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The CS-121 and CS-130 Alternators are a complete departure from the SI
series alternators that They were designed to replace. The new features
include a high ampere output per pound of
weight, and a totally new and different regulator. A diode trio is not used.
A Delta stator, a rectifier bridge, and rotor with slip rings and brushes
are electrically similar to earlier models of alternators. (Figures1 and 2)
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The CS stands for Charging
System, and the 121 and 130 denote the outside diameter in millimeters of
the stator. By noting this number, the relative size and relative amperes
output between alternators can be compared.
The CS-121 and CS-130 features sealed bearings with lifetime
lubrication in both end frames. A conventional |
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fan mounted next to the pulley
pulls air through the assembly from the rear for cooling. An internal fan mounted on the
rotor pulls air through the slip ring end frame to cool the rectifier bridge,
regulator and rear bearing. The air is expelled through openings in the end frame. No
periodic maintenance on the alternator is required.
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