Exploded view drawing for a 4012, Legacy Big Boy? FIXED !!!! | O Gauge Railroading On Line Forum

Don(Cerritos)OGR Forum Member

Ran into a problem today, hear a strange noise coming from the Big Boy. The second set of drivers were not turning, and what appeared to be like a drive shaft above the wheel assembly is spinning. Then noticed the drivers are free spinning! Need to see if I can get the drive shaft reset in a gear box I think.

Any help on locating an exploded view document sure would help!!

Thanks

FIXED !!!

As a result of the documentation you guys provided, and an email from GGG, I was able to FIX the engine !!!! Turned out the problem was a VERY small screw came out of the bottom cover that holds the gear box in place. That permitted the drive gear to drop away letting the drive shaft free spin, from not meshing. FOUND the missing screw and put in, no more problem! Did take the long way around, removed the boiler, dropped the drivers BEFORE I found the real problem!!!

Thanks for the assistance!

11/26/178:38 PM

Original Post

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bigdodgetrainOGR Forum Member

try this

https://ogrforum.ogaugerr.com/...boy-tons-of-pictures

11/26/179:34 PM

Gerry BurnsOGR Forum Member

Parts list...

https://www.lionelsupport.com/...07-9867-20bf06b41944

11/26/179:45 PM

Don(Cerritos)OGR Forum Member

Thank you very much for the time and information you both have supplied. At least I now have a starting point.

Don

11/27/172:09 AM

Don(Cerritos)OGR Forum Member

Success !

11/27/177:10 PM

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

So, what was the problem?

11/28/179:05 AM

Don(Cerritos)OGR Forum Member

Problem:

Ran into a problem today, hear a strange noise coming from the Big Boy. The second set of drivers were not turning, and what appeared to be like a drive shaft above the wheel assembly is spinning. Then noticed the drivers are free spinning! Need to see if I can get the drive shaft reset in a gear box I think.

Solution:

As a result of the documentation you guys provided, and an email from GGG, I was able to FIX the engine !!!! Turned out the problem was a VERY small screw came out of the bottom cover that holds the gear box in place. That permitted the drive gear to drop away letting the drive shaft free spin, from not meshing. FOUND the missing screw and put in, no more problem! Did take the long way around, removed the boiler, dropped the drivers BEFORE I found the real problem!!!

11/28/1710:32 AM

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

For lack of a screw...

Thanks for the solution, it might help someone in the future.

11/28/175:15 PM

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