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 375 of 481

c. Coolant Surge Tank.

WARNING

Extreme care should be taken when removing surge tank filler

cap if temperature gauge reads above 175°F (79°C). Steam or hot

coolant under pressure may cause injury.

(1)

Remove coolant surge tank filler cap (1). Visually check coolant level.

Surge tank (2) should be filled to approximately bottom end of filler tube (3) with

engine cold, and slightly above with engine at normal operating temperature.

NOTE

• Have suitable container ready to catch liquid contaminants.

• If surge tank on M939A2 series vehicles is found to be empty,

open drainvalve on aftercooler and fill surge tank. Close drain-

valve when coolant is observed flowing from drain, and continue

filling to approximately bottom end of fill tube.

(2)

If coolant level is low, add coolant as necessary.

(3)

Run engine until temperature gauge (4) reads 175°-200°F (79°-93°C).

Check and refill as necessary.

d. Power Steering Reservoir.

CAUTION

Do not overfill power steering reservoir. Oil will overflow into vent

system.

TM 9-2320-272-10

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3-8. ENGINE SERVICE (Contd)