COOLING SYSTEM SERVICE

TM 9-2320-360-20-2

6-2. COOLING SYSTEM SERVICE

This task covers

a. Coolant Testing

e. Coolant Filter Replacement

b. Draining

f. Filling

c. Inspection

g. Follow-On Maintenance

d. Flushing

Initial Setup:

Equipment Conditions

Materials/Parts

Engine hood opened (TM 9-2320-360-10).

Antifreeze (Item 10, Appendix C)

Inner fenders removed (para 16-34).

Antifreeze Extender Additive (Item 9,

Appendix C)

Filter, Coolant (Item 28, Appendix G)

Filter, Coolant (Item 28.1, Appendix G)

Tools and Special Tools

Tool Kit, Genl Mech (Item 54, Appendix F)

Tester, Antifreeze and Battery (Item 49,

Appendix F)

Test Kit, Reserve Alkalinity (Item 51,

Appendix F)

a. Coolant Testing

WARNING

Coolant may be very hot and under

pressure from engine operation.

Ensure engine is cool before

performing maintenance. Failure to

comply may cause serious injury.

(1) Test

for

antifreeze

protection

using

antifreeze/battery tester (1).

Using black

dipstick (2), place a few drops of coolant on

exposed portion of measuring window. Point

tester toward bright light source.

(2) Observe permanent antifreeze protection level

shown on scale.

CAUTION

Do not dilute Arctic-type antifreeze with water or inhibitor.

Use it as issued.

Dilution may result in damage to cooling system.

NOTE

Freeze protection indication beyond the limits shown in table 6-1 or below -55 F

(-48 C) when ethylene glycol antifreeze is used will require partial coolant drain

and replace with water. See LO 9-2320-360-12. Freeze protection must not exceed

-55F (-48 C).

(3)

Adjust freeze protection if required according to scale reading and table 6-1.

6-2 Change 1