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Reply to "Whistle tender motor problem"

@GeoPeg posted:

I started to write the same response as @jth877 above, but I see he beat me to it! When I can't get a replacement brush plate, I repair wallowed out brush plate armature holes with a simple Oilite sleeve bearing from McMaster Carr, 0.125" inside diameter, 1/4" length - this is twice as long as the original and adds a degree of stability. I've had 100% success with that so far (maybe 7 or 8 done.) If you can find a replacement brush plate, go that route - it's easier!

What tender is this? Is there a number stamped on the bottom?

One more thing I would check - did you clean the brush wells? They can easily get gunked up and cause one or both brushes to stick, which could cause the problem you're seeing.

Also, check the brush spring tension. I guess only experience can tell your fingers what's the right tension or what's too wimpy. But you can usually sense if there's a difference between the two - if you feel a difference, that is a good indicator that one of them has weakened, usually due to heat. If that's the case, always replace both with new only, no used ones!!

George

I've seen the straight non-flanged bearings available. How do you get them to stay in place? The oil wick retainer? Is the outside diameter 0.250" . I might order a few to try.

The OM-3 has a nice small diameter flange that when banked up against the inside on the brush plate keeps it from walking out of the hole. It's small enough in diameter that it doesn't short the brush holders.

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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