that the boom hoist brake, which is spring
the interlock lever (11, figure 121) on the
set, cannot be released and will keep the
boom hoist brake assembly. Be sure the
boom from falling when the jaw clutch is
lock nut (21, figure 120) is pulled up tight
disengaged.
to hold the adjusting screw in position.
The control system is now adjusted so
Section XXI. CRANE BOOM, PULLEYS, AND PULLEY BUSHINGS
204. Crane Boom and Pulleys
203. General
The boom for crane consists of two sections. The
power boom section is connected by two footpins to the
a. Removal.
revolving frame. The upper boom section carries the
(1) Remove all reeving from the crane boom.
boom point sheave assembly. The boom is of welded
(2) Remove the crane boom from the
construction.
revolving frame.
Figure 121. Boom hoist brake assembly.
AGO 6819A
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