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Re: 493 June 28, 2019

July 15, 2019 10:59AM avatar
I should point out (or re-emphasize) that once all the partially broken bolts were worked out of 497, she settled down to breaking perhaps one or two a year. Most of the broken bolts we changed had been changed several times before. With each bolt change, the bolt hole gets reamed to the next size larger. I do not know what the original size for the bolts was (perhaps 7/8") but we were changing out bolts bigger than 2". The larger the bolt, the less it can flex with the expansion of the steel, which causes it to break more easily. Our solution was to weld up the bolt holes. Later we developed "doughnuts" of steel with the proper sized staybolt hole in them. The old broken bolt was removed and the hole enlarged to 3"+ and the new steel welded in to both the firebox and the outer wrapper. Then a proper sized staybolt was installed.

Apparently, 497 never got a major firebox renewal that the other 490's got in the 40's and 50's. If this had been done, the over sized boltholes would have been welded up and stock-sized stays installed.

And yes, the back lower corners of the firebox was where our first troubles were. This was also where the leakers were when the D&S turned it over to us, and the source of the in-cab steam leaks.



Edited 1 time(s). Last edit at 07/15/2019 11:01AM by Earl.
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493 June 28, 2019 Attachments

Jerry474 June 29, 2019 08:56AM

Re: 493 June 28, 2019

sp4149 June 29, 2019 09:25AM

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Earl June 29, 2019 11:30AM

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Drew Eisenman June 29, 2019 02:09PM

Re: 493 June 28, 2019

Jeff Taylor June 30, 2019 07:24AM

Re: 493 June 28, 2019

cwallace June 30, 2019 09:02AM

Re: 493 June 28, 2019

Kelly Anderson July 01, 2019 08:10AM

Re: 493 June 28, 2019

Earl July 01, 2019 11:35AM

Re: 493 June 28, 2019

Kelly Anderson July 01, 2019 12:16PM

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MD Ramsey July 01, 2019 01:21PM

Re: 493 June 28, 2019

Brett Wiebold July 14, 2019 10:58PM

Re: 493 June 28, 2019

Earl July 15, 2019 10:59AM

Re: 493 June 28, 2019

Kelly Anderson June 30, 2019 08:10AM

Re: 493 June 28, 2019 Attachments

Jerry474 July 01, 2019 08:19AM

Re: 493 June 28, 2019

drgwk37 June 29, 2019 04:58PM

Re: 493 June 28, 2019

drgwk37 June 29, 2019 03:44PM

Thanks Jerry

Kevin Cook June 29, 2019 04:25PM

Re: 493 June 28, 2019

Greg Scholl June 30, 2019 10:52AM

Re: 493 June 28, 2019

pd3463 June 30, 2019 12:34PM

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ivb361 June 30, 2019 03:20PM

Re: 493 June 28, 2019 Attachments

Jerry474 June 30, 2019 03:39PM

RGS 42

Kevin Cook June 30, 2019 03:47PM

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Jerry474 June 30, 2019 05:14PM

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ivb361 June 30, 2019 05:35PM

Re: RGS 42

Greg Scholl June 30, 2019 07:40PM

464 now a Soak

Kevin Cook July 01, 2019 11:06AM

Re: 464 now a Soak

Will Gant July 01, 2019 01:26PM

Re: 464 now a Soak

Jeff Taylor July 01, 2019 04:15PM

Re: 464 now a Soak

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Re: 493 June 28, 2019

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Re: 493 June 28, 2019

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Brian Norden July 01, 2019 11:21AM

Re: 493 June 28, 2019

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Re: White Pass 69

Greg Scholl July 02, 2019 05:58AM

Re: 493 June 28, 2019

Jeff Taylor June 30, 2019 12:36PM

Re: 493 June 28, 2019

Kelly Anderson July 01, 2019 08:19AM

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Greg Scholl July 01, 2019 09:45AM

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AZ Railfan July 02, 2019 09:16AM

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Roger Hogan July 02, 2019 08:31AM

Re: 493 June 28, 2019

Jerry474 July 02, 2019 09:18AM



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