2-25. AIR INTAKE.
AlR RESTRICTION INDICATOR. Mounted on instrument panel. A red signal shows on
indicator housing when air cleaner needs servicing. A tube connects the indicator to the air
cleaner outlet. When air flow through the cleaner is restricted, the red signal becomes visible.
The unit is factory set to signal at a specific filter restriction. Resetting is accomplished by
pushing a button which is recessed in the bottom.
CROSSOVER TUBE. Directs compressed air from turbocharger, through aftercooler, to
AFTER COOLER. Cools air entering intake manifold from turbocharger. Water flow from
engine cooling system absorbs heat. (See illustration of cooling system in paragraph 2-32.)
ENGINE INTAKE MANIFOLD. Directs compressed air charge to each cylinder after it has
been cooled by aftercooler.
PLENUM. Directs outside air to the air intake tube.
AIR INTAKE TUBE. Draws outside air through grille mounted plenum and into air cleaner.
lNLET TUBE. Directs air from air cleaner to turbocharger.
TURBOCHARGER. Driven by exhaust gases (para 2-30). Compresses air in the intake mani-
fold to increase engine power.
AIR CLEANER. Mounted on fire wall. Removes impurities from air entering turbocharger.
Has replaceable dry, two-stage element.