TM-9-2320-280-10 HMMWV Operator Manual Download
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TM 9-2320-280-10 SECTION II. TROUBLESHOOTING 3-5. GENERAL Troubleshooting, table 3-1, contains instructions that will help the operator identify and correct simple vehicle malfunctions. The table also helps the operator identify major mechanical difficulties that must be referred to unit maintenance. The listing of possible malfunctions come under major vehicle headings. They are: • Engine • Heating system • Transmission • Transfer case • Brakes • Wheels and tires • Steering • Winch • Special purpose bodies 3-6. TROUBLESHOOTING PROCEDURES a. Table 3-1 lists the common malfunctions which you may find during the operation or maintenance of M998 series of vehicles or its components. You should perform the tests/inspections and corrective actions in the order listed. b. This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a malfunction is not listed or is not corrected by listed actions, notify your supervisor. CAUTION Entering water too fast will cause water to splash up over hood and into air intake. The engine may stop abruptly and will not crank. Do not continue starting efforts; damage to engine will result. NOTE • Hydrostatic lock is caused by the entry of substantial amounts of water into the engine through the air intake system and subsequent contamination of the fuel system. Hydrostatic lock most frequently occurs during or just after fording. Water is forced into the air intake system, is drawn into the engine, and effectively "locks-up" the engine. • Notify unit maintenance for further engine tests if you suspect hydrostatic lock. 3-2