o Seals.
o Turbine housing.
o Compressor housing.
The impeller housing bolts to the center housing, provides an engine
exhaust inlet and outlet, and houses the compressor wheel.
The
compressor housing bolts to the center housing and provides an
ambient air inlet and a compressed air outlet. If damage occurs to
either the impeller or compressor wheel, you must replace the
complete rotating assembly.
The dynamically balanced rotating
assembly consists of the following components:
o Turbine wheel and shaft assembly.
o Piston ring.
o Thrust spacer.
o Compressor wheel and wheel retaining nut.
Two pressure lubricated bearings support the rotating element in the
center housing. The center housing has drilled internal oil passages
to provide lubricating oil to the turbine wheel shaft bearings,
thrust washer and collar, and spacer. The turbocharger receives its
lubrication from the engine lubrication system. During turbocharger
operations, exhaust gasses from the engine go through the impeller
housing causing the impeller and shaft to rotate.
The compressor
wheel mounted on the opposite end of the impeller shaft and rotates
with the turbine wheel. The compressor wheel draws ambient air into
the compressor housing, compresses the air, and delivers it to the
engine blower air inlet housing. During operation, the turbocharger
responds to engine load demands by reacting to the flow of engine
exhaust gasses.
As the power output of the engine increases, the
flow of exhaust increases, and the speed and output of the rotating
assembly increases proportionately.
w. The Limiting Speed Mechanical Governor (Fig. 19). A limiting
speed mechanical governor controls the engine idle speed and limits
the maximum operating speed.
Stamped on the name plate attached to
the governor housing are the governor assembly number, type, and idle
speed range.
The letters D.W. - L.S., stamped on the name plate,
indicate it is a double weight, limiting speed governor.
The
governor mounts between the engine blower and the flywheel housing.
The driven gear of the blower drives the governor.
The cover and
lever assembly, and governor weight and shaft assembly are the basic
parts of the governor.
23
OD1713
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