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

TM 9-2815-220-34 Table 2-2. Tro11bleshootinc ocedures - Continued M11f+n<li<> n Engine Ovepeeds - Continued 6.2 Engine speed excessh·e with ac- celerator pedal released: 7. Engine Stops During eration 7.1 Stops gradually with ls of power and speed: (with accelerator pedal depred) 7.2 Slops suddenly: 8. Engine Fails to Shut wn 8.1 Fails to stop with electric fuel shut- off: 8.2 Fails to stop with manual fuel shut· off: rrabk uuw b. oling fans malfunction. c. Governor improperly adjusted. a. Accelerator or throttle stuck or din- nected. b. Fuel control stuck. c. Fuel injection pump governor defective. a. Out of fuel. b. Fuel system deficiency. a. t'ucl system deficiency. b. Engine internal failure. a. Electric fuel shut(( malfunction. b. ftive fuel injection pump governor. a. Manual fuel shutff malfunction. b. fective injection pump. a. Vehicle fuel shutff valve malfunction. t li<t •<li o n b. Inspect cꝏling fans and drives. Refer to ilem 12.1, e. Replace defective parts (para 2-21 ). c. Check adjustment (14.6, b). Replace fuel injection pump, governor. a. Inspect throttle linkage. Refer item 14.3, a. b. Refer to item 14.6, g. c •Replace fuel injection pump (para 2-21). a. Refuel. b. Refer to item 14. a. Refer to item 14. b. Check for engine damage. Refer to item . a. Refer to item 14.6, e. b. •Replace fuel injection pump (para 2-21). a. Check throttle linkage. Refer to item 14.6, f. b. •Replace fuel injection pump (para 2-21). 3. Iפct fuel shutff valve. Replace as required. I 8.3 Fails to stop when \'Chicle fuel supply is shut off: {enne will continue to run for 12 to I 4 minutes at idle speed after the fuel is shut off) � --  � � � �� ���� � �� ���� � � ��� ���� �� ���� �� ��� 9. Egine Rough eration 9.1 Misfires: (more noticeable at idle 9.2 10. 10.l operalion) Vibration or roughne: Noisy cration Knk or tapping sound: 2-14 Change 3 a. Water contaminated fuel. b. gine operating al idle r extended peri during ld weather. '· Fuel leak, nole high pressure tube. d. Fuel injector nole de(ective. e; No valve rker clearance. f. Intake or exhaust valve failure {burned, worn or damaged). g. Return fuel Iine disconnect ed or restricted. h. F1ame heater lenoid defective. a. Engine misfire. b. Fuel injection ump defective. a. Rker arm assembly defective. b. Excessive intake or exhaust valve clearan or damage. c. nnecting , piston, or ring damage, or le piston pin. d Crankshaft aring damage. e. Worn or damaged gea or bearings. a. Check fuel for water. Refer to item 14.2. b. Incre engine idle speed to  . 1 rpm. c. Inspect for leak. Refer to item 14.9. d. Refer to item 14.8. el. ate faulty cylinder. Refer lo  8. e2. Adjust rkers lo proper clearance (para 2-51). (1. ate faulty cylinder. Refer to DT. . "Inspect, repair or replace valve and/or cylinder {para 3). g . Inspect fuel line. Refer to item 14.11. hl. Check solenoid operation. Refer lo DT-14.5 and DT-14.6, 3 and 6. h2. Replace solenoid. (para 2-43). a. Refer to item 9.1. b. Refer  itm 14.6. al. te faulty cylinder. Refer to l'-8. a2. •Adjust or replace rker arm (para 2-30). bl. ate faulty cylinder. Refer to DT-8. b2. Adjust valve clearance {para 2-51). . •Inspect, repair, or replace valve and/or cylinder (para 3). cl. ate faulty cylinder. Refer to DT-8.  Check for damage. Refer to item 4. d Check for damage. Refer to item 4. e. Check for damage. Refer to item 4.