TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 516 of 1015

3-53. COOLING

TM 9-2320-272-24-1

Table 3-1. Guide for Preparation of Antifreeze Solutions.

ETHYLENE-GLYCOL -60°F (-51 °C) INHIBITED ML-A-46153

LOWEST EXPECTED

QUARTS OF

ARCTIC GRADE ANTIFREEZE

AMBIENT

ANTIFREEZE

TEMPERATURE

REQUIRED

-90°F (-68°C)

ML-A-11755

F

C

Freezing point of -90°F

+20

-7

9

(-68°C). Issued ready for

+10

-12

11-3/4

use and must not be mixed

with any other liquid.

0

-18

16

-10

-23

19

-20

-29

20-1/2

-30

-34

23-1/2

-40

-40

25

-50

-46

22-6-1/2

-55

-48

28

Below -60

Below -51

Use arctic grade antifreeze

(-90°F)(-68°C)

CAUTION

When filling cooling system on M939A2 series vehicles, ensure

drainvalve on aftercooler is open. Failure to do so may result in

damage to equipment.

NOTE

The cooling system for the vehicles covered in this manual has a

47 qt (44.51) capacity.

1.

Fill cooling system with required amount of antifreeze and add water to full mark. Close

aftercooler (6) drainvalve (5) when coolant starts running out of drainvalve (5) for on M939A2 series

vehicles.

2.

Install filler cap (1) on surge tank (2).

3.

Start engine (TM 9-2320-272-10) and run at fast idle (800-1,000 rpm) until engine temperature

reaches 185°F (85°C). At this temperature, thermostats should fully open.

4.

Check antifreeze protection level using antifreeze tester. Follow surge tank filler cap (1) removal

procedure of task a.

3-152