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Page Title: Section III. DIRECT SUPPORT TROUBLESHOOTING
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TM 10-4320-311-14 Section III.  DIRECT SUPPORT TROUBLESHOOTING INDEX Para Page 5-6 Scope ........................................................................................................................... 5-3 5-7 Direct support troubleshooting procedures..................................................................... 5-3 5-6.   Scope.  This level of troubleshooting contains checks and corrective maintenance actions which will isolate defects to  be  corrected  by  specific  maintenance  procedures.    Table  5-1  is  a  direct  support  troubleshooting  chart.    Symptoms listed in this table are accompanied by suggested tests or inspections which, in turn, suggest corrective action and the appropriate maintenance paragraph reference.  Corrective action sometimes suggests additional checks to confirm the troubled  area  or  further  localize  and  isolate  trouble  to  a  more  specific  component.    Maintenance  procedures  include removal,  cleaning,  inspection,  repair,  replacement,  and  assembly.    These  maintenance  procedures  can  be  found  in Section IV of this chapter. 5-7.      Direct  Support  Troubleshooting  Procedures.    The  following  paragraphs  briefly  explain  the  different  column headings of Table 5-1. a. Column 1 Malfunction Number.  This column of the table is a sequential listing of problematic symptoms.  The malfunction number is used for cross reference purposes and to avoid needless repetition. b.  Column 2 Test or Inspection.  This column of the table suggests further test or inspection checks to localize the symptom cause to a more specific area.  It allows corrective action flexibility depending on the outcome of these checks. c.  Column 3 Corrective Action.  This column of the table lists the corrective action to be taken and the paragraph reference to locate the step-by-step maintenance procedures to fix the fault. Table 5-1.  Direct Support Troubleshooting Chart MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. ENGINE WILL NOT START Step 1. Check fuel injection nozzle.  Check that diesel fuel reaches the fuel injection nozzle. Replace fuel injection nozzle.  (Refer to para 5-13.) Step 2. Check fuel injection pump Check that diesel fuel reaches the fuel injection pump. Adjust/replace fuel injection pump.  (Refer to para 5-14.) 2. BLACK SMOKE EXHAUST CAUTION Do not operate pump for more than 3 minutes without liquid in the volute. Step 1. Reduce load by removing suction hose from liquid. If color improves, refer to para 5-13 or 5-14. 5-3

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