Fw: J Class Changes

[NW Mailing List]

Rick,

Below is Louis Newton's response to my query.

Bud Jeffries

----- Original Message ----- 
From: "Louis Newton" <lmnewton at verizon.net>
To: "Lewis Ingles Jeffries" <ljeffries2 at verizon.net>
Sent: Wednesday, September 03, 2008 10:21 AM
Subject: Re: J Class Changes



> Bud,

>

> The lightweight rods used on the J's and the last 5 A's were forged and 

> machined at Roanoke Shops.  The material in them was Timken high-dynamic 

> steel, a special alloy developed by Timken.   The webs of the main roads 

> were 1/2-inch in thickness, and those of the parallel roads only 1/4-inch 

> in thickness.  The bearings, of course, were made by Timken.

>

> Louis

>

>>

>> ----- Original Message ----- 

>> From: "NW Mailing List" <nw-mailing-list at nwhs.org>

>> To: "NW Mailing List" <nw-mailing-list at nwhs.org>

>> Sent: Tuesday, September 02, 2008 5:41 PM

>> Subject: Re: J Class Changes

>>

>>

>>> Rick,

>>>

>>> The new rods were designed by the N&W's Motive Power Department and I'm

>>> almost positive that these rods were made in the Smith Shop of the 

>>> Roanoke

>>> Shops. I need someone like Louis Newton to verify this.

>>>

>>> Just a word of caution about the "first" edition of my book: it did not

>>> have the information about the single rods. The revised edition has a 

>>> lot

>>> of data and information that I got access in the ensuing 25 years of

>>> research after publishing the original edition.

>>>

>>> Bud Jeffries

>>>

>>> ----- Original Message ----- 

>>> From: "NW Mailing List" <nw-mailing-list at nwhs.org>

>>> To: "NW Mailing List" <nw-mailing-list at nwhs.org>

>>> Sent: Tuesday, September 02, 2008 5:14 PM

>>> Subject: Re: J Class Changes

>>>

>>>

>>>> Thanks to Bud Jeffries for the details on the J rod replacements.  I

>>>> write most of my comments from my computer at work, and my reference

>>>> books are at home.  I forgot about the 610 getting new rods.  I should

>>>> keep my first edition of Bud's book at work.

>>>>

>>>> Bud--Were these rods cast in Roanoke shops, and who designed the 

>>>> change?

>>>>

>>>> Rick Morrison

>>>> -

>>>> Subject: Re: J Class Changes

>>>>

>>>>

>>>>> Dave is correct, there were four J's that got the redesigned single

>>>>> rods: 600, 605, 610 and 611. These were applied from 1952 to 1956-7 as

>>>>> needed when a stress fracture appeared on a crankpin. This rod change

>>>>> involved replacing the front, rear and intermediate side rods, the 

>>>>> main

>>>>> and eccentric rods, the intermediate driving wheels, and all of the

>>>>> crankpins. This was very costly, therefore was only done when 

>>>>> required.

>>>>> These rods were designed in 1952 and were not interchangeable with

>>>>> tandem rods.

>>>>>

>>>>> Other changes noticeable on the J's. Previously someone wrote about 

>>>>> the

>>>>> change in design of the steps on the pilot and this was done beginning

>>>>> in 1944. The bell was moved from the boiler top in the cowling to the

>>>>> pilot deck in front of the left cylinder; this treatment was applied 

>>>>> to

>>>>> the streamlined K2's as well beginning in 1953. And the spoke pilot

>>>>> wheels began being replaced in 1948 for the first 11 J's with solid

>>>>> rolled steel wheels; the 611-13 get these as built. Beginning in 1953

>>>>> these wheels were replaced with cast steel wheels that were also 

>>>>> solid.

>>>>>

>>>>> One J, no. 602, was built in 1942 with a trailer truck booster which

>>>>> required some external piping. This was removed in December 1945 along

>>>>> with the piping.

>>>>>

>>>>> Of course the six J-1's were built in 1943 with heavy non-roller 

>>>>> bearing

>>>>> rods and not being streamlined. From September to November 1944, the

>>>>> J-1's were streamlined, received lightweight roller bearing rods and

>>>>> then classed as J.

>>>>>

>>>>> These were the visible changes. There were quite a few changes that 

>>>>> were

>>>>> not visible.

>>>>>

>>>>> Bud Jeffries

>>>>>

>>>>>

>>>>

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>>>>

>>>

>>>

>>> ________________________________________

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>>>

>>

>>

>

>

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