TM 5-4320-302-146-20. CRANKSHAFT ASSEMBLY (CONT)Location/ItemActionRemarksMeasure bore with precision micrometer atpoints 1 and 2 and along axis A and B. Measure-ments should be 2.5984 to 2.5992 inches(66.00 to 66.019 mm). If all measurements arefar from within these tolerance limits, replacebearing bracket. If measurements are onlyslightly outside the tolerance limits, install newmain bearing supports and measure main bearingsupport bore; otherwise replace main bearingbracket.6-178
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