TM 10-4320-307-244-17CRANKSHAFT ASSEMBLY REPLACE,REPAIR (CONT)5.Install hexagon screws (1) and washers (2) ineach bearing cap (3).6.Coat upper and lower main bearing shells (4and 5) with lubricating oil.NOTEThe upper main bearing shells have agroove and an oil hole to providecrankshaft lubrication. The lower mainbearing shells do not. The groove for theNo. 7 shell is not in the center of the shell.The wider part of the No. 7 shell must beinstalled toward the flywheel end of thecylinder block.7.Install upper main bearing shells (4) into bearingbrackets of crankcase, In accordance withmarkings made during removal. If new shells areused, be sure that correct part number shells areused at each location.8.Install lower main bearing shells (5) into bearingcaps (3), in accordance with markings made dur-ing removal.CAUTIONGrooves in thrust rings must be toward the crankshaft.9.Coat thrust rings (6 and 7) with clean lubriplate 105, or equivalent, and install upper thrust rings (6) in No. 7 mainbearing saddle in crankcase. Refer to location markings on rings made during disassembly.10. Install lower thrust rings (7) in No. 7 main bearing cap as shown, in accordance with markings made on rings duringremoval. Be sure that locating dowels (8) in bearing cap fit into dowel holes in rings.11. Lubricate threads of hexagon screws (1) and washers (2) with lubricating oil and drain excess oil before installing.4-133
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