJECTORS Restricted return lines or restricted check valve can cause the injection pump to malfunction. RETURN CHECK VALVE ,#(z&w KNOWN INFO =UEL PUMP OK POSSIBLE PROBLEMS INJECTION PUMP INJECTORS A COMPLETE CHECK OF THE INJECTION PUMP AND INJECTORS CANNOT BE DONE AT THIS LEVEL OF MAINTENANCE, BUT YOU HAVE COVERED MOST FUEL SYSTEM PROBLEMS THAT WOULD CAUSE THIS CONDITION. IF YOU STILL HAVE A PROBLEM, YOU MAY WANT TO RUN THE COMPRESSION/MECHANICAL TESTS BEFORE YOU NOTIFY DS MAINTENANCE (CHAPTER 14). COMPRESSlON/MECHANlCAL TESTS (Page 2-l 47) TEST OPTIONS 2-122