TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download

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TM 9-2815-220-34 M1l func1ion 17. Vehicle Air Cleaner Blower Inopera- tive 17.1 Motor inoperative: 18. Engine Time Totalii.ing Meter ln· operative 18.l Totalizing meter inoperative. 19. w Power Investigation Table 2·2. Troubleshꝏti ocedures -C o ntinued Pr o bable cau.e a. Generator not charging. b. Blower molor electric circuit defective. c. Blower motor failure. a. Generator inoperative. b. Wiring defective. c. Totalizing meter defective. NOTE t i ve <lion a. Check operation of generator, regula- tor, and relaled circuits. Reler to item 15.1. b. Check circuits. Refer lo pertinenl veh cle technical manual. Repair or replace as required. cl. Refer to DT-7.1 c2. Replace motor. Refer to pertinent vehicle technical manual. a. Check generator. Refer to item 15.1. b. Check circuit voltage to totalizing meter lead. Refer to pertinent vehi- cle technical manual. c. Replace totalizing meter (para 3-8). When low power or pꝏr vehicle performance is reported, an enne "stall" speed test will indicate whether the malfunction is engine or vehicle related. If a rough, noisy, or overheated engine is siated with the reported low power, prior correction of these malfunc- tions often will eliminate the pꝏr performance and, in addition, may prevent further damage lo the engine. 19.l Preliminary investigation: a. Engine rough operation. a. Refer item 9. 19.2 Power verification: (Perform engine "stall" lesl in accordance with DT-15.2) 19.3 w stall with th banks firing and normal smoke: 2-22 Change 2 b. Engine noisy. b. Refer to item 10. c. Engine overheating. c. Refer to item 12. a. If stall speed is normal (1P0·192 rpm), al. Investigate transmission clutches, low performance is vehicle related or brakes, and vehicle suspension for vehicle may be operating under 1•ere being lꝏ tight. Repair as required. conditions. Refer to pertinent vehi.de technical manual. b. If stall speed is ave normal (more than 1950 rpm) low performanc e is transmission related, o r engine is over- powered. c. If st.all speed is below normal (less then 1P0 rpm) low performance is engine related. . a. In-tank fuel pump inoperative. b. ThroUle travel limited. c. Water contaminated fuel or improper fuel. d. Fuel filter restriction. (dirty) e .. Fuel return restriction. f. Fuel supply leaks. g. Governor high-idle adjustment improper. a2. Check chicle performance on hard road, and if performance is satisfac- tory, limit vehicle operation under severe condition to short peris of operation. Possible enne damage may  prevented. bl. Investigate for transmiion slippage. Refer to vehicle technical manual. b2. Refer to item 14.6, d. c. Preed with engine low power in- vestigation. Refer lo item 19.3. a. Check in-tank fuel pump operation. Refer lo item 14.4. Repair  r quired. b. Inspect accelerator and throttle linkages. Refer to item 14.3, b. Repair  required. c. Check fuel system for water ntent. d. e. {. g. Refer to item 14.2. rvice  re· quired. Refer to pertinent vehicle chnical manual for proper fuel specification. Inspect fuel filters. (Refer item 14.5). rvice filte  required. Inspect fuel return. Refer to item 14.11. Repair as required. Inspect for leaks and rep . air. Check high-idle operation. Refer to item 14.6, b. Replace fuel injection pump (para 2-21).