SUBSECTION 8A
BOOM HOIST SYSTEM
GENERAL
DESCRIPTION
This section describes the components required to trans-
The boom hoist system is powered by the engine through
mit boom hoist torque from the worm shaft to the boom
the worm shaft. The boom hoist shaft and clutch turn con-
hoist drum.
tinuously while the engine is running and the torque con-
verter clutch is engaged. However, the operator must
The boom hoist system consists of the worm shaft, boom
engage the boom hoist control lever to rotate the boom hoist
hoist shaft, drum brakes, drum clutches and planetary
drum (see Figure 8A-2).
pawls as illustrated in Figure 8A-1.
Figure 8A-1. Boom Hoist System