February 15, 2019 09:06AM
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Registered: 16 years ago
Posts: 1,465
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I assisted Mark Yeamans with the 497's throttle valve re-design while working as a machinist helper in Durango in the 1980's. Much had to do with not just the throttle itself, but also the linkage and adjustment of the throttle lever.
It is my understanding that the throttle lever and location (in the cab) on the 491 is not the original but a modified version that was installed when the locomotive was returned to service at the museum. In my experience with the 497, especially prior to that throttle modification, the ability to have the linkage and throttle set up so as to provide minimum effort as possible to open and close the throttle is important. Not sure what happened to the original, but wonder if this may be a contributing factor as to why it is especially difficult to manage?
MDR
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Carl T. Henderson |
February 13, 2019 07:10PM |
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Samart |
February 14, 2019 07:17AM |
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alcofan |
February 14, 2019 10:28AM |
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Sharrod |
February 14, 2019 12:02PM |
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Chris Walker |
February 14, 2019 12:25PM |
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cdaspit |
February 14, 2019 12:56PM |
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John Bush |
February 14, 2019 02:48PM |
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guymonmd |
February 14, 2019 04:03PM |
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cdaspit |
February 14, 2019 04:12PM |
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Jimr260 |
February 14, 2019 04:50PM |
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Samart |
February 14, 2019 06:19PM |
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Randy |
February 14, 2019 06:48PM |
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pd3463 |
February 14, 2019 06:48PM |
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Brett Wiebold |
February 14, 2019 07:10PM |
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Mark Huber |
February 15, 2019 03:30AM |
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MD Ramsey |
February 15, 2019 09:06AM |
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SebJ |
February 15, 2019 01:57AM |
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Samart |
February 15, 2019 07:41AM |
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Stephen G |
February 15, 2019 08:31AM |
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Brett Wiebold |
February 15, 2019 01:29PM |
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rehunn |
February 15, 2019 03:41PM |
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SR_Krause |
February 15, 2019 03:54PM |
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John K |
February 15, 2019 04:39PM |
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Randy |
February 15, 2019 04:52PM |
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John Bush |
February 15, 2019 04:56PM |
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Sharrod |
February 16, 2019 06:09AM |
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Mark Huber |
February 16, 2019 08:52AM |
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Earl |
February 16, 2019 09:39AM |
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Sharrod |
February 17, 2019 07:34AM |
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Mark Huber |
February 17, 2019 02:11PM |
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John Bush |
February 15, 2019 04:54PM |
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rehunn |
February 15, 2019 05:17PM |
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John K |
February 15, 2019 06:14PM |
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hank |
February 16, 2019 08:49AM |
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Mark Huber |
February 16, 2019 04:32AM |
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GeorgeGaskill |
February 21, 2019 10:17PM |
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Earl |
February 15, 2019 08:09PM |
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Russo Loco |
February 15, 2019 09:54PM |
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John K |
February 16, 2019 09:51AM |
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Earl |
February 16, 2019 10:09AM |
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Sharrod |
February 17, 2019 07:34AM |
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John K |
February 17, 2019 11:24AM |
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cdaspit |
February 17, 2019 01:16PM |
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Stephen G |
February 17, 2019 03:33PM |
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Kelly Anderson |
February 18, 2019 07:55AM |
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kcsivils |
February 18, 2019 08:18AM |
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Everett Lueck |
February 17, 2019 08:51AM |
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Greg Scholl |
February 17, 2019 09:22AM |
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Russo Loco |
February 17, 2019 01:24PM |
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Earl |
February 17, 2019 09:11PM |
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Everett Lueck |
February 17, 2019 10:14PM |
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michael |
February 20, 2019 08:10PM |