Manitowoc Published 10-01-2012, Control # 045-08 5-23
777 SERVICE MANUAL HOISTS
5
8. Inspect nylon sheaves to verify they have not separated
and “walked off” steel inserts or bearings as shown in
Figure 5-20. Maximum sideways displacement is 1/8 in.
(3 mm). Replace worn or damaged sheave assembly.
9. Make sure sheaves, drums, and rollers are properly
lubricated according to lubrication instructions in
Operator’s Manual.
Many current production sheaves are not equipped with
grease fittings, but are packed with grease at assembly.
Repack the bearings of these sheaves with CraneLUBE
EP #2 grease when the sheaves are overhauled.
Due to application and design variations, it is not
possible to give specific grease repacking intervals or
life expectancy of components.
NOTE: For some sheaves, the seals are an integral part of
the bearing. Therefore, if a seal is damaged during
repacking, the complete bearing may have to be
replaced.
Steel Insert
or Bearing
Nylon
Sheave
Improper
Snap Ring
Engagement
FIGURE 5-20
1/8 in (3 mm)
Maximum Sideways
Displacement
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