Comments on: Replacing Cracked Driving Gears on Trucks of 3 Truck Shay Locomotive https://blog.model-train-help.com/2016/11/replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive.html?utm_source=rss&utm_medium=rss&utm_campaign=replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive Model railroads and model trains Wed, 30 Nov 2016 15:59:35 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Dick Lobach https://blog.model-train-help.com/2016/11/replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive.html#comment-16517 Wed, 30 Nov 2016 15:59:35 +0000 http://blog.model-train-help.com/?p=4214#comment-16517 I bought metal gear sets from Bachmann for my 3 truck Shay, they work great. Go to their web site for replacement parts.

]]> By: Ron Scannell https://blog.model-train-help.com/2016/11/replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive.html#comment-16432 Wed, 23 Nov 2016 22:07:51 +0000 http://blog.model-train-help.com/?p=4214#comment-16432 I don’t know if tbis will help, but check Northwest Short Line, they have a side variety of brass gears and may have a suitabke replacement

]]> By: David A Stokes https://blog.model-train-help.com/2016/11/replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive.html#comment-16401 Wed, 23 Nov 2016 03:45:10 +0000 http://blog.model-train-help.com/?p=4214#comment-16401 “plastic” gears are either Delrin, or a form of common styrene. Or they can be nylon. Not having had this experience yet (I’m sure to one day), is it possible to remove the gear from the shaft and reassemble it with the proper glue, then carefully ream the central hole so it’s a slip fit on its axle.
And then glue it in place with silicon sealant. WHY? These gears crack because of differential expansion, the axle shaft grows more quickly than the hole in the gear, which is a friction fit backed up with Loctite or similar CA glue.

If the hole is slightly larger than the shaft and the fixing medium is flexible then maybe the gears won’t crack again. I’m talking gnats whiskers here guys but common sense suggests that this might just work.

]]> By: Ted https://blog.model-train-help.com/2016/11/replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive.html#comment-16253 Thu, 17 Nov 2016 23:54:56 +0000 http://blog.model-train-help.com/?p=4214#comment-16253 For sure Bachmann has the metal gears. I recently bought the middle truck for the Shay for around $40. Good luck.

]]> By: Robert https://blog.model-train-help.com/2016/11/replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive.html#comment-16243 Thu, 17 Nov 2016 01:56:17 +0000 http://blog.model-train-help.com/?p=4214#comment-16243 You could try Bachmann website http://estore.bachmanntrains.com/index.php?main_page=index&cPath=66_68_689

]]> By: Newman Atkinson https://blog.model-train-help.com/2016/11/replacing-cracked-driving-gears-on-trucks-of-3-truck-shay-locomotive.html#comment-16242 Thu, 17 Nov 2016 01:34:42 +0000 http://blog.model-train-help.com/?p=4214#comment-16242 Kevin, The guys in my Friday night train running group have had the same issues with other engines and are getting replacement gears better than the plastic. I will ask the question to them and see if there is a source. Newman Atkinson Terre Haute Indiana USA

]]>