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TM    9-2815-202-34 4-38.   CYLINDER   HEAD   REPAIR   (Cont) CAUTION Turn  reamer  only  in  clockwise  direction,  both  when  inserting  and  removing  reamer. Movement  in  opposite  direction  will  dull  cutting  edges  on  flutes. 3. 4. 5. 6. 7. Turn  reamer  (97)  clockwise  (withdraw  reamer  frequently  to  remove  chips)  until lower shoulder of reamer contacts injector tube (93). Clean out all chips. Rotate cylinder head to bottom up position. Insert pilot of cutting tool (98) into small hole of injector tube (93). Apply a few drops of cutting oil on tool (98). Using a socket and speed handle, remove excess stock so lower end of injector tube (93) is from flush to 0.005 inch below  finished  surface  of  cylinder  head. Install injector gage (99) in injector tube. Using dial indicator gage (100), premeasure  distance  from  fire  deck  to  gage.  Reading  must  be  within  +/-0.014  inch of fire deck. Wash interior of injector tube (93) to prepare for second reaming operation. 4-202


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