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Farmall & IHC Tractors Discussion Forum
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Timing Teeth in Pan (1256)

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Dan

07-10-2004 05:32:34




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Hate to repost, but this goes along with the 1256 engine post. Took the pan off to find timing teeth in the pan, looks like 3-4 maybe. Did one break off and take the others with it? I had 3-4 bent push rods, so I assume there was a restriction of some kind, but if the teeth got broke first, and then the cam out of time, that would have bent them also. No visible damage to the head, valves or cylinders. The tractor is split, awaiting the engine to be pulled.

Also I was wondering what to replace and what not on these old 407? We were probably doing a complete overhaul, including the head of course, but a lot of guys talk about just doing rings, mains and rods. It is remarkable how little wear is on the sleeves after 10,000 hours.

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RPM

07-12-2004 06:12:18




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 Re: Timing Teeth in Pan (1256) in reply to Dan, 07-10-2004 05:32:34  
Be carefull, this engine probably has a worn front crank pulley, this is a quirk of this engine after years and many hours, the rubber looses its ability to dampen the shock load, it will break teeth off timing gears, break cam or crank snout. Only safe fix is NEW pulley, gears & other parts could be used.



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Dan

07-12-2004 17:59:16




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 Re: Re: Timing Teeth in Pan (1256) in reply to RPM, 07-12-2004 06:12:18  
Thanks again RPM. Something I have not heard, and would not have know if you hadn't alerted me too it. Very much appreciated.



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