c.Slowly remove sheave (14) from crown block, pay particular attention to spacers (13), as they may fall out.d.Place sheave (14) on a workbench and press out bearing (15).e.With the sheave (14) lying flat, place a spacer (13) in the bore of sheave so that it is flush with the bottom side.f.Install a new bearing (15) in sheave (14) and use the other spacer (13) against the bearing to push it firmly inplace.g.Place sheave (14) in position in crown block frame and install shaft (12).h.Install lockplate (11) in shaft slot and install screws (9) and lockwashers (10). Install grease fitting (8).4-13.2 ChainFeedSprocketAssembly. (Figure 4-34)4-13.2.1 Disassembly.a.Remove grease fitting (1), screws (2), lockwashers (3) and lockplate (4).CAUTIONWhen the shaft (5) is removed, the sprocket (6) is free to fall. Take precautions to preventinjury.b.Use a pry bar in the lockplate slot of shaft (5) to begin removal. Remove shaft (5).c.With shaft (5) removed, slowly remove sprocket (6), pay particular attention to spacers (7), as they may fall out.d.Remove spacers (7), seals (8) and bearing (9). Discard seals.e.The hanger (10) should not be removed unless it must be replaced because of damage. If replacement isrequired, perform following step.f.Support hanger (10) so it does not fall, and remove locknut (11), washer (12), spring (13), stop (14) and hanger(10). Discard nut (11).4-13.2.2 Assembly.a.If hanger was removed, install hanger (10), stop (14), spring (13), washer (12) and a new locknut (11). Do nottighten the nut to compress spring (13).b.Press new bearing (9) into sprocket (6) and install new seals (8).c.Assemble spacers (7) with sprocket (6) and position in hanger (10). Install shaft (5).d.Install lockplate (4) in slot of shaft (5) and install screws (2) and lockwashers (3). Install grease fitting (1).4-148
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