TM-9-2350-311-34-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-34-1 1-10 CORROSION PREVENTION AND CONTROL (CPC) CPC of Army materiel is a continuing concern. It is important that any corrosion problems with this item be reported so that the problem can be corrected and improvements can be made to prevent the problem in future items. While corrosion is typically associated with rusting of metals, it can also\ include deterioration of other materials, such as rubber and plastic. Unusual cracking, softening, swelling, or breaking of these materials maybe a corrosion problem. if a corrosion problem is identified, it can be reported using SF 368, Product Quality Deficiency Report. Use of keywords such as “corrosion, “ “rust,” “deterioration,” or “cracking” will ensure that the information is identified as a CPC problem. The form should be submitted to the address specified in DA PAM 738-750. SECTION II. EQUIPMENT DESCRIPTION AND DATA 1-11 CAPABILITIES AND FEATURES NOTE Refer to TM 9-2350-311-10 for further equipment descriptions and data. 1-11.1 Electrical System The howitzers’ electrical power is provided through a 24-Vdc (nominal) generating system consisting of the following components: a. Four 12-Vdc (nominal) batteries connected in series/paralle that provide 24 Vdc (nominal) to the master relay. b. M109A2/M1 09A3 Howitzers have a 3-phase, 100-amp alternator that maintains 24-Vdc (nominal) electrical power through the voltage rectifier, voltage regulator, and to the master relay for systems operation. Ml 09A4/ Ml 09A5 Howitzers have a 3-phase, 180-amp alternator. c. Master relay that delivers electrical power to electrically operated systems/equipment in the howitzers (hull and cab) by turning on the MASTER switch. The MASTER switch, located on the driver’s portable instrument panel, actuates the vehicles’ electrical system. With the powerplant off (engine not running), activation of the MASTER switch provides delivery of electrical power direct through the alternator, voltage rectifier, voltage regulator, and master relay circuit. 1-11.2 Powerplant (Engine and Transmission) The powerplant (engine and transmission) provides the mobility for the howitzers. 1-8