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Tricky Timing Question

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Josh

08-20-2004 18:40:51




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OK I am to the stage of my rebuild where I line up the single dot on the crank gear with the single dot on the cam gear, and then the double dot of the cam with the double dot of the distributor/magneto/governor (whatever you want to call that gear). Sounds nice and simple right? Well my crank has two single dots, and my camshaft gear has two single dots and one set of double dots. I thought ok if I line up a single dot on the crank with one on the cam when I rotate 180 degree's maybe they will still match up. Nope.... they don't. They are one tooth off. So now what do I do? I don't have my camera on hand show visually show you what I am talking about but I am hoping someone on here will have experienced this problem before and will have a picture of a properly timed gear set. Or if you know what dot goes with what dot and can explain it please do so! Thank a bunch! PS this is my Farmall Super C 1953.

Josh

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El Toro

08-22-2004 13:34:51




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
Hi Josh, Count the teeth on your cam gear, it should be 64 or 62 teeth. The other gears would have 32 or 31 teeth each. I was counting the teeth in my IH manual on a Farmall C. The Super C
should be the same. There should be a 2 to 1 ratio between the cam gear and the smaller gears.
One revolution of the cam gear to two of the small gears. Hal



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Josh

08-22-2004 17:47:56




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 Re: Tricky Timing Question in reply to El Toro, 08-22-2004 13:34:51  
Hal thanks for your updates. I still don't know if I have this correct though. I am going to post a fresh question so it apears on the front page and I have pictures to describe my problem. Hopefully you will be able to help me out!



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El Toro

08-22-2004 10:17:47




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
Hi Josh, Have you made any headway with the timing gear train? I've been thinking about this
and does the cam gear have 1 single dot and a double dot 180 degrees opposite of each other?
Install the single dot on the crankshaft gear above the keyway and the double dot on the distributor gear. Count the teeth between each set of dots on the cam gear to see if they are the same. A friend of mine was a mechanic at IH
for years. I'll give him a call in the morning
to see what he has to say. Are all these new gears that you are installing? Hal

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El Toro

08-21-2004 19:42:42




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
Hi Again Josh, Rotate engine until No1 cyl is at TDC then install cam gear as you did the first time and see if it is still off one tooth when
you rotate the engine 180 degrees. With the crankshaft keyway at 12 o'clock the dot on this
gear should be directly above the keyway. I wouldn't know why they would have so many punch marks on the cam gear since you only have 3 gears to align unless it is used on other tractors. Hope this helps, Hal

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El Toro

08-21-2004 15:06:25




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
Hi Josh, The Super C must have different markings on the cam, crank and distributor gears than the Farmall C. I could be wrong, but I think
the crank and cam with 2 single dots should be
aligned together and the double dots on the cam gear should be aligned with the distributor gear double dots. I had a Super C, but I never had the engine apart. The Farmall C had 1 single dot on the cam gear and 2 dots on the cam gear. The
single dot on the cam gear aligned with the single
dot on the crank. The double dot on the cam aligned with the distributor gear double dots.

I'm surprised that someone didn't post a picture of the timing gear train for a Super C.
If there's an IH dealer near you they probably have an old service manual on the Super C. Good Luck, Hal

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Jim Becker

08-21-2004 08:23:07




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
I think all that Gene described should happen with cylinder 1 at TDC. You might want to start by setting at TDC then seeing of the other reference points start to line up.



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Gene

08-20-2004 23:00:40




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
The IT manual has a picture of the timing gear train. Double dot on camshaft gear matches double dot on distributor gear. Single dot on camshaft gear matches single dot on crank shaft gear.

The picture shows a keyway in the crankshaft gear. That key way appears to be at 12 O'clock may be 1 O'clock. There is also a key way for the crankshaft pulley. That keyway appears to be at the 3'clock position. If you get the crankshaft in this position the dot for lining up the cam gear will be the one in the 10 O'clock position or the first dot counterclockwise for the keyway in the crankshaft gear.

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Aces

08-20-2004 19:53:54




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
Josh it has been along time but, I thought that the dots were so that they were at the root between 2 teath of one gear and at the base of a tooth of the other gear so that the dots would be right at each other when they are in time. Should be same for all three gears when right.
Don"t know if this helps.



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ffolkes

08-20-2004 19:18:31




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 Re: Tricky Timing Question in reply to Josh, 08-20-2004 18:40:51  
I wish I could help you specifically, but I lack the knowledge. ;)

I just wanted to remind you to search the archives. A few days ago my (B) governor gear fell out and when I searched the archives, I saw posts talking about sets of dots 180 degrees from each other, etc. So you might be able to find someone who has already asked this instead of waiting for a reply.

Good luck, and I'm sure someone will be able to give you an intelligent response soon. :)

ffolkes

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