The suspension system supports the carrier and delivers engine power to the road. It allows the carrier to
maneuver and be stable. Suspension system parts are the drive sprockets, tracks, idler wheels, track tension
adjuster, road wheels, and support arms. Also, there are torsion bars and shock absorbers. The M741A2 has
lockout cylinders to stabilize the carrier during operation of the weapon.
The drive sprockets drive the tracks. They are powered by left and right final drives from differential. The
tracks consist of two flexible chains of track shoes. The tracks ride on the drive sprockets and are guided by the
road wheels and idler wheels. The idler wheels can be adjusted to maintain correct track tension.
There are five pairs of road wheels per side. Track centerguides fit between each pair of road wheels. Road
wheels and torsion bars are connected to support inns. The torsion bars act as springs to keep the road wheels
on the ground and from hitting the bottom of the carrier.
The electrical system provides power for the carrier. The system operates on wet cell batteries and includes
charging, regulating, and monitoring equipment. The batteries provide a normal operating 24 volts with an
amperage capability of 100 or 200 amps per hour (depending on the system installed).
The batteries supply the carrier with electricity when the engine is off. All electrical power is delivered through
the distribution box. Electrical power flows from the batteries through the distribution box, cables, and wiring
assemblies to the electrical equipment. The hull is a ground for the electrical system.
The generator recharges the batteries and supplies electricity while the engine is running. The generator has
100 or 200 amps per hour capability (depending on the system installed).
There are several electrical subsystems within the hull. Each subsystem contains at least one wiring
assembly. Major electrical subsystems and assemblies are:
Interior and Exterior Lights. Exterior lights include blackout lights, stop light, and headlights. Interior lights
include domelights and panel lights.