TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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3-5. Troubleshooting Starting System Malfunction 1. Starter will not operate. 2. Starter runs but will not crank engine. 3. Starter operates but fails to crank engine at proper cranking speed. Probable Cause a. Improper starting procedure being used. b. Starter not receiving electrical current. c. Failed starter. d. Failed starter relay. a. Failed starter drive gear. b. Failed starter drive clutch. a. Improper grade engine oil. b. Defective starter. c. Partially seized engine caused by tight engine bearings. 3-6. Troubleshooting Generating System 1. Generator runs but will not produce electrical current. 2. Generator does not turn or operate. 3-7. Troubleshooting Air 1. Restricted air to turbosup- erchargers (engine will not develop full power). a. Generator regulator not operating. b. Improperly connected generator cables. c. Generator not producing electrical current. a. Failed generator shaft. b. Generator drive gear failed. Intake System a. Plugged air cleaner. b. Collapsed air induction hose. c. Turbosuperchargers worn or fail to operate. d. Restrictions in air intake manifolds. Corrective Action a. Refer to pertinent vehicle Technical Manual, Appendix A for proper starting procedures. b. Refer to pertinent vehicle Technical Manual, Appendix A for procedures covering troubleshooting vehicle electrical system. c. Refer to 1b, para 3-4. d. Refer to 1b, para 3-7. a. Refer to 1c, para 3-4. b. Refer to 1b, para 3-4. a. Drain and refill with proper grade oil for prevailing temperature. b. Refer to 1b, para 3-4. c. Turn engine manually. If engine does not turn freely, disassemble engine and replace or repair damaged parts. Refer to pertinent vehicle Technical Manual, Appendix A for troubleshooting generator regulator. Refer to pertinent vehicle Technical Manual, Appendix A for correct cable connections and procedures. Remove generator (table 4-1). Refer to TM 9-2920-224-35 and overhaul generator. Install generator (table 4-1). Replace generator, Refer to 1c, above. Remove generator (table 4-1). Remove generator drive adapter and drive gearshaft (table 5-10). Rebuild adapters and drive gearshaft (table 6-1). Check generator idler gears in crankcase for damaged teeth. If damaged, disassemble engine and remove idler gear. Install new gear (table 7-1) and assemble engine. Install generator (table 4- 1). a. Service air cleaner. Refer to pertinent vehicle Technical Manual, Appendix A for procedures. b. Repair or replace air induction hose. Refer to pertinent vehicle Technical Manual, Appendix A for procedures. c. Remove turbosuperchargers (table 4-1). Refer to TM 9-2990-200-34 for overhaul instructions. Install turbosuperchargers (table 4-1). d. Remove intake manifolds (table 4-4). Remove restrictions. Install intake manifolds (table 4-4). 3-7