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Old 12th February 2018, 21:46
62440 62440 is offline  
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Join Date: Jun 2009
Location: Loughborough.
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Hello Streak 19. As Master Cutler said, Ivatt introduced several design improvements, one of which was fitting Timken Roller bearings to certain Locos. To quote from the book "Stanier Locomotives" by Brian Haresnape (Page 48), "To accommodate the Timken axle boxes under the ashpan, used on some Locomotives, the trailing driving wheels on these final batches were moved 4in. back". Where the other 4 inches came from I have no idea.
Hope this helps.

Regards, 62440.
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