TM 5-3895-373-342.17DIESEL ENGINE REPAIR.C.INSPECT - Continued.d.Use an inside caliper to measure width of idlergear hub (142) Surface D.e.Idler gear hub width must be 1.1915 to 1.1945in. (30,26 to 30,33 mm).f.If idler gear hub width is greater than 1.1945 in.(30,33 mm), replace idler gear hub.3.INSPECT CRANKSHAFT ASSEMBLY MAINJOURNALS AND CONNECTING ROD JOURNALSFOR WEAR AND OVALITY.a.Use an outside micrometer (Item 17,Appendix D) to measure outside diameters ofmain journal Surfaces E on crankshaftassembly (136).b.Outside diameters of main journal Surfaces Emust be 2.9984 to 2.9992 in. (76,16 to 76,18mm), with a maximum wear/ovality allowanceof 0.0015 in. (0,04 mm).c.If main journal surface outer diameters are lessthan 2.9984 in. (76,16 mm) or ovalityexceeds 0.0015 in. (0,04 mm), regrind orreplace crankshaft assembly (136).d.Use an outside micrometer (Item 17,Appendix D) to measure outside diameters ofconnecting rod journal Surfaces F oncrankshaft assembly (136).e.Outside diameters of connecting rod journalSurfaces F must be 2.4988 to 2.4996 in.(63,47 to 63,49 mm), with a maximumwear/ovality allowance of 0.0015 in. (0,04mm).f.If connecting rod journal surface diameters areless than 2.4988 in. (63,49 mm) or oyalityexceeds 0.0015 in. (0,04 mm), regrind orreplace crankshaft assembly (136).GO TO NEXT PAGE2-174
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