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 54 of 481
TM 9-2320-272-10
1-37
1-18. POWER SYSTEM OPERATION (Contd)
RAIN CAP
– Prevents rain and large objects from entering air intake system.
AIR INTAKE EXTENSION TUBE
– Routes air to air intake system. Can be
removed for shipping.
STACK-TO-AIR INTAKE EXTENSION TUBE
– Routes air to air cleaner
and is high enough to keep intake opening above fording level.
STACK-TO-AIR CLEANER ELBOW
– Flexible connection between air
stack and air cleaner.
AIR CLEANER
– Filters dirt and dust from air.
HUMP HOSE
– Flexible connection between air cleaner and air cleaner
outlet tube.
AIR CLEANER OUTLET TUBE
– Routes air from air cleaner to intake
manifold.
INTAKE MANIFOLD
– Distributes air to combustion chambers in each
cylinder head (M939/A1 series only).
AIR CLEANER INDICATOR
– Shows red when engine air filter needs
servicing.
TURBOCHARGER
– Mounts on exhaust manifold and uses spent exhaust
gases to dive impeller and pressurize air entering aftercooler (M939A2 series
only).
AFTERCOOLER
– Distributes compressed air from turbocharger to
combustion chambers while cooling air intake out of the turbocharger
(M939A2 series only).
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