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Farmall & IHC Tractors Discussion Forum
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Is the rookie missing something?

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P and R Pete

10-12-2005 21:38:03




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While awaiting my governor back, decided to check the valve clearance. Not having a crank, I'm using a bar on the ring gear to turn the engine. Lined-up the #1 TDC mark no problem, (the marks on the camshaft gear were by the distributor) and had to tighten up the exhaust valve. Turned the flywheel 180 degrees clockwise, (looking at the flywheel from the rear). The firing order is 1-3-4-2. There is no 180-degree mark on the flywheel so I counted 45 teeth on a 90 tooth ring gear. There is not a nanometer of play in either valve at #3 cylinder.
What I'm asking is: am I right, that the flywheel turns clockwise, looking from the rear?

Also, the manual calls for .014 clearance "with the engine at operating temperature". I've never had any vehicle that didn't want the valves checked 'cold'. Can/should there be some compensation for my engine as I'm doing it now? Heck, I have it all wide open.

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scotty

10-13-2005 04:49:33




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 Re: Is the rookie missing something? in reply to P and R Pete, 10-12-2005 21:38:03  
Pete, Keep in mind that using Bobs chart, you are adjusting four valves at TDC, and then you are cranking the engine 360 degs and setting the last four valves, not 180 degs as you mentioned. Hope this helps.

scotty



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P and R Pete

10-13-2005 05:05:36




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 Re: Is the rookie missing something? in reply to scotty, 10-13-2005 04:49:33  
Thanks, Scotty.
That much I DO understand. The 180 degrees was to do the valves one cylinder at a time, in order of firing. My VW beetle had marks on both sides, 180 apart. It's what I was used to.



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scotty

10-13-2005 05:26:02




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 Re: Is the rookie missing something? in reply to P and R Pete, 10-13-2005 05:05:36  
Pete, Another thing I found helpful when I had the Super A apart, was filing a groove in the crankshaft pulley and painting it white, easier to see than laying on your back under the tractor!

scotty



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El Toro

10-13-2005 04:01:27




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 Re: Is the rookie missing something? in reply to P and R Pete, 10-12-2005 21:38:03  
You could set them at .017" cold and once the engine is heated up you can recheck them. Should be close to .014" when the engine is hot. Hal



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P and R Pete

10-12-2005 21:54:55




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 Re: Is the rookie missing something? in reply to P and R Pete, 10-12-2005 21:38:03  
Never mind.
*Duh*
I looked at the crankshaft pulley where the hand-crank would go. It cranks the flywheel counter-clockwise, viewed from the rear.

Of all the things I've lost, I miss my mind the most.



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Bob

10-12-2005 21:51:09




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 Re: Is the rookie missing something? in reply to P and R Pete, 10-12-2005 21:38:03  
third party image

As viewed from the rear, the flywheel turns CCW.

You can set 1/2 of the valves at each of two crankshaft positions.

Here's a valve setting chart, from the Cub Collector's Site:



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P and R Pete

10-12-2005 22:00:30




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 Re: Is the rookie missing something? in reply to Bob, 10-12-2005 21:51:09  
Bob, thanks a bunch. No more counting teeth. What a boon.

Any thoughts on the valve temperature? Your chart says "engine warm". Do I have to run it for ten minutes first?



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MN Scott

10-13-2005 06:32:11




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 Re: Is the rookie missing something? in reply to P and R Pete, 10-12-2005 22:00:30  
In my factory IH manuals for 300 and 400 series diesel engines there is a side note that states "Warm engine means any tempature above 30' ".



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PR Pete

10-13-2005 07:01:45




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 Re: Is the rookie missing something? in reply to MN Scott, 10-13-2005 06:32:11  
Scott, I called the IH shop that has my governor, and the service manager said the same thing, that 'warm' means anything other than frozen, or such like that.
But a few hundreths is a big difference in this measurement. That's why I wanted to tap the general wisdom here.



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Bob

10-12-2005 22:13:32




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 Re: Is the rookie missing something? in reply to P and R Pete, 10-12-2005 22:00:30  
I would check them now, and, if they are reasonably close, leave them alone, and then run it when you get the governor back, and check them again warm.



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