Quantcast FIGURE 5-69.  MEASURING MAIN THRUST JOURNAL AND THRUST BEARING WIDTH - TM-9-2815-260-24_245

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ARMY TM 9-2815-260-24 AIR FORCE TO 38G1-126-2 MARINE CORPS TM 09244A/09245A-24 5-65 NOTE If engine has previously had a major overhaul and undersized bearing inserts were used, above listed ID and OD dimensions may not be the same as those recorded.  However, oil clearance should be within specifications.   Oil clearance is 0.0016-0.0043 inch (0.041 to 0.109 mm). (e) Use crankshaft journal outer diameter measurements to determine if journal is out-of- round or tapered.  Refer to Table 5-5 for journal out-of roundness wear limit and journal taper-per-inch of journal length wear limit. (f) If journals are tapered, out-of-round, scored, or damaged, crankshaft should be ground.   Refer to paragraph (e).  Proper undersize bearings should be installed after grinding. (3) Measure main thrust journal width and thrust bearing width, refer to Figure 5-69, as follows: (a) Measure width of main thrust journal with an inside micrometer. (b) Refer to Table 5-5 for new main thrust journal width. (c) If width is not within specification, recondition crankshaft and install an oversize thrust washer set.  If width is correct, measure main thrust bearing width. (d) Measure width of thrust bearing using an outside micrometer. FIGURE 5-69.  MEASURING MAIN THRUST JOURNAL AND THRUST BEARING WIDTH (e) Refer to Table 5-5 for new main thrust bearing width. (f) Refer to Table 5-5 for bearing-to-journal clearance.


 


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