AIR INLET AND EXHAUST SYSTEM
4. Compressor wheel. 5. Bearing. 6. Oil Inlet. 7.
Bearing. 8. Turbine housing. 9. Turbine wheel. 10. Air
There are two turbochargers, on the rear of the
in-let. 11. Oil outlet.
engine. The turbine side of the turbochargers is fastened
Clean air from the air cleaners is pulled through
turbocharger is connected to the aftercooler.
the compressor housing air inlet (10) by rotation of
compressor wheel (4). The action of the compressor
wheel blades causes a compression of the inlet air. This
compression gives the engine more power because it
makes it possible for the engine to burn additional fuel
with greater efficiency.
Maximum rpm of the turbocharger is controlled
by the fuel setting, the high idle rpm setting and the
height above sea level at which the engine is operated.
If the high idle rpm or the fuel setting is higher than
given in the Fuel Setting And Related Information
Fiche (for the height above sea level at which the
1. Turbocharger. 2. Oil drain line. 3. Oil supply line.
engine is operated), there can be damage to engine
or turbocharger parts. Damage will result when
The exhaust gases go into turbine housing (8)
increased heat and/or friction due to the higher
and push the blades of turbine wheel (9). This causes
engine output goes beyond the engine cooling and
the turbine wheel and compressor wheel to turn at up to
lubrication systems abilities. A mechanic that has
the proper training is the only one to make the
adjustment of fuel setting and high idle rpm setting.
The bearings (5 and 7) in the turbocharger use
engine oil under pressure for lubrication. The oil comes
in through oil inlet port (6) and goes through passages in
the center section for lubrication of the bearings. Then
the oil goes out oil outlet port (11) and back to the oil pan.
VALVE SYSTEM COMPONENTS
The valve system components control the flow of
inlet air and exhaust gases into and out of the cylinders
during engine operation.
The crankshaft gear drives the camshaft gears
through idlers. Both camshafts must be timed to the
crankshaft to get the correct relation between piston and