TM 9-2350-247-20-1THEORY OF OPERATION — Continued 0003 00SUSPENSION SYSTEM AND COMPONENTSThe suspension system supports the carrier and delivers engine power to the road. It allows the carrier to maneuver and bestable. Suspension system components are the drive sprockets, tracks, idler wheels, track tension adjuster, road wheels, roadwheel arms, torsion bars, and shock absorbers.The drive sprockets drive the tracks. The M548A1 drive sprockets are powered by left and right final drives from thedifferential. The M548A3 drive sprockets are powered by left and right final drives from the transmission. The tracks consistof two flexible chains of track shoes. The tracks ride on the drive sprockets and are guided by the road wheels and idlerwheels. The idler wheels can be adjusted to maintain correct track tension.The tracks consist of track pads bolted to track shoes that are linked together by pins to form a continuous track. The tracks,each driven by a track drive sprocket secured to the final drive, provide the surface on which the road wheels roll. Trackguides keep the track centered under the road wheels. A track tension adjuster at each track idler wheel is used to adjust tracktension. The track tension adjuster cylinders are filled with grease. Rubber bumpers cushion the road wheel arms when thesuspension bottoms out in rough terrain.There are five pairs of road wheels per side. Track center guides fit between each pair of road wheels. Road wheels mount onarms that are individually splined to the torsion bars. The torsion bars extend the width of the hull, are secured by torsion baranchors bolted to the hull, and act as springs to keep the road wheels on the ground and from hitting the bottom of the carrier.0003 00-13
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