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John Deere Tractors Discussion Forum
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Re: Valve guide replacement

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Pat Browning

07-24-2005 12:45:51




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Roger that -- I have to just sit back in awe when reflecting on the high quality mecahnical engineering brought forth during the late 20's and the 30's -- a period of time when things really were pretty rough in this country economically. Antique tractor pulls are evidence sufficient to the strength of transmission and final drive sections of these old tractors -- and enough cannot be said about engine design during this period. Thanks Frank.

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F-I-T

07-24-2005 13:10:42




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 Re: Valve guide replacement in reply to Pat Browning, 07-24-2005 12:45:51  
Well, labor was cheaper back then, so they forged more often, not to mention the love all the manufactures had with the newly developed Vanadium Steels.

I have always been in awe of the precision of a roller or ball bearing, and the relative low cost of such a device. I know they can get pricey today, but man! $5 or $6 for a gadget that is true when built new to +/- a few millionths?

Unbelieveable!

Frank

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Pat Browning

07-24-2005 14:04:41




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 Re: Valve guide replacement in reply to F-I-T, 07-24-2005 13:10:42  
Frank -- think for a bit -- of the importance factories making bearings had in WW2! You are dead right -- bearing design played a mojor role in the overall mechanical design patterns. How sweet it is!



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F-I-T

07-24-2005 17:03:53




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 Re: Valve guide replacement in reply to Pat Browning, 07-24-2005 14:04:41  
Oh, I don't have to think. My Dad spent several of his 25 B-24 missions out of Italy going after ball bearing plants.



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