TM 5-3810-207-20/TO 36C23-3-37-12Figure 77. Swing shaft drive chain and tightener, removal and installation .(2) Inspect the chain for breaks, bent links,defective rollers, and other damage.Repair the chain by installing new linksor replace defective chain.(3) Inspect the chain tightener for brokenteeth, worn bushing, and other damage.Replace defective chain, tightener.c.Installation and Adjustment.(1) Install the drive chain and chaintightener as illustrated on figure 77.(2) Adjust the drive chain as instructed onfigure 77.(3) Install the swing gear guard (par. 149).Section VII. MAIN AND BOOM HOIST DRIVE ASSEMBLY151. GeneralThe main and boom hoist drive assembly is located atthe front-left side of the crane-shovel, inside the cab.The main hoist drive sprocket, boom hoist drivesprocket, main drive sprocket, boom hoist shaftsprocket, main hoist drive chain, and boom hoist drivechain are inclosed by the main drum drive guard. Themain hoist drive sprocket and the main drum drive113
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