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Reply to "What do you think this noise coming from a Lionel Legacy S3 6-84065 is?"

@Paul Kallus posted:

I've noticed that sound coming from my Milw. Road S-3. If I don't grease that u-joint will it damage or prematurely wear out?

I don't think it would wear out.  The "cups" should be metal.  I'm guessing that the dogbone shaft is plastic.  If anything is going to fail, I think it would be the pins on the dogbone shaft.  That shaft is an inexpensive part used on several different models.  Even if it ceases to be available, specialty companies like Northwest Short Line, Stock Drive Products, etc., offer kits to make your own universal shaft in any desired length.

That being said... depending on your comfort level with taking things apart, warranty issues, etc., I would do the grease job just to be sure it's NOT a broken encoder ring, or wires rubbing on the flywheel.  My $.02.

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