TM-9-2320-272-10

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

TECHNICAL MANUAL; OPERATOR'S MANUAL

SEPTEMBER 2004

CHANGE 2

TM-9-2320-272-10 - Page 315 of 481

TM 9-2320-272-10

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(4)

On M939/A1 series vehicles, check fluid level in alcohol evaporator (1)

located on left side of engine. Add alcohol as required.

(5)

Start engine coolant heater if required. Refer to paragraph 2-45 for

engine coolant heater operating instructions.

(6)

Perform after-operation services in Preventive Maintenance Checks and

Services (PMCS table 2-3).

(7)

Drain off any accumulated water in fuel filter/water separator (2). To

drain water from fuel system:

2-32. OPERATING IN EXTREME COLD (Contd)

(a)

On M939/A1 series vehicles, open fuel drainvalves (3) and (4) on fuel

filter/water separator (2) and drain water into suitable container. Close drainvalves

(3) and (4) when clear fuel is visible.

CAUTION

Do not overtighten plastic valve; damage may result and fuel may

leak.

(b)

On M939A2 series vehicles, loosen drainvalve (6) on bottom of fuel

filter/water separator (5) and drain water into suitable container. Close drainvalve

(6) when clean fuel is visible.

(c)

If fuel is not clear before approximately one qt (0.946 L) has drained,

notify unit maintenance.

(d)

After draining has been completed, prime the fuel system (para. 3-8).