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Farmall & IHC Tractors Discussion Forum
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Different crank seal question

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Roger Mills

03-26-2007 15:30:23




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I saw the post on the H front crank seal and I am about to do one on an A. I already know how tough it can be to get the pulley off and think I can handle that part OK. The seal and how to put it in is the question. The front cover plate appears to have a lip around the outside of where the seal goes. So-do you just wiggle it in around the crankshaft?? Any tips or suggestions on the easiest way to do it without harming the seal would be greatly appreciated. By the way, I noticed that the lip is very slightly crooked, round but at a slight angle compared to the back step on the pulley-I don't think it should be that way and wonder if anyone has dealt with that. This thing doesn't just seep oil, it slings it-1/2 cup in about an hour. I think the crooked lip has the seal at an angle and its not sealing at all. I just hope I don't have to pull the front cover.

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Roger Mills

03-27-2007 07:55:21




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 Re: Different crank seal question in reply to Roger Mills, 03-26-2007 15:30:23  
Thanks CSR, I appreciate the details, but, its not what I WANTED to hear. It means I have to pull the whole front end off the tractor and there goes the new paint. Is the lock screw on the side of the pulley hub in a dimple or what?? BTW what is a good way to support the engine end without denting the pan?? As for pix, I will try to get my computer hooked up with to my wifes digital camera, no promises on that yet.

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CSR

03-27-2007 03:41:23




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 Re: Different crank seal question in reply to Roger Mills, 03-26-2007 15:30:23  
You have to remove the timing cover because the seal goes in from the rear. I just started all the bolts, figured I'd finish running them in after the pulley was installed and concentric with the crank seal, but I couldn't shift the cover around before I installed so the pulley, so I just tightened the cover. My pulley ID measured about .002 smaller than the crank. I gave it a light flapper wheel, then heated the pulley to 300F for 3 hours. At 1.25 in diameter (going from memory), a change in steel temperature of 230F (300F-70F) will change the diameter .0018 which reduced the interference fit from .002 Tight to .0002 Tight. A light tap with a block of wood and a hammer and it slid right on. I then started cooling the pulley immediately by wrapping a water soaked rag around it (next to the seal) till the rag smoked, then I'd resoak and do it again. I lubed the crank up good with oil before I started and made sure I put some camshaft assy lube on the seal also. Most silicone rubber products are advertised as good to 500F so I felt 300F was OK, plus the wet rag pulled the heat from the pulley rather than have it heat soak the seal.

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banjo

03-26-2007 21:13:39




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 Re: Different crank seal question in reply to Roger Mills, 03-26-2007 15:30:23  
If my memory hasn't failed me i think you have to pull the front cover as the seal goes in from the back side. I could be wrong , but i think that is the way my super A was.



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El Toro

03-26-2007 18:57:16




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 Re: Different crank seal question in reply to Roger Mills, 03-26-2007 15:30:23  
third party image

You don't want to pull from the outer edges of the pulley. It would be better to make a puller
like Bigdog made for his Cub using a hydraulic jack or ram. Hal



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Tom Windsor

03-26-2007 17:26:07




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 Re: Different crank seal question in reply to Roger Mills, 03-26-2007 15:30:23  
Roger

I would like to see what you are talking about. Is it possible to post a picture.

TW

PS

Be awful careful with the pulley...don't start banging it with a hammer as I did and break it. Fortunately, I had 2 or 3 other pulleys lying around here.



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El Toro

03-26-2007 16:41:06




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 Re: Different crank seal question in reply to Roger Mills, 03-26-2007 15:30:23  
Your pulley may have a groove worn into pulley's hub from the old seal rubbing against it. It if
does you can install a speedi-sleeve to cover that area on the hub. I think a new seal comes with the kit. I would pull the cover too and install the seal. The manual recommends the bolts in the cover remain loose until the pulley is reinstalled so the hub will center itself in the seal. Put the pulley in an oven to heat it before installing. Hal

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Tom Windsor

03-26-2007 17:30:54




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 Re: Different crank seal question in reply to El Toro, 03-26-2007 16:41:06  
I don't know what a speedy sleeve is, where you get it and how to install it. Can you add some details about this item? This is a common problem and sounds like a wonderful solution.



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El Toro

03-27-2007 16:04:10




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 Re: Different crank seal question in reply to Tom Windsor, 03-26-2007 17:30:54  
third party image

This picture of a speedi-sleeve was from IH's service manual. You get an installation tool for installing these sleeves. Hal



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JayWalt

03-26-2007 19:08:41




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 Re: Different crank seal question in reply to Tom Windsor, 03-26-2007 17:30:54  
Tom. I've never used a speedi spleeve, but know people who have, and readabout them on the forum. As the name implies, its just a thin walled sleeve that covers the groove. They generally are very thin and dont require a different seal.

I've luckily never had to use one. Generally if like a harmonic balancer pulley on a car, or axle , or whaever on a car is grooved, I just make sure to not seat the new seal entirely in the bore or just offest it enough to not ride in the groove. Seems to work good on nonpressurized systems. heres a link about them...

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El Toro

03-26-2007 18:51:09




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 Re: Different crank seal question in reply to Tom Windsor, 03-26-2007 17:30:54  
These speedi-sleeves have been out for years. They were made by Chicago Rawhide and are sold in most NAPA stores. They come in a number of sizes to fit different shafts. I think Case/IH even
sell them. Just click on "Keyword" and type in
Chicago Rawhide speedi-sleeves and you can read about them.

They not only have them for farm tractor damper pulleys, but for the hydraulic pump shafts since they can become worn too from an old seal.

I think C/R was sold too. I see SKF has the sleeves too, not sure if they purchased C/R. It's a quick fix for an oil leak and doesn't require any machining. Hal

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Tom Windsor

03-26-2007 17:30:45




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 Re: Different crank seal question in reply to El Toro, 03-26-2007 16:41:06  
I don't know what a speedy sleeve is, where you get it and how to install it. Can you add some details about this item? This is a common problem and sounds like a wonderful solution.



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gene bender

03-27-2007 03:04:13




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 Re: Different crank seal question in reply to Tom Windsor, 03-26-2007 17:30:45  
They can be found at any parts store you just need the od of the part you are putting it on. You want to be sure it is long enough to cover the groove worn by the old seal. Thanks TOM for the payment glad the clip worked.



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