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

) ) TM 9-2815-220-34 Section II. TROUBLESHOOTING. 4-4. Troubleshooting Procedures Troubleshooting procedures for the Clean r System arc in a tabular format. When an abnormal Dust Detector or Dust Ejector System condition exists, probable causes are listed. The causes are listed  order of most frequent occurrence or in logical sequence for case and time of accomplish- ment. Corrective actions arc listed r each probable cause. The actions are in logical sequence for accomplishment. Malfu11r.lion I. Abnormnl Operations of Dust De· t ector System (power plant warning lamp and dust detector warning lamps "ON", with pres· sure switch plungcr(s) visible. 2. Abnormal Operation of Dust Ejector System (air cleaner requires cleaning too often). Tab/ 4-1. Tro11blesltoo1l11g Procedures. Probable cause a. Restricted ftltcr strip. b. Loose or defective hose clamps on turbosupcrchargcr air inlet hose. c. Defective or missing seals at turbo· supercharger air inlet elbow or air cleaner air outlet elbow. d. Restricted orifices in turbosup�r- charger compressor housing and cover. e. Defective pressure switch. f. Dl!fcctive wiring hucss. g. Air cleaner access door seals dnmagcd or cam arm pins m or broken. h. Leak in engine induclion system ( t urbupcrchnrger compressor housing 31ld engine air induction mnnifold. i. Oil lcakngc from turbosupcrchnrgcr compressor side bearing and seal. j. Ingestion of recirculated smoke / fuel caused by mi s sing/broken uir cleaner access door seals or components. k. Ingestion of recirculated exhaust smoke caused by missing/broken air cleaner access door seuls or C0111JlOnents. I. Air cleaner filter dn3gcd or punc· lured due to installation, dis · aembly, or foreign objects. :1. Restricted air cleaner ( air dcnner rest riction Indicators have reached 30 inches 1120). b. Lenk in vehicle exhausl dust ejector system due to loose or missing clamps or dn111ugccl hoses nnd gaskets. c. Submergence exhaust pipe cap assc· bly napper restricting scavenge tube opening· due to flapper hinge pin worn or broken. Correc:tiH! action a. Service dust detector filter strip, rer to PNlincnt vhlclr technical manual. b. Repair or r�place  necc)s3ry. c. Refer to b. above. d. Rcmo,·c dust detector filter strip cover. Ocan all orifices and cavities. Service filler )trip, r�fer ton. above. e. Remove pressure switch (pora 4a. 2). Refrr to paragraph 4-11 c. and d. for operational check. If switch is inoperable, replace switch. f. l11spcct clcclricnl leads for broken wfr or damaged connectors. Oieck for continuity using a voIt m ctcr. Replace defective cable sembly (para 4·11 b.). g . Repair or replace as necessary, refer to pertinent vehicl e leehnical manual. h. l11spcc1 ngine turbouspcrchargcr and manifold system. Clean, tighten, or replace parts ns necessary (para 2·28 .) i. Repair turbosupcrcharger :is shown in T M 9 • 2 0 5 • 3 4 & I' , a n d TM9·2990·206·34&P, or replace turbosuper�harg�r (para. 2·20). j . Refer to a. nbOC. k. Service filter strip, a. abo,e. Refer to b. above. I. Service air deaner, refer to pertinent \'Chicle technical manual. a. Serce nir cleaner, refer to pcrtincnl vehicle technical nr11131. b. lnspct , clean, tigl11en, and replace parts as necessary. Refer to per· tinent \'Chicle technical manual. c. Rcplac as 1i.•ccssary. Rcr to per· tincnt vehicle technical m+11ual. Change 3 4.5