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

 alfunction Noisy Operation -ntinued 10.2 Diesel Knk: ("ping", usually at low-idle speed) 10.3 Grinding or squeaking sound 11. Abnormal Exhaust Conditions 11.1. Excessive black smoke. (one or both banks): 11.2 Excessive bluuh smoke dung vehicle operation: (one or both banks) 11.3 White (greyish) smoke dung low· idle operation: (one or both bank) 11.4 Oily anor heavy carbon dea lta on vehicle rear gi<ill: 12. oling System Deflcienciea 12.1 Engine overheating: { evidenced by high oil temperature, low oil pressu and waing lights "ON"). . !I TM 9-281220·" Table 1-�. Trbleahooting Procedures - Continued Probable cause a. Manifold heater solenoid valves defective. b. Return fuel line disconnected or restcted. c . . Engine fuel iajection timin� a. Cꝏling fan interference. (Fan housing vane or foreign material). b. Engine accessories. c. Worn or d+maged gears, c+msht, rocker arm bearing or bushings. a. Induction air inlets blocked with debri s. b. Air cleaner restriction (clement dirty, wet or blower motor inoperative). c. Air Cleaner hose collapsed. d. Turbocharger air inlet blked th plastic plug, tape, rag, etc. (usually one bank only.) e. Turbocharger compressor housing clamp f.Turbocharger defective. (Sticky, wom or failed bearings, seals and damaged impeller.) g. Intake manifold system air leak (Lꝏse, broken, misalined or failed clamp, hose, tube flange, or gasekt.) h. Exhaust manifold leak. (Lꝏse flange, failed g asket; cracked or damaged manild or el ,. Fue ll\)ection pump timing incorrect. 7 j. Fuel injection pump fuel acljustment improפr (overfueled). k. Fuel iajection pump advance it . a. Hig h oil consumption. a. Engine operating at idle r exnded פriod dung cold weather. a. Exteal oil leaks. b. Excessive oil consumption. c Enne operating at idle for extended פod dung cold weather. a. Oil cꝏler screens and fins blocked with debris.  - - Correclie action al. Check solenoid operation. Refer to DT-14.5 and DT-14.6, 3 and 5. a2. Replace solenoid valve (para 23). b. Inspect fuel line. Refer to item 14.11. c Check timing(para 2-21). a. Inspect Inn r proper earance. Re•lair or replace damaged parts (p_r+ 2-21 b (25. b. Rcplnce dnmaged nccessory (section I. c. Check for damage. Refer to item 20. a. Inspect and clean air inlet grilles and nir cleaner inl ets. bl. Check restriction. Refer to OT-7. b2. Sen'ice ter (clean,  or replace). Refer to pertinent \'chide technical manual. c. Inspect, repair or replace. Refer to פrtinent vehicle technical manual. d. Inspect and clean. Refer to פrtinent ehicle technical manual. e. Tighten or replace clamp (para 2-'20b). (.Remove Inlet elbows (refer to pertinent vehicle technical manual) and check for bearing play or lꝏseness, impeller damage, or excessive carbon deposits on turbine wheel. Replace defecti\'e turbosu- percharger (para 2- 20 or 20.1). g . •inspect system r leaks and repair as necessary (para 2-28 and 2-20 or 2-20.1). h. Inspect exhaust manifold for leaks and repair as required (para 26). i. Check timing of fuel injection pump ( pD 2 - 2 1) . j. • Replace fuel injection pump (para  k. 'Replace adance unit (para 3-95). a. Refer to item 13.7, band f. a. Increase engine idle speed  1000· J200 rpm. a. Refer to item 13.7, a. b. Refer t o item 13. 7 c Increase engine idle speed to 1000- 1200 rpm. a Clean screens and oil cooler finned air psages. NOTE Inspect for oil leaks and aoid oil spillage . I I Change 1 2·15