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TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download

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TM 9-2350-311-10 1-9 LIST OF ABBREVIATIONS — CONTINUED KMPH L LCD LED LHR LPRS M MAX MIN MM MOPP MPH MT MTOE MTSQ NATO NBC NCO NRC PD Kilometers Per Hour Liter Liquid Crystal Display Light Emitting Diode Low Heat Rejection Loose Projectile Restraint System Meter Maximum Minimum Millimeter Mission-Oriented Protective Posture Miles Per Hour Mechanical Time Modified Table of Allowances and Equipment Mechanical Time Super Quick North Atlantic Treaty Organization Nuclear, Biological, and Chemical Non-Commissioned Officer Nuclear Regulatory Commission Point Detonating PLL Prescribed Load List PMCS Preventive Maintenance Checks and Services PROX Proximity PSI Pounds Per Square Inch RAAM Remote Anti-Armor Mine RAP Rocket Assisted Projectile RDS Rounds RPM Revolutions Per Minute RPO Radiation Protection Officer SF Standard Form SINCGARS Single Channel Ground and Airborne Radio SOP Standing Operating Procedures SP Self-Propelled SQ Super Quick TOE Table of Organization and Equipment V Volts VAC Volts Alternating Current VDC Volts Direct Current VT Variable Time WP White Phosphorous Section Il. EQUIPMENT DESCRIPTION 1–10 EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES The medium, self-propelled howitzer is a full-tracked, armored combat support, internally loaded, air transportable, vehicle powered by an eight cylinder, diesel engine. The vehicle carries a crew of six: howitzer driver, chief of section, two cannoneers, gunner, and assistant gunner. The primary armament on M109A2/M109A3/M109A4 howitzers includes a 155MMM185 cannon assembly and M178 mount, with firing accomplished by an M35 firing mechanism which uses cartridge type primers. The primary armament on M109A5 howitzers includes a 155MMM284 cannon assembly and M182 mount, with firing accomplished by an M49 firing mechanism. The secondary armament is a caliber 50 machine gun. The hull and cab assemblies protect the crew and equipment against small arms fire. The vehicle is divided into three sections: driver’s compartment, engine compartment, and fighting compartment. M109A4/M109A5 howitzers contain nuclear, biological, and chemical (NBC) equipment that allows the crew to operate the howitzer in an NBC environment. 1-5