TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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2–20 OPERATION IN UNUSUAL 2-20.4 Operation in Extreme Cold TM 9-2350-311-10 ENVIRONMENT/WEATHER — CONTINUED NOTE See FM 9-207 for description and operation of primary armament in extreme cold. a. Winterization Kit 1 2 3 4 5 6 The winterization kit is installed by direct support maintenance. It is used in extreme cold temperatures between 0 to -65° F (–18 to -54° C) to prevent the coolant from freezing after vehicle has been shut down. Both coolant level and fuel supply must be full. NOTE Coolant heater will operate with MASTER switch to either ON or OFF. Depress press-to-test light (1) on heater control box (2) to check for electrical current. Be sure engine coolant is at normal operating temperature. It may be necessary to start engine and bring coolant temperature up. NOTE Exhaust outlet plug is located on hull by engine exhaust. Remove heater exhaust outlet plug (3). Secure tarpaulins over air intake and exhaust grilles. Tarpaulins will help keep out the cold and retain heat from the winterization kit. 2-273