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Farmall & IHC Tractors Discussion Forum
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Belt pulley gearbox gasket

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Scott Rukke

10-25-2007 16:50:14




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Does the belt pulley gearbox take a gasket or shims. I was recently told a gasket but an older forum on here states it takes shims and no gasket and that the shims are used to get the proper mesh on the gears. If it's a gasket where are they available? Part #? Thanks




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Wayne in MN

10-25-2007 20:51:23




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 Re: Belt pulley gearbox gasket-long in reply to Scott Rukke, 10-25-2007 16:50:14  
H gasket is paper only.
Be sure to put sealant under the 2 long bolt heads AND put the bolts in the gearbox BEFORE sliding the pulley drive under the gas tank. BTDT!
Need to rebuild it? here are some instructions.
My 2 sons & I just re-did 2 gearcases for their belt pulleys on their "H"s".
Remove the capscrews under the pulley mounting flange and the shaft, spacers, & bevel gear will all slide out with a bit of assistance.
Remove the cap screw on the end of the shaft and all the parts can be pulled off.
I was able to obtain replacement bearings at no cost by going to an electric motor rebuilding shop. If my memory is correct you need a 6210 & 6208 bearing for the drive shaft. Remove any shields so the bearing will now lube itself from the transmission oil. Thoroughly clean all old grease residue before installing the used bearing. Factory bearings run $50 or so for the big one so it can be an expensive affair to replace them. NAPA wanted $45 for the 6210 size.
I have a Case/IH dealer in town (Fergus Falls, MN) so obtained the new seal, felt dust washer, and mounting gasket from them at a very reasonable cost.
Carefully clean the metal spacers and put a VERY light coating of silicone on them just before assembly. Don't mix up the cap screws from the drive gear cover with the shaft cover; they are longer (don't ask how I found out) and will not compress the spacers under the pulley flange.
On the drive gear shaft, just remove the 3 cap screws and pull the unit out. Remove 2 fine threaded cap screws & take the bevel gear & bearing off. It is a 6206 size. Watch out for the shift lever plunger & spring as they will jump out if the lever is moved too far. And this will happen as you clean the gear-case. If you need to replace the steel plug in the back of the gear-case, IH doesn't have it any more. Go to an automotive parts rebuilder and get a 1 3/16" soft plug; it can be deeper (longer) than original. Put the spring & plunger back in place, set the large drive gear on the shift lever. Clean & lightly silicone the spacers and reassemble. The 2 long bolts had copper washers but a dab of silicone will work. Be sure to put them in place in the gearcase BEFORE you slip it into place on the tractor. They won't go in later unless you remove the gas tank or pull the gear-case back out. (I know, experience is a great teacher)
It goes without saying to carefully scrape all old gasket residue off before reassembly. Careful use of a 10" or 12" mill file will do wonders. Use it as a draw file ( sideways motion, not forward & back) to locate any high spots on the metal casting also.
I now have 2 belt pulley gear-cases that work just like new at a very minimal cost. Sorry for the long post, I was a Vocational Engines instructor in my past life and just can't quit teaching!!
Good luck.

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Bob Kerr

10-25-2007 20:02:00




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
I just bought one this spring from caseIH. It was a metal gasket covered with a rubber like coating. Sorry I don"t have the part number right now, my books aren"t here.



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Roger46

10-25-2007 19:17:45




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
It appears you are talking about the output shaft of the belt pulley. As someone said below, the flange has shims on it to set the bevel gears engagement/backlash. If you do put a gasket in with the shims it will change the alignment and cause excess wear of the bevel gears. I have had problems with the shims leaking in the past. Someone posted a reply in the past saying that it is critical to get the shims clean including removing all rust. That way they seal the best. Also, I have coated each shim with a very thin layer of nonhardening gasket cement and that prevents leakage. Another point, if you put in a gasket it will not prevent leakage as oil can leak out between each shim. Roger

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ScottyHOMEy

10-25-2007 19:29:09




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 Re: Belt pulley gearbox gasket in reply to Roger46, 10-25-2007 19:17:45  
Roger, could you ping me at skt4 at Columbia dot edu ?

I'm interested in what you said about sealing between shims. Got a persistent problem here with a leak at the right-side bearing where the shaft passes out of the tranny on my BN. New double seals and it still leaks. I'm thinkin' you might have my answer.

Thanks!



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Dave BN RE your BN seals

10-25-2007 20:08:49




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 Re: Belt pulley gearbox gasket in reply to ScottyHOMEy, 10-25-2007 19:29:09  
If your differental shaft is worn where the lip of the seal rides on it it will leak no matter how many you put in. If this is the case you need a speedy sleve. Or maybe your puting the seals in backwards. Or maybe it's leaking where the seal fits into the housing not around the shaft. Or maybe your filling the transmission to full(1 1/2 gal I think, 90w or heaver. I've done a few of these with success. E-mail me if you need more help. Dave.

