TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 379 of 775

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

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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.

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