Figure 4-33. Crown Block Assembly
CAUTION
When the shaft (4) is removed, the sheave (5) is free to fall. Take precautions to prevent
injury.
b.
Use a pry bar in the lockplate slot of shaft (5) to being removal. Remove shaft (5) and sheave (6) from crown
block.
c.
Place sheave (6) on workbench and press out bearings (7).
d.
Install new bearings (7) so that they are flush on each side of sheave (6).
e.
Place sheave (6) in position on crown block frame and install shaft (5).
f.
Install lockplate (4) in shaft slot and install screws (2) and lockwashers (3). Install grease fitting (1).
4-13.1.2 Third Drum Sheaves.
a.
Remove grease fitting (8), screws (9), lockwashers (10) and lockplate (11).
CAUTION
When the shaft (12) is removed, the sheave (4) is free to fall. Take precautions to prevent
injury.
b.
Use a pry bar in the lockplate slot of shaft (12) to begin removal. Remove shaft (12).
4-147
