TM 10-3950-206-12
Figure 4-60. Hook block and cable, removal points.
Figure 4-61. Boom sheave, removal.
of the boom, and must be referred to Direct Support
(2) Lubricate in accordance with current
Maintenance.
lubrication chart.
b. Adjustment.
4-79. Boom Sheave
Note. Both side wear plates should be
a. Removal. Refer to figure 4-61, and remove
adjusted in the same manner, to maintain the boom
the boom sheave as instructed.
in a "centered" position.
b. Inspection and repair.
(1) Remove four capscrews and lockwashers
(1) Inspect sheave groove for excessive wear.
(2) Replace a sheave that shows wear on the
(2) Remove wear plate and holder assembly
groove bottom.
and shims.
c. Installation. Install in the reverse of removal.
(3) Install shims, equally on both sides, to
4-80. Boom Adjustment
provide a total of 0.125 to 0.250 inch clearance between
a. General.
Organizational maintenance is
wear plates and boom.
limited to adjusting the side wear plates on the boom.
Adjustment of other wear plates, requires the removal
4-61
