TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 416 of 775

TM 9-2350-311-10

3-5 HULL MAINTENANCE PROCEDURES — CONTINUED

3-5.1

Engine Cooling System — Continued

d. Coolant Temperature Ranges

Below -55° F(-48°C) . . . . . . . . . . . . . . . . . . . . .

-55 to 32° F(-48° to 0°C) . . . . . . . . . . . . . . . . . . .

Above 32° F(0°C) . . . . . . . . . . . . . . . . . . . . . . . . .

Antifreeze,

(Arctic type, full strength)

(item 3, Appx D)

Antifreeze,

(50% water mixture)

(item 4 or 5, Appx D)

Add corrosion inhibitor, see TB 750-651

(22–1/2 ounces (665.4 ml) per vehicle)

3-5.2

Fuel System

a. Service

Diesel fuel is flammable. Do not smoke within 50 feet (15.2 m) of the vehicle while performing

service operations to prevent serious injury to personnel.

1

Using a container to catch fuel, open drain cock (1) on primary fuel filter (2) and drain cock (3) on

secondary fuel filter (4) to remove water and dirt.

2

When clear fuel is visible, close drain cocks (1 and 3).

3

After primary and secondary fuel filters (2 and 4) have been drained, purge air from fuel system by

turning FUEL PRIME control switch to ON for 45 seconds prior to starting engine.

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