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ScottyHOMEy

10-25-2007 20:48:47




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 Re: Belt pulley gearbox gasket in reply to Dave BN RE your BN seals, 10-25-2007 20:08:49  
Thanks, Dave, for chiming in. This is the last leak on my BN and it's running me nuts.

My BN (a family tractor that got out of the family for a few years . . .) needed just about every bearing and seal replaced. This is the one I couldn't get apart. The left side was fine, but I couldn't get the bearing cage out of the right side without breaking something. I've gone at it twice. No idea what's gong on there. She'll come away, but she won't come out. That bearing is the noisiest thing on the tractor, so it needs to be replaced, but I'm about out of ideas about how to get at it. I can't imagine that bearing cage will be an easy thing to replace if I bust it.

I thought about having the tranny overfilled, but I cleaned it out pretty well when I had her torn down, and only refilled (tranny first, PTO after) until the drain plug wept.

With the double seals, I thought I might be off the worn spot on the shaft, but she still leaks just sittin' still, and was hopin' that somehow getting a sealant in between the shims might be the answer.

But I'm open to any ideas!!! I have lookd into the speedy sleeves. As clean as the shaft is, I'm not sure they'll be the answer, and I can't rule them out before I'm done.

But I still need to get into that bearing. Grrrrr. 8^(

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Roger46

10-26-2007 19:55:20




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 Re: Belt pulley gearbox gasket in reply to ScottyHOMEy, 10-25-2007 20:48:47  
Scotty, You can certainly get leakage past the shims on the BN transmission bearing cage and not the seals especially since you have had the bearing cage loose. That bearing cage should come right out as it is just held on with three or four bolts. Are you sure you are pulling it out perfectly straight? Make sure the gap is the same all around as you pull it out. Another problem may be if that bearing is really bad, it may have spun on the shaft and gauled the surface. If that is the case you may have a real hard time getting it out. This may be why the cage only comes out a little (until the ring and pinion gear bottom out). As a side note, a real down side of breaking the bearing cage is that you will have to realign the ring and pinion gear, which is not an easy procedure. If you do get it out, I suggest you coat the shims with a light coating of gasket cement. Good luck. Roger

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Scott Rukke

10-25-2007 19:27:48




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 Re: Belt pulley gearbox gasket in reply to Roger46, 10-25-2007 19:17:45  
Actually I was talking about the gearbox to the tractor not the output shaft. Sorry I didn't make that clear.



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Dave BN

10-25-2007 19:14:13




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
Scott, do you know how to make a gasket? If not, e-mail me and I will call you or e-mail you the easy way to make any gasket(no, not that liquid crap) Dave.



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F-Dean

10-26-2007 11:14:56




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 Re: Belt pulley gearbox gasket in reply to Dave BN, 10-25-2007 19:14:13  
You should post your method for some who may not know how. I often make a gasket (with a small ball-peen hammer) rather than drive 20 miles to find out the IH dealer does not have THAT gasket.



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Scott Rukke

10-25-2007 19:28:54




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 Re: Belt pulley gearbox gasket in reply to Dave BN, 10-25-2007 19:14:13  
I can make one no problem. I was worried about thickness though. Is cork OK?



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CNKS

10-25-2007 19:07:19




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
The entire unit has a gasket below it. You have to make it yourself as it is NLA from Case-IH. Any shims are inside the unit.



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ejr-IA

10-25-2007 19:06:06




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
Case IH dealer gasket no. 49619DA



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ScottyHOMEy

10-25-2007 18:55:30




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
There are shims in there, Scott. You'll find them in about any set-up involving beveled gears.

My I&T manual shows a seal in a bearing cage, with a felt washer outside that. They don't show a gasket, but then they skip a lot of parts and, in that regard, aren't as detailed as the parts manual for a given tractor. A paper gasket on the very outside might make sense but isn't a given. Terry says they have one, so that's a starting point. If there is supposed to be one, I wouldn't be surprised to find Case IH still carries it.

Maybe somebody with an H parts manual can look it up and chime in.

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tn terry t

10-25-2007 18:03:40




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
mine had a gasket no shims my brother-in-laws also has a gasket



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Dave BN

10-25-2007 17:40:47




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 16:50:14  
What model tractor Scott?



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Scott Rukke

10-25-2007 17:42:33




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 Re: Belt pulley gearbox gasket in reply to Dave BN, 10-25-2007 17:40:47  
It's a Farmall H. Sorry.



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Dave BN

10-25-2007 18:33:48




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 Re: Belt pulley gearbox gasket in reply to Scott Rukke, 10-25-2007 17:42:33  
Not sure about the H but A's and B's have shims to adjust the clearence in the bevel gears. Dave



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