TM-9-2350-277-40&P Sustainment Maintenance Manual M113A3 M577A3 M1064A3 M1068A3 M58 Download
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BILGE PUMPS Two electrically driven bilge pumps remove water and other liquids from the hull. Water enters the pumps through a screened inlet. The pumps force water out of the carrier through outlet tubes. The bilge pumps are controlled by a switch on the driver's instrument panel. HYDRAULIC SYSTEM The ramp is raised or lowered by a hydraulic system which consists of a pump, a cylinder, a control valve, and a hydraulic tank. This system is controlled by a three position valve located near the driver. Moving the valve to either RAISE or LOWER position directs fluid to and from the ramp cylinder. FIRE EXTINGUISHER SYSTEM It consists of one Carbon Dioxide (CO2) cylinder. CO2 can put out fires quickly and effectively. The fixed fire extinguisher is operated manually by pulling on a âTâ handle located on the hull or by turning a handle on the fire extinguisher. The fire extinguisher located in the driver's compartment is manually discharged into the engine compartment. Another portable fire extinguisher is located in the personnel department. SUSPENSION SYSTEM 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 adjuster, road wheels, and road wheel support arms. Also, there are torsion bars and shock absorbers. The drive sprockets drive the tracks. They are powered by left and right final drives from the transmission. The tracks consist of two flexible chains of track shoes. The tracks ride on the drive sprockets and are guided by 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. All road wheels are connected to support arms. ELECTRICAL SYSTEM 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 200 amps per hour. The batteries supply the carrier with electricity when the engine is off. All electrical power is delivered through the distribution box except for the engine coolant heater and personnel heater which are directly powered from the batteries. Electrical power flows from the batteries through the distribution box, cables, and wiring assemblies to the hull. 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 200 amps per hour capability. There are several electrical subsystems within the hull. Each subsystem contains at least one wiring assembly. Major electrical subsystems and assemblies include the interior and exterior lights, fuel supply, starting and charging systems, ventilation, heating, and bilge pumps. WINTERIZATION EQUIPMENT Personnel heaters are standard equipment on M577A3, M1068A3, and M58 carriers, but are kit items on M113A3 and M1064A3 carriers. Since maintenance of heater components is the same for both standard heaters and kit heaters, they are only covered in one place in this manual. See Table of Contents for maintenance of heater components. END OF WORK PACKAGE TM 9-2350-277-40&P 0003 0003â3/4 blank