TM 9-2320-272-24-1
1-21. POWER SYSTEM OPERATION (Contd)
Key Item and Function
1 RAIN CAP - Prevents rain and large objects from entering air intake system.
2 AIR INTAKE EXTENSION TUBE - Routes air to air intake system. Can be removed for shipping.
3 STACK-TO-AIR INTAKE EXTENSION TUBE - Routes air to air cleaner and is high enough to
keep intake opening above fording level.
4 STACK-TO-AIR CLEANER ELBOW - Flexible connection between air stack and air cleaner.
5 AIR CLEANER - Filters dirt and dust from air.
6 HUMP HOSE - Flexible connection between air cleaner and air cleaner outlet tube.
7 AIR CLEANER OUTLET TUBE - Routes air from air cleaner to intake manifold.
series only).
9 AIR CLEANER INDICATOR - Shows red when engine air filter needs servicing.
and pressurize air entering aftercooler (M939A2 series only).
cooling air intake out of turbocharger (M939A2 series only).
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