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 - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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