TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0076 00 0076 00-2 COOLING SYSTEM SERVICING (Contd) DRAINING WARNING Do not remove radiator cap if engine is hot. Steam or hot coolant under pressure may cause injury to personnel. 1. Turn radiator cap (1) to first stop. Allow any pressure to escape. 2. Remove radiator cap (1) by pressing down and turning counterclockwise. Lift off radiator cap (1) from filler neck (2). WARNING Accidental or intentional introduction of liquid contaminants into the environment is a violation of state, federal, and military regulations. Refer to Army POL (WP 0001 00) for information concerning storage, use, and disposal of these liquids. Failure to do so may result in damage to environment and health of personnel. NOTE Use a drain pan to capture any draining coolant. Dispose of fluids in accordance with local policy and ordinances. Ensure all spills are cleaned up. 3. Open engine block draincock (5) and radiator draincock (4) to allow coolant to drain. 4. Close engine block draincock (5) and radiator draincock (4). CLEANING AND FLUSHING Follow cleaning and flushing instructions included in cleaning compound kit to clean and flush radiator (3) and cooling system. FILLING CAUTION • Type 1, ethylene glycol (green) and Type 2, propylene glycol (purple), should never be mixed due to their difference in toxic properties. Failure to comply may result in damage to equipment. • Using antifreeze without mixing it with water can cause high operating temperatures, blockage of cooling system passages, and damage to water pump seals. NOTE • Type 1 antifreeze is an ethylene glycol based coolant, green in color, and is the only authorized antifreeze for military vehicles. Type 1 can be added to factory-filled pink coolant. When it becomes necessary to flush factory coolant, Type 1, ethylene glycol, will be used. When mixing Type 1 antifreeze with water, distilled water is recommended. Tap water should only be used in emergency situations. • Capacity of cooling system is 32 quarts (30.3 liters). 1. Fill cooling system with required amount of antifreeze (table 3-1). 2. Add distilled water to 1 in. (2.45 cm) below top of filler neck (2). 3. Install radiator cap (1) on filler neck (2). 4. Start engine (TM 9-2320-361-10), and allow engine to reach normal operating temperature. 5. Stop engine (TM 9-2320-361-10) and allow engine to cool.