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TM   5-2815-241-34&P CYLINDER  BLOCK  -  CONTINUED ACTION LOCATION ITEM REMARKS REPAIR  -  CONTINUED NOTE Steps 24 and 26 are provided for cylinder block if tagged for resurfacing. 25. Cylinder  block  (1) 26. a. Position main bearing pads (2) of cylinder  block  on  milling  machine. b. Remove  grooved  headless  pins  (3)  from cylinder head mounting surface (4). WARNING Due to excessive weight, assistance will be needed to prevent personal injury when lifting  heavy  parts. CAUTION When resurfacing cylinder block, do not remove so much material that the height, A, from the centerline of the main bearing bore to the top surface of the cylinder block is less  than  18.994  inches  (482.448  mm),  or  cylinder  block  will  become  unusable. NOTE Cylinder  block  may  be  salvaged  by  removing  a  maximum  of  0.010  inch  (0.25  mm)  of material  from  the  top  surface. c. Using a milling machine, remove only enough  material  from  top  of  cylinder block  to  repair  damage. Cylinder  block  (1) Remove from milling machine. NOTE The following step is provided for cylinder head capscrew threads tagged for repair. 27. Cylinder block (1) Cylinder  head capscrew  hole  (5) a. Using a dial indicator depth gage with a 1/4-inch wide blade seated in center taper of hole (5), determine depth of hole. If  depth  is  2  11/32  inches  (59.53  mm) deep,  proceed  to  steps  b,c,d,  and  e. If depth is 2 9/18 inches (85.09 mm) deep,  proceed to steps f, g, and h. 2-154


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