TM    5-2815-241-34&P CYLINDER  BLOCK  -  CONTINUED ACTION LOCATION ITEM REMARKS WARNING Safety goggles must be worn to prevent eye injury caused by flying steel chips. Particles blown by compressed air are hazardous. Make certain the air stream is directed away from user and other personnel in the area. Compressed air used for cleaning purposes shall not exceed 30 psi (207 kPa). User must wear safety goggles or face  shield  to  prevent  personnel  injury. b. Using  1/2-inch  portable  electric  drill and 23/32-inch drill bit, drill hole to a depth of 1 7/8 inches (47.63 mm). Using  ST-476  screw  thread  insert  kit, tap  hole  to  1  3/4-inch  (44.45  mm) depth. Clean all chips and shavings from hole with  compressed  air. Using  ST-476  screw  thread  insert  kit, install  screw  thread  insert  to  a  depth of  1/2  inch  (12.70  mm)  below  top surface of cylinder block (1). Using  1/2-inch  portable  electric  drill and 23/64-inch drill bit, drill hole to a depth of 2 1/16 inches (52.39 mm). Using  ST-476  screw  thread  insert  kit, tap  hole  to  1  15/16-inch  (49.21  mm) depth. Clean all chips and shavings with com- pressed  air  from  hole. Using  ST-476  screw  thread  insert  kit, install  screw  thread  insert  to  a  depth of  11/16  inch  (17.46  mm)  below  top surface  of  cylinder  block. C. d. e. f. g. h. i. 5 (TYPlCAL) TA   242435 2-155