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).