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Case Tractors Discussion Forum
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DC Timing marks

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George S. in th

09-21-2007 05:06:59




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I got a 51 DC, used to start on first or second try. This summer it did not so I took off and cleaned points. I kept coupling in reference to marks I put on it but I had the
rotor off and am not sure that it is correct. It is now aligned to the two red dot marked gear teeth. Problem is I am not sure where it was before, so I want to check it to engine crank location. Owners book does not show anything on this. Can one of you fellows tell me where I can find
the marks. My guess is the left clutch opening. Thanks, George

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George S. in the real N.Y

09-21-2007 16:48:43




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 Re: DC Timing marks...Thanks in reply to George S. in the real N.Y, 09-21-2007 05:06:59  
Thanks guys for the info. I'll try the plug and see how
things look. I think the first time a few years back that I had the mag apart, I kept the rotor is same position relative to the coupling
when I assembled it. This time I did not so I have no idea if it is in time. Since it won't start, I'm guessing this is the nature of the problem. I'll give it a look Sun or Mon. Thanks, George S.

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Mathias NY

09-21-2007 10:19:07




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 Re: DC Timing marks in reply to George S. in the real N.Y, 09-21-2007 05:06:59  
I"m not sure if I understand completely which gears you are refering too. If you removed the rotor in the magneto, it will also need to be installed at a particular orientation. The link below should explain how to time that gear correctly (assuming its a Case mag).

This spring I went through timing the engine like Scott decribed but couldn"t make the tractor run. It turns out the shop that rebuilt my magneto inserted the rotor about 2 gear teeth out of time.

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Scott KY

09-21-2007 05:31:32




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 Re: DC Timing marks in reply to George S. in the real N.Y, 09-21-2007 05:06:59  
There is a pipe plug on the right side of the clutch housing you remove. Rotate the flywheel until you see a "D" in the hole. That will be TDC. Make sure you are on the compression stroke and not the exhaust.



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