TM-9-2320-341-10

TRUCK, TRACTOR, LIGHT EQUIPMENT TRANSPORTER (LET), 8X8 M983A4 LET

TECHNICAL MANUAL; OPERATOR'S MANUAL

OCTOBER 2008

TM-9-2320-341-10 - Page 851 of 962

Table 5.

Radiator Servicing. - Continued

Item

Capacities

Expected

Temperatur

es

Above +15°

F (-9°C)

Expected

Temperatur

es

+40 to -15°F

(+4 to -26°

C )

Expected

Temperatur

es

+40 to -50°F

(+4 to -46°

C )

Interval

Corrosion In-

hibitor

(Note 1)

1.8 qt. (1.7 L)

(Note 1)

(Note 1)

(Notes 1 and

3)

As Required

NOTE

1.

Refer to TB 750-651 (WP 0146) for more information on antifreeze and additives

used in the HEMTT series vehicle engine cooling system, and TM 750-254 (WP

0146) for detailed instructions for draining, cleaning, and flushing cooling systems

of tactical vehicles.

2.

Type 1C (normal) and Type 1B (arctic) antifreeze is premixed, and DOES NOT

REQUIRE the addition of water. Never add water or inhibitor to Type IB anti-

freeze.

3.

Refer to FM 9-207 (WP 0146) for arctic operation.

4.

Engine coolant contaminant level is checked annually. Engine coolant does not

need to be changed until it fails check.

5.

A mixture of 50% Ethylene Glycol (EG) antifreeze to 50% water will provide freeze

protection down to -34°F (-37°C).

6.

A mixture of 50% Propylene Glycol (PG) antifreeze to 50% water will provide

freeze protection down to -27°F (-33°C).

7.

A mixture of 60% Ethylene Glycol (EG) antifreeze to 40% water will provide freeze

protection down to -62°F (-52°C).

8.

A mixture of 60% Propylene Glycol (PG) antifreeze to 40% water will provide

freeze protection down to -56°F (-49°C).

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