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 53 of 481
TM 9-2320-272-10
1-36
1-18. POWER SYSTEM OPERATION
The power system includes those components’ that give 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 1-36).
b.
Fuel System (Dual Tank) Operation (page 1-38).
c.
Fuel System (Single Tank) Operation (page 1-40).
d.
Exhaust System Operation (page 1-41).
e.
Cooling System Operation (page 1-42).
f.
Engine Oil System Operation (page 1-44).
g.
Powertrain System Operation (page 1-46).
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:
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