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Allis Chalmers Discussion Forum

The C is Home!!

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11-29-2003 20:10:07

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Well, I finally went and got my little C that I bought. Bought it pretty reasonable because it has some engine problems. It runs , but I haven't heard growling and knocking like that since the last presidential debate! Didn't get much time to play with it , but I had just enough time to pull the valve cover and the oil pan. Top end had some slighlty bent pushrods. I didn't get a chance to pull the bearing caps yet , but I found there was oodles & gobs of crankshaft end play. I also saw that someone had been in there before me as one piston and rod was new. Does anyone know what the crank endplay supposed to be? Is this corrected by the bearings on these little tractors or on having the crank reworked? This tractor ought to be a fun little project. I have overhauled lots of tractors (D17's, Ford 861's, 8n's, IH 1086's...)but this will be the first I have worked on where shims are used to set the clearance. Wish me Luck!


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12-02-2003 23:15:14

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 Re: The C is Home!! in reply to Scot(MO), 11-29-2003 20:10:07  
Scot, the Allis-Chalmers factory service manual does not address end play at all, not even mentioned. So I suspect they depend on the bearings and journals being in good shape to control it as there is no adjustment as such. That would be the best place to start for sure. It states that the shaft should be replaced if either out of round or tapered more than 0.004". It further states that if the shaft is worn undersize 0.0025" or more, undersize bearing inserts should be used. It also cautions to clean the oil return grooves on the front and rear ends of the crankshaft, and that they should not be worn or nicked. Good luck and God Bless.

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12-01-2003 05:31:53

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 Re: The C is Home!! in reply to Scot(MO), 11-29-2003 20:10:07  
Scott, can't answer your technical questions but wanted to wish you good luck with your new project! Be sure and post before and after pictures in the photo gallery if you get a chance.

Enjoy your new tractor!

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