TM 5-3810-207-20/TO 36C23-3-37-12
sprocket are connected by the main hoist drive chain
which is a double-strand, roller-type chain. The boom
hoist drive sprocket and boom shaft drive sprocket are
connected by a single-strand, roller-type drive chain.
152. Main Drum Drive Chain Guard
Removal. Remove the main drum drive
chain guard as instructed on figure 78.
Figure 78. Main drum drive chain guard, removal and installation.