ENGINE 100 Fig. 12 Fig. 11 INSTALLATION OF CRANKSHAFT 1 Install new crankshaft gear together with new key using drift, 2574 5890 35 03. Thoroughly clean crankcase and crankshaft using kerosene. Use suitable wire brushes for cleaning oil passages in crankcase and crankshaft. Blowdrywith moist free compressed air. 2 Install 5thmain bearing oil seal in crankcase and 5th main bearing cap with special tool, 2574 5890 02 03 Fig. 11&12. Ensure that seal holdingpin is inposition. 3 Install bearing shells in crankcase and main bearing caps. Make sure that locating lugs of bearing shells are properly seated in slots of crankcase and main bearingcap. Incaseoldbearingsarebeingused, install marked shells in their respective positions. 4 Bearing shells with oil groove and holes should be fitted incrankcaseand thosewithout holeandgroove should be fitted in main bearing caps. Ensure that holes of bearing shellsmatchwithdrilledholes in the block. 5 Apply clean engine oil to bearing surfaces and crankshaft journals 6 Install upper half of thrustwashers as per size selected to suit ground width of crankshaft 2ndmain journal and then lower crankshaft oncrankcase carefully after installing all bearing shells in crankcase. NOTE : Insert one of the thrust washers without lug (where provided on the block) into the groove providedonthe2ndmainbearingshoulder,androtate the same. Push the crankshaft against this thrust washer so that there is no clearance between crankshaft thrust collar and thiswasher.Insert second thrust washer (of the block) and rotate the same. Matchparting surfaces of thewasher with that of the block. 7 Install other half of thrust washers on 2nd main bearing cap and install cap. NOTE : Place tongued thrust washers on 2nd main bearing cap and install cap on crankcase taking care that locating lugs for bearing shells are on the same side. Screw in cap mounting bolts. Apply oil to thrust faces. Slots on thrust faces of washers should face crankshaft thrust collars. Flat side of washers should face crankcase/main bearing cap. 8 Install other main bearing caps with shells taking care that locating lugs of bearing shells are on same side and caps are fitted in their respective positions i.e. No. 1 cap fitted to the No. 1 main bearing and so on. Screw in main bearing cap mounting bolts.
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