Rainier 2WD V8-5.3L VIN P (2004)
Alternator: Description and Operation
GENERATOR
The AD-244 generator is non-repairable. They are electrically similar to earlier models. The generator(s) feature the following major components:
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The delta stator
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The rectifier bridge
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The rotor with slip rings and brushes
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A conventional pulley
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Dual internal fans
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A voltage regulator
The pulley and the fan cool the slip ring and the frame. The AD stands for Air cooled Dual internal fan; the 2 is an electrical design designator; the 44
denotes the outside diameter of the stator laminations in millimeters, over 100 millimeters.The generator is rated at 150 amperes.
The generator features permanently lubricated bearings. Service should only include the tightening of mounting components. Otherwise, the generator is
replaced as a complete unit.