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Chapter 6 COOLING SYSTEM MAINTENANCE
Up
TM-9-2320-360-20-2 Truck Tractor M1070 8x8 Heavy Equipment Transporter (HET) NSN
Next
Table 6-1. Guide for Preparation of Ethylene Glycol Antifreeze Solutions
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,
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,
Test Kit, Reserve Alkalinity (Item 51,
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

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