[AT] tractor engine

[Guy Fay]

Allis made some large Diesels in the late 1970s. They're discussed in 
Wendell's Allis book.

Tom wrote:

>charlie hill wrote:
>  
>
>>To heck with the engine and the tool box.  I want to see the machine shop
>>they turned the bearing surfaces in.
>>
>>Actually Allis Chalmers built some engines about that size in the early
>>70's.  They didn't have as much rated HP but the actual engine size was
>>similar.   I still wonder how they turn the bearing journals.
>>
>>Charlie
>>    
>>
>
>I didn't think Allis was into large marine engines, Fiat was.
>Perhaps that was the connection?
>
>As for machining the cranks, the cranks are of built up construction,the throws
>being machined before the main bearing
>journals are shrunk in and the crank assembled. After assembly
>the mains are then remachined.
>
>I've posted some pics of a throw, one being machined, and a crank
>shaft lathe that is capable of machining the crank of the big Sulzer. Capacity
>300 tons:
>
>http://shopswarf.orcon.net.nz/crnkthrow.jpg
>
>Tom
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>  
>