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TM   5-3895-360-13 6-3.  ENGINE  CRANKSHAFT,  PISTON,  AND  CONNECTING  ROD  REPLACEMENT  (Con’t). h. i. j. k. l. m. n. Inspect connecting rod for cracks, breaks, and dam- aged threads. Restore damaged threads using die and tap threading set. NOTE Refer to Figure 6-14,  Measuring   Connecting o. Rod Bores, for steps i through n. Using inside caliper micrometer, measure piston pin bore diameter of connecting rod (7). Measurement must be 0.6870-0.6875 in. (17,4498-17.4625 mm). Replace connecting rod if measurement is not within specification. Place connecting-rod (7) in vise with caps, install connecting rod cap (10) on connecting rod (7) with two screws (11 ). Using inside caliper micrometer, measure bore di- ameter of connecting rod (7) and connecting rod cap (10).   Diameter   must   be   0.9399-0.9403   in. (23.8735-23.8836  mm). Remove two screws (11) and connecting rod cap (10) from connecting rod (7). Remove connecting rod (7) from vise. NOTE Refer to Figure 6-15,  Measuring  Crankshaft, for step o. Using outside caliper micrometer, measure connect- ing rod surface of crankshaft (9). Measurement must be  0.7493-0.7496  in,  (19.0322-19.0398  mm).  Re- place crankshaft if measurement is not within speci- fication. Figure  6-15.  Measuring  Crankshaft. p.  Using  inside  caliper  micrometer,  measure  cylinder bore diameter at three points: (1) Measure ¼ in. (6.35 mm) down from top of cylin- der. (2) Measure ¼ in. (6.35 cm) up from exhaust port. (3)  Measure 3/16 in.  (4.76  mm)  down  from  lower edge of intake port Figure 6-14. Measuring Connecting Rod Boxes. 6-12


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