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ARMY TM 9-2815-252-24 AIR FORCE TO 38G1-92-2 e. Remove camshaft, refer to paragraph 3-29.1. f. Remove crankcase door, refer to paragraph 3-20.2.1. NOTE Oil pump does not need to be removed. g. Remove oil pressure relief valve and strainer, refer to paragraph 3-21.1. h. Remove pistons and connecting rods, refer to paragraph 3-30.1. i. Using a suitable puller, remove crankshaft pinion gear (8, FIGURE 3-40).  Remove key (9) from crankshaft (10). NOTE Use two flywheel bolts in end of crankshaft and a bar to hold crankshaft. j. Remove main bearing housing, refer to paragraph 3-32.1. k. Gently withdraw crankshaft (10) through flywheel end of crankcase. I. Remove  two  capscrews  (11)  securing  center  bearing  upper  housing  (12)  to  lower  housing  (13).    Remove  both housings (2 and 13) and bearings (14). m. If necessary, remove two dowel pins (15) from lower housing (13). n. Remove thrust bearings (16) from gear end of crankshaft (10). 3-33.2.   Inspect and Measure. a. Inspect all bearings for scoring or wear. b. If connecting rod big end has been disassembled because of failure of bearing, oil passages in crankshaft must be examined for obstruction and fragments of metal. c. Replace thrust bearings if they are damaged or worn. d. Check center bearing clearance using bearing gage (PLASTIGAGEPR1) as follows: (1) Place a piece of correct size bearing gage approximately 0.25 in.  (6.35 mm) off center across full width of one bearing shell. (2) Install bearing and torque bolts. CAUTION Ensure  crankshaft  Is  not  turned  when  bearing  gage  is  In  place,  and  all  traces  of  It  must  be removed before final assembly of bearings to prevent damage to crankshaft and bearings. (3) Remove bearing shell.  Compare width of bearing gage against scale printed on bearing gage container. Compare with values found in TABLE 3-7. e. Using  appropriate  measuring  devices,  check  components  listed  in  TABLE  3-7  for  wear.    Replace  components that exceed maximum clearance. f. Check crankshaft end play as follows: (1) Set a dial indicator so that actuating plunger makes contact with flywheel end face of crankshaft. (2) Push crankshaft firmly towards gear end of engine and zero indicator. (3) Push  crankshaft  firmly  towards  flywheel  end  of  engine  and  check  end  play.    This  should  be  0.0071  to 0.0149 in.  (0.18 to 0.38 mm).  End play is maintained by installing a single 0.0149 or 0.0197 in.  (0.38 or 0.50 mm) aluminum shim behind bearing housing flange. 3-77


 


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