TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0008 00 0008 00-3 MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. ENGINE WILL NOT CRANK (Contd) 12. Test run engine. 13. Test run engine. 1. If engine operates with unusual sounds or vibration, refer to WP 0008 00, table 1, malfunction 16 and 17. 2. If engine exhaust color remains white during test run, remove cylinder heads and gaskets and inspect for damage. Replace defective parts (WP 0027 00). If engine exhaust color remains white during test run, replace engine (WP 0046 00). 2. STARTER CRANKS ENGINE SLOWLY 1. Check electrical system for proper voltages (WP 0012 00, table 2, malfunction 2). 2. Check fuel injection pump for seizure (WP 0008 00, table 1, malfunction 1, step 1). 3. Check internal engine components for seizure (WP 0008 00 malfunction 1, step 4). Replace defective components as necessary. Replace fuel injection pump if necessary (WP 0069 00). Replace engine if necessary (WP 0046 00). 3. ENGINE CRANKS BUT WILL NOT START 1. Check fuel delivery system (WP 0008 00, table 2, malfunctions 1 through 3). 2. Visually check valve train operation and that valve lash is within specifications (WP 0031 00). 3. Check engine cylinders for low compression readings (WP 0008 00, table 1, malfunction 11). Replace defective components as necessary. 1. If valve train is not operating properly, check camshaft and crankshaft gears for damaged or missing teeth. Remove timing cover (WP 0032 00) and replace both gears (TM 9-2815-210-34-2-1) if either gear is damaged. 2. If valve lash is not within specifications adjust valve lash (WP 0031 00). 3. If valve lash cannot be adjusted within specifications, check valve train components for wear or defects (WP 0031 00). Replace worn or defective components. 1. If compression readings are low or zero, perform wet compression test (WP 0008 00, table 1, malfunction 11). Table 1. Engine Troubleshooting Procedures (Contd).