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JD valve seat depth

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Catskill Pete

06-10-2003 07:05:47




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Getting ready to do a valve job on a 2640. I seem to remember there is a rule about getting the valve seat depth correct, or JD's start hard. My shop guy has heard something about it too, but doesn't remember the details. Need more info before I open up that can of worms.




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G Taylor

06-10-2003 13:40:01




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 Re: JD valve seat depth in reply to Catskill Pete, 06-10-2003 07:05:47  
Use new valves and seats. A few thou of valve sinking lowers the compression and makes a new built diesel a hard starter.



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Gord

06-10-2003 09:03:20




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 Re: JD valve seat depth in reply to Catskill Pete, 06-10-2003 07:05:47  
If the tractor has a 4239 engine in it-the valve recession from the head surface should be -
Intake-0.024"to 0.047" and Exhaust 0.039" to 0.071". It is best to stay as close to the minimum recession as possible.



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