Quantcast CHAPTER  2 TROUBLESHOOTING   PROCEDURES

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TM   9-2815-202-34 CHAPTER  2 TROUBLESHOOTING   PROCEDURES Contents Para Page General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2-1 2-1 Preliminary  inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2-1 Malfunction, Test or Inspection, and Corrective Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2-2 Symptom   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2-2 Malfunction, Test or Inspection, and Corrective Action Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5 2-3 2-1.  GENERAL.  Troubleshooting  is  a  logical,  systematic  search  for  the  cause(s)  of  malfunction(s). Direct  Support  troubleshooting  of  the  engine  can  be  performed  with  the  engine  installed  in  the vehicle. NOTE When troubleshooting is performed with the engine in a  vehicle, the  information  in this manual will be used in conjunction with the information  contained  in  the  applicable  vehicle  type-20 maintenance   manual. The purpose of troubleshooting is to establish the nature and extent of repair required to return the engine  to  serviceable  condition.  Thorough  troubleshooting  before  the  engine  is  removed  from  the vehicle  may  reveal  malfunctions  external  to  the  engine.  Correction  of  such  external  malfunctions  may prevent the unnecessary effort of removing the engine. Troubleshooting  by  a  Direct  Support  shop  is  necessary  to  verify  the  diagnosis  made  before  the engine is removed. Such troubleshooting may be the only means of uncovering all defects in an engine  received  in  an  unserviceable  condition  from  another  activity. Troubleshooting  may  be  necessary  to  determine  the  cause  when  a  repaired  engine  fails  to  perform properly. 2-2.   PRELIMINARY   INSPECTION CAUTION Maintenance  personnel  must  have  a  thorough  knowledge  of vehicle  operation  before  attempting  to  troubleshoot  an  installed engine. The purpose and use of all operator controls must be thoroughly  understood.  Refer  to  applicable  vehicle  operators manual  for  procedures  concerning  operation  of  vehicle. Verification of all preliminary checks at crew and unit level should be made. If preliminary troubleshooting of the vehicle is not conclusive, refer to vehicle TM’s listed in App A for preliminary   inspections. 2-1


 


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