TM 9-2350-287-20-11-16. EQUIPMENT OPERATION (continued).APUThe APU is an 11.5-horsepower, overhead valve, two-cylinder, four-cycle, air-cooled diesel engine used to drive anelectrical generator and the hydraulic system pump.The chain-driven generator is used to recharge the batteries and provide electrical power for the operation of M992A1components and a supported howitzer.The hydraulic system pump powers hydraulic system components. Failure of the APU would result in system failure.[Text Deleted]Change 1 1-23
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