TM5-6115-593-34NAVFAC P-8-631-34TO-35C2-3-463-2a.Removal.(1) Refer to paragraph 13-33 for cylinder linerreplacement and inspection instructions.(2) Remove 14 side bolts (33, figure 13-50) andwashers (34) from each side of block (39)securing main bearing caps (38) to side ofblock.(3) Remove main bearing capscrews (35 and36) and remove and discard lockplates (37).(4) With a small prybar, loosen each mainbearing cap (38). When caps are free, liftcaps from block.(5) Remove lower thrust washers (19, figure 13-51) from each side of rear main bearing.(6) Remove lower bearing shells (11, 13, 15,and 17) from crankshaft or cap and removeupper thrust washers (19). Tag and tapethrust ring halves together to preventdamage.(7) Using a chain hoist with rubber-coveredhooks to protect bearing surfaces, liftcrankshaft from cylinder block. Removeupper bearing shells (12, 14, 16, and 18).WARNINGOVERHEAD OPERATIONS HAVEINHERENT HAZARDS THAT CANNOT BEMECHANICALLY SAFEGUARDED. HARDHATS AND SAFETY SHOES AREREQUIRED.NOTEReplace bearing caps in same positionas removed. Main bearing caps are notinterchangeable. Tape correspondingupper and lower bearing shells togetherand number by position removed.(8) Using a camshaft bushing drive remove thecamshaft bushings (23, figure 13-50).b.Inspection.(1) Cylinder Liners. Refer to paragraph 13-33for cylinder liner inspection procedure.(2) Main Bearings. Gauge shell with a ball-point micrometer, dial indicator thicknessgauge, or comparator. Discard shells thatare worn more than 0.001 inch (0.03 mm) orif chipped, flaked, or scored. Refer totabulated data in Chapter 1.(3) Crankshaft. Proceed as follows:(a) If crankshaft gear is chipped, cracked,broken, or worn, replace gear.NOTEIf crankshaft gear condition issatisfactory, do not remove gear.(b) Attach a circular-type puller behind thecrankshaft gear.(c) Apply 75 to 100 foot- pounds (102 to136 joules) on puller screw.LEGEND FOR FIGURE 13-501.Liner14.Shaft27.Plug2.O-ring15.Screw28.Screw3.Seal16.Screw29.Lockwasher4.O-ring17.Plug30.Washer5.Drain cock18.Plug31.Nozzle6.Coupling19.Bypass spring32.Plug7.Tube20.Disc33.Bolt8.Elbow21.Drain cock34.Washer9.Valve22.housing35.Capscrew10.Elbow23.Bushing36.Capscrew11.Tee24.Plug37.Lockplate12.Nipple25.Dowel38.Cap13.Bushing26.Dowel39.Block13-95
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