Alternators: How They Work & How To Fix Them. Case 170B Excavator.

Published at : 23 Dec 2025

My charging system is not working in this 40 year old machine. It could just need a new alternator, but it could also have wiring problems, or both. I go through a troubleshooting process and tear down and attempt to fix the alternator, plus find some other problems, and end up with a thorough understanding of how charging systems and alternators work.

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