TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 397 of 1207
TM 9-2320-361-20
3-41. COOLING SYSTEM SERVICING
This task covers:
a. Draining System
c. Filling System
b. Cleaning and Flushing System
INITIAL SETUP:
APPLICABLE MODELS
All
MATERIALS/PARTS
Antifreeze (Appendix C, Item 6)
Cleaning compound kit (Appendix C, Item 10)
REFERENCES (TM)
TM 9-2320-361-10
TM 9-2320-361-20P
EQUIPMENT CONDITION
Parking brake set (TM 9-2320-361-10).
Hood raised and secured (TM 9-2320-361-10).
Battery ground cable disconnected (para. 4-48).
GENERAL SAFETY INSTRUCTIONS
Do not remove radiator cap if engine is hot.
a. Draining System
WARNIN G
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 continue turning counterclockwise. Lift off radiator
cap (1) from filler neck (2).
NOTE
Have drainage containers ready to catch coolant.
3. Open engine block draincock (5) and radiator draincock (4).
4. Close engine block draincock (5) and radiator draincock (4).
b. Cleaning and Flushing System
Following cleaning and flushing instructions included in cleaning compound kit, and clean and flush
radiator (3) and cooling system.
c. Filling System
NOTE
Capacity of cooling system is 32 quarts (30.3 liters).
1. Fill cooling system with required amount of antifreeze (Table 3-1).
2. Add water to 1 in. (2.45 cm) below top of filler neck (2).
3. Install radiator cap (1) on filler neck (2), start engine (TM 9-2320-361-10), and allow engine to reach
normal operating temperature.
4. Stop engine (TM 9-2320-361-10) and allow engine to cool.
WARNIN G
Do not remove radiator cap if engine is hot. Steam or hot coolant
under pressure may cause injury to personnel.
5. Remove radiator cap (1) from filler neck (2) and check level of coolant in radiator (3). Add water if necessary.
3-94
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