4.4.19 CrankshaftAssemblyMaintenance,Model609-A. (Continued)f .Measure crankshaft (7) for the dimensions listed in Table 4-13.Table 4-13.Crankshaft Dimensions, Model 609-A.DimensionMinimumMaximumMain bearing journal2.8704 inches (72.9084 mm)2.8744 inches (73.0098 mm)diameter - allMain bearing journal0.0020 inches (0.0508 mm)out of roundMain bearing journal0.0015 inches (0.0381 mm)taperMain bearing run-out0.0030 inches (0.0762 mm)at centerConnecting rod journal2.3710 inches (60.2234 mm)2.3740 inches (60.2996 mm)diameter - allConnecting rod journal0.0020 inches (0.0508 mm)out of roundConnecting rod journal0.015 inches (0.3810 mm)taperF i l l e t r a d ii0.1400 inches (3.5560 mm)0.1700 inches (4.3180 mm)Crankshaft main0.0009 inches (0.0229 mm)0.0034 inches (0.0864 mm)bearing clearanceSeal surface4.2950 inches (109.0930 mm)4.3150 inches (109.6010 mm)diameter - rearSeal surface diameter -1.8590 inches (47.2186 mm)1.8750 inches (47.6250 mm)f r o ntCenter main bearing2.1240 inches (53.9496 mm)2.1270 inches (54.0258 mm)journal widthMain bearing journals1.3125 inches (33.3375 mm)Connecting rod journals1.4950 inches (37.9730 mm)1.5000 inches (38.1000 mm)g .Inspect crankshaft (7) for cracks invisible to the eye by magnetic particle,fluorescent magnetic particle, or fluorescent penetrant method.Inspect forcircumferential fillet cracks at the critical areas and 45° cracks startingfrom either the critical fillet locations or the crankshaft holes.If thesecracks are present, replace crankshaft (7).h .Replace all damaged or defective components.4.4.19.3 Installation.Ensure timing mark on crankshaft gear faces away from crankshaft.a.Install new woodruff key (11) on crankshaft (7).b.Using arbor press, install new crankshaft gear (10) on crankshaft (7).c .Lightly coat six new upper main bearings (8) and new upper center mainbearing (9) with engine assembly grease and install them in engine block.d.Lightly coat all journals of crankshaft (7) with engine assembly grease.4-68TM 10-4320-344-24
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