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Reply to "The LAST Mike Wolf MTH Big Boy To Be Produced!"

I was able to look at a Mike Wolf Big Boy and compare the centipede tender truck to the one on my DM&IR Yellowstone, which uses the exact same truck assembly. Both have the same wheel gauge (measured with calipers), with bushings to limit side to side movement on axles 1&5, with the middle three axles having no bushings, to allow them to shift as the truck goes around curves. The wheels on axles 1&5 on the Yellowstone tender have more side to side movement than the same axles on the Big Boy tender. Using a feeler gauge I could get a 2.5mm one between the wheel and bushing the Yellowstone tender, but barely got a 1mm gauge between the wheel and bushing on the Big Boy tender.

Here's the gap between the wheel and bushing on the DM&IR Yellowstone.

20220429_220020

Here it is on the Mike Wolf Big Boy.

20220429_215904

This could be causing the issue, especially if the 072 curves the Big Boy runs on aren't exactly perfect.

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

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