Table 6-1. Guide for Preparation of Antifreeze Solution.

TM 9-2320-211-20-3-1

Ethylene-glycol (-60F)

inhibited (O-A-548, type 1)

Lowest expected

Arctic grade anti-

Pints per gallon

ambient

freeze (-90F)

of coolant capacity

Specific gravity

temperature

(F)

MIL-C-1175

(68F)

(Notes 1, 2)

1.022

Freezing point of -90F

+20

0.750

1.036

Issued ready for use and

+10

1.000

1.047

must not be mixed with

1.375

1.055

any other liquid

-10

1.625

1.062

-20

1.750

1.067

-30

2.000

1.073

-40

2.125

-50

2.250

-60

2.375

Use arctic

Below -60

grade antifreeze

(-90F)

NOTES:

1. Includes heaters.

2. Proportions are in terms of ethylene-glycol per gallon and not pints of ethylene-

glycol added to each gallon of water. For example, at -30F a gallon of coolant

contains two pints of ethylene-glycol and six pints of water (2 pints + 6 pints =

8 pints = 1 gallon).

6-82