TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download

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TM 9-2320-257-24-l COMPRESSION / MECHANICAL DIAGNOSTIC FLOWCHART BATTERY ClRCUlT OK STARTER CIRCUIT OK ENGINE NOT SE!ZED AIR AND FUEL TO ;T OPTIONS 1 DOES THE ENGINE SOUND NORMAL AND HAVE NORMAL VIBRATIONS AT ALL SPEEDS? REV THE ENGINE. DRIVE THE VEHICLE. 1 POSSIBLE PROBLEMS 1 REASON FOR QUESTION I I- ]I , The first indication of a mechanical problem is an abnormal noise or vibration. Before running other tests to check for engine problems, this is to try to make sure that you don’t make a bad problem worse. INTAKE/EXHAUST FUEL SYSTEM ENGINE L-l -t, 5 KNOWN INFO r OPTIONS STUICE-R TEST 14 (Page 2-493) BATTERY CIRCUIT OK STARTER CIRCUlT OK ENGINE NOT SEIZED AIR AND FUEL TO CYLINDERS FUEL SYSTEM OK INTAKE/EXHAUST OK DOES THE ENGINE PASS THE COMPRESSION UNBALANCE TEST? REASON FOR QUESTION If the engine fails the cylinder unbalance test, it indicates an individual cylinder problem such as a bad fuel injector, excessive blowby. etc. POSSIBLE PROBLEMS ENGINE KNOWN INFO TEST OPTIONS DOES THE ENGINE PASS THE POWER TEST? St-E/ICE-R TEST 13 (Page 2-492) REASON FOR QUESTION Loss of power can be caused by internal engine problems, fuel system, air intake/exhaust, or drivetrain problems. BATTERY CIRCUIT OK STARTER CIRCUIT OK ENGINE NOT SEIZED AIR AND FUEL TO CYLINDERS POSSIBLE PROBLEMS ENGINE FUEL SYSTEM INTAKE/EXHAUST IF YOU WERE SENT HERE FROM 2-l 50