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42 Farmall H progress report....

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Steven@nd

05-09-2002 20:29:52




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Got a good day in on it today! Dad helped me put in the sleeves this morning (if I knew it was going to be that easy I would have done it myself!) As soon as they were in far enough to line up they fell right into place! Took ya'lls advice and removed the oil filter mount to make it easier to get in the tractor. Everything went together perfectly - well almost. I would have almost got it running tonight yet if we wouldn't have run into problems with the valves/rocker arms. Somebody screwed up somewhere because when I put the rocker shaft on all the valves were tight and I couldn't adjust them! We figure either my parts man ordered the wrong valves or the machine shop got the new seats in a little too far. We made spacers to go under the pedestals to raise everything up and it's perfect now. Over 100 psi compression on each cylinder and it hasn't even ran yet!! See pics below...

Steven


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BIG JOHN

05-10-2002 14:40:00




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
There are actually 3 different length valves both intake and exhaust. You must not have the right ones in place now.



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TNR

05-10-2002 12:30:41




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
Steven,only reason I ask is I left mine out once and I dont see yours on but you did put the round oil slinger back on the front of the crank didnt you?



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Steven@nd

05-10-2002 21:42:40




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 Re: Re: 42 Farmall H progress report.... in reply to TNR, 05-10-2002 12:30:41  
Yep, had to take the timing cover back off to put it on too!

Steven



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redrev

05-10-2002 09:12:00




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
The first piston that "fires" will make all you work worthwhile.



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Larry W.

05-10-2002 06:12:52




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
Steven, There are two different length valves for the H depending on the head being High altitude or not. When I had my head reworked, there was a delay because the parts guy ordered the wrong length. Fortunately for me, the machine shop guy caught it before he put the new valves in, and we just had to wait for the replacements. I don't know what will happen when you run it for a while, but I have seen a few now with the longer valves installed, and big nuts shimming the rocker arm to be able to get adjustment, and they ran them that way for who knows how long. Good luck.

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jal-SD

05-10-2002 06:04:28




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
Congratulations-another chunk of old iron will go back to work. Looks really GREAT, Steven! When ya gonna start on the other one? BTW-do you guys still have some snow up there? (My $0.02 worth. jal-SD)



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Theman

05-10-2002 05:14:56




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
Looks great Steven! Sure wish I'd have put the step-head pistons in my H. On the valves, it is possible that the wrong length may have been used. Gasoline, Kerosene, and Distillate heads had different valve stem lengths. If I had my Service manual here at work, I'd list the lengths. Now if you have the gasoline head and the valves are still too long, they are indeed the wrong valves. Since they're still adjustable and you've properly spaced the arm assembly evenly, it will work OK to start and see how it runs. I wouldn't recommend leaving it like that if you plan to work it hard for long periods of time. The reason is that the end of the valve stem isn't centered in the pad of the rocker arm. True, it will give you a few thousandths more valve travel (which is good), but it will also increase side load on the valve in the guide and cause more wear (which is bad).

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Steven@nd

05-10-2002 05:31:00




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 Re: Re: 42 Farmall H progress report.... in reply to Theman, 05-10-2002 05:14:56  
The thing I don't understand is that I have the distillate head. Casting number is 8776 D. It came from a dual fuel tractor that still had the adjustable manifold on it, and both tractors had the same heads on it. Did they change the deck height on the block during production? I have a 1944 block that I got from a salvage yard in it. As for being centered on the valve stem, they weren't centered on the engines when I took them apart. I'm going to take a closer look at them again today to see if it is going to work OK.

The pistons in mine are Conformatic. Step head cost $5 over flat top. And my whole engine kit cost less than just the sleeves and pistons from IH (firecrater).

Steven

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Theman

05-10-2002 08:35:09




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 Re: Re: Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-10-2002 05:31:00  
I'm not for sure about the block deck height being the same. If I had my parts book handy, it would probably show a serial number break and/or a different part number if there was a major change (and this type of change would qualify). On the valves, you said that new ones were ordered. Could the shop have possibly ordered valves for a gasoline (high compression) head? Or the fact that these engines haven't been made now for 40+ years and it's only available in the longest length with the expectation the they would be ground by the machine shop?

Forgot to mention earlier - Glyptal paint on the inside of the block looks good too.

Thanks for the piston info.

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williamf

05-09-2002 21:46:33




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
Those sure are some beautiful parts, all clean and new and shiny. I wish I thought for one minute that the prev. o. who rebuilt Mr.Haney did even nearly so good a job.



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sod

05-09-2002 21:20:01




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
Looks like nice work. I wouldn't hesitate to buy a used tractor from you.
sod



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LOU

05-09-2002 20:36:43




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 Re: 42 Farmall H progress report.... in reply to Steven@nd, 05-09-2002 20:29:52  
Steven, you may have done this but, visually determine top dead center while the head is off, and check for marks. My H runs great, but I can't get the timing marks right. Just my .02 cents.



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Steven@nd

05-09-2002 20:46:20




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 Re: Re: 42 Farmall H progress report.... in reply to LOU, 05-09-2002 20:36:43  
Thanks for the advice, Lou. I can see the piston tops through the spark plug holes on mine. Gotta love those step-head pistons! Timing marks line up perfect on crank, cam, and magneto gear also.

Steven



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