TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 44 of 1015
TM 9-2320-272-24-1
1-21. POWER SYSTEM OPERATION
The power system includes components that supply all vehicles covered in this manual the power to
move. Each of these components will be described as part of the following subsystems:
a.
Air Intake System Operation (page l-34).
b.
Fuel System (Dual Tank) Operation (page l-36).
c.
Fuel System (Single Tank) Operation (page l-38).
d.
Exhaust System Operation (page l-39).
e.
Cooling System Operation (page l-40).
f.
Engine Oil System Operation (page l-42).
g.
Powertrain System Operation (page l-44).
a. Air Intake System Operation.
The air intake system channels and cleans air going to the combustion chamber, where it mixes with fuel
from the injectors to provide power for the engine. This system is identical on all models, except where
indicated. Major components of the air intake system are:
1-34
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