Hey Bus Driver - several things to know about the SI series Delco alternators:
1 - Alternators rated 63 amps and below are the 10SI family. Ratings 70 amps and higher are 12SI. (Amp rating is stamped on the front half near the tensioning ear next to the part number .) The 12SI is somewhat larger than the 10SI. But they are otherwise completely interchangeable.
2 - The SI alternator rear half - hence the aux connector and output post - can be easily clocked (repositioned) relative to the pivot ear in 90 deg increments. Simply remove the 4 through screws that hold the halves together then carefully rotate the rear half as desired and replace the screws.
3 - Don't worry about water getting into the alternator. The SI series are pretty tough - a small amount of rainwater getting into the alternator won't hurt a thing!
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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