PLATE AS 4596448 - Caterpillar

Illustration 1 g00682222
Turbocharger (Typical example)
(1) Compressor wheel
(2) Bearing
(3) Oil inlet
(4) Bearing
(5) Turbine wheel
(6) Air inlet
(7) Exhaust inlet adapters
(8) Oil outlet The exhaust gases go into the turbocharger through the exhaust inlet adapters (7). The exhaust gases then push the blades of the turbine wheel (5). This push causes the turbine wheel and the compressor wheel to turn.Clean air from the air cleaners is pulled through the compressor housing air inlet (6) by the rotation of the compressor wheel (1). The action of the compressor wheel blades causes a compression of the inlet air. This compression gives the engine more power because the engine may now burn additional fuel with greater efficiency.The following factors determine the speed (rpm) of the turbocharger:
the fuel setting
the high idle rpm setting
height of the engine above sea level
Do not set the fuel setting or the high idle rpm above the level specified in the Fuel Setting Information. Damage to the engine or the turbocharger may result.
The bearings (2) and (4) in the turbocharger use engine oil under pressure for lubrication. The oil comes in through the oil inlet port (3) and the oil goes through the passages in the center section for lubrication of the bearings. The oil goes out of the oil outlet port (8) and the oil returns to the oil pan.