SERVICE MANUALCRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASESection 6Figure 8. - Mac Tool No MC-22 (Muffler Chisel)Remove the Crankshaft Bearings as follows:1.Drain the oil from the crankcase oil pan, thenremove the oil pan.2.Remove the cap screws securing the crankshaftbearing caps.Tap the caps lightly with a soft metal hammer ormallet to loosen them, then remove lower bearings.a.If the bearings are to be reused, identifyeach bearing as to its original position.b.Remove the Lower Bearing from the caps.c.Wrap the pieces in a clean cloth and storethem until reassembly.NOTE: If the crankshaft is to be removed, disregardstep 3.3.Remove the upper bearing halves as de-scribedin methods a or b.a.Insert a thin piece of flexible soft metalbetween the crankshaft and crankcase.This will push against the end of thebearing furthest from the nib holding thebearing in the crankcase support.Simultaneously, turn the crankshaft in thedirection of rotation. This will cause thebearing to slide easily from position.b.An alternate method of removing upperbearing halves is to hammer the closed endof a small cotter pin to form a “T”.Insert the prongs of the cotter pin into the oilhole of the crankshaft journal with theflattened head just protruding. Rotate thecrankshaft and the cotter pin head will pushthe bearing from position.Remove the Crankshaft as follows:1.After flywheel is removed, remove the flywheelhousing (with crankshaft rear oil seal retainerattached) from the crankcase.NOTE: It is not necessary to remove the flywheelhousing if all that is required is to replace thecrankshaft rear oil seal.2.Remove the oil lubricating pump asdescribed in Section 8.3.Remove the crankcase front coverassembly as described in Section 7.CGES-185-3PRINTED IN UNITED STATES OF AMERICAPage 7
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