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Farmall & IHC Tractors Discussion Forum
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SC Crankshaft Pulley

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skycarp

04-02-2007 19:12:23




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Hi all,

My front crankshaft pulley is deeply grooved in the area where the oil seal rides, and the previous owner broke the pulley and welded it back. I want to replace it.

The part number in the Super C parts manual lists the crankshaft pulley as part # 6 502 DB. The Tisco catalog lists a crankshaft pulley for theFarmall A, B, or C with a part # 6 502 DC.

Are these one and the same pulleys, or does the last letter in the part number, C, in the Tisco part number mean they are a different beast?

My mind says there is some difference. If so, will the Tisco pulley work without problems?

If they will not interchange, is there a good source for the new SC pulley?

Thanks in advance for all your help with this restore project.

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El Toro

04-03-2007 09:25:06




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 Re: SC Crankshaft Pulley in reply to skycarp, 04-02-2007 19:12:23  
Heat the pulley in an oven to about 200 degrees, by the time you have it installed it won't be any hotter than the engine on a 90 degree day. Keep the bolts loose in the timing gear cover until you have the damper installed. Hal



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teddy52food

04-03-2007 05:46:59




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 Re: SC Crankshaft Pulley in reply to skycarp, 04-02-2007 19:12:23  
If you look at the bolt holes that hold the front end on, there are 2 that are in line with the center of the pulley. I use 2 threaded rods & a plate to install the pulley cold.



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Keith-OR

04-03-2007 09:33:59




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 Re: SC Crankshaft Pulley in reply to teddy52food, 04-03-2007 05:46:59  
Here here teddy, seems like I posted a picture of the puller and square tube I used to remove AND install pulley back on the crank awhile back.

The holes are 11 3/4 center to center, I used 5/8 althread 24 inches long. Used hydraulic jack with a 1/2" by 2 1/2" diameter plate against the pulley.

Caustion!!! be sure to leave the front housing loose, so the seal will center properly on the pulley...

Keith & Shawn

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Cedric

04-03-2007 02:40:36




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 Re: SC Crankshaft Pulley in reply to skycarp, 04-02-2007 19:12:23  
The end of the crankshaft is tapped ½" N.C. If you screw a piece of threaded rod into it long enough to pass through the pulley and a piece of heavy plate to cover the face of the pulley, and a nut, you can force it on by winding on the nut. That is the way I replaced the pulley on my Super C a few months ago. Warm the pulley up but nowhere near red heat. Sid.



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glennster

04-03-2007 05:46:59




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 Re: SC Crankshaft Pulley in reply to Cedric, 04-03-2007 02:40:36  
best way i found to heat up the pulley to install it is to use one of those presto fry daddy deep fryers. you can use regular cooking oil or mineral oil, drop the pulley in the fryer, let it heat up, pack the front seal good with grease, then install it using a bolt to pull it on. works good and doesnt overheat the pulley.



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Marv

04-02-2007 20:46:01




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 Re: SC Crankshaft Pulley in reply to skycarp, 04-02-2007 19:12:23  
Skycrap,I've considered your recommendation to heat the pulley. However, my local CaseIH service manager does not recommend it. He said the heat will ruin the crank seal. The leaking seal is the reason I pulled (and broke) the pulley in the first place. Marv



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georgeky

04-03-2007 05:37:06




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 Re: SC Crankshaft Pulley in reply to Marv, 04-02-2007 20:46:01  
Marv every old IH dealor I ever went in had a oven in the shop just for heating those pulley's. If heated in a oven it will not get hot enough to hurt the seal at all. There will be a lot less danger of breaking an other pulley. I have insalled dozens of them this way and never a problem with melted seals. Put the pulley on the oven rack and turn on oven any where between 300 and 400 degrees and heat about an hour then slide it on. You have to do it quick as the pulley cools down enough in only a minute or so and will not go on. The first one I installed, I drove it on with a hammer and block of oak, thought it worked fine until a year later while cultivating tobacco the crank just gave out. After removing it was obvious that it was broken half way across for a while. I suppose I cracked the crank with the severe hammering it took to drive the pully on. I learned this oven trick from a IH mechanic that worked on Farmalls for 47 years.

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Marv

04-02-2007 20:13:26




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 Re: SC Crankshaft Pulley in reply to skycarp, 04-02-2007 19:12:23  
I purchased a recently front cover gasket from CaseIH. Marv



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skycarp

04-02-2007 20:21:03




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 Re: SC Crankshaft Pulley in reply to Marv, 04-02-2007 20:13:26  
Thank Marv,

Good information for me in both of your posts.



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Keith-OR

04-03-2007 01:52:07




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 Re: SC Crankshaft Pulley in reply to Marv, 04-02-2007 20:11:00  
I guess I'm at a loss here, why would anyone beat the pulley back on and take the risk of damaging the thrust bearing on the crankshaft. Everytime you hit the pulley you are driving the crankshaft back against your thrust bearing. Or heating it up and taking a chance of destorying the front seal. When it is a simple matter of making a jig to press the pulley back on with a hydraulic jack!!!

No disrespect intended to anyone...just my 2 cents

Keith & Shawn

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skycarp

04-02-2007 20:32:15




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 Crankshaft Pulley Install in reply to Marv, 04-02-2007 20:11:00  
Marv,

I haven't tried it with a pulley, but with a flywheel ring gear, you only have to heat it to below red temperature and it will fall on the flywheel. Try removing the pulley, heating it to just below red and see if you can drive it on with a block of wood and a hammer. Crank should be cold, pulley hot for this to work.

Let me know if this works, as I am going to have to go there soon.

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georgeky

04-02-2007 20:48:40




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 Re: Crankshaft Pulley Install in reply to skycarp, 04-02-2007 20:32:15  
I wouldn't beat on that pulley with a hammer. This can result in damage to the crankshaft, Just heat it in a oven and it will slide right on with very little tapping.



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riverbend

04-02-2007 19:22:58




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 Re: SC Crankshaft Pulley in reply to skycarp, 04-02-2007 19:12:23  
As I understand it, when IH made a small change they went from B to C. If it was a big change, they changed the whole part number. So, the TISCO pulley should work. If you can get one of their reps on the phone, some of them are pretty good.

Greg



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skycarp

04-02-2007 20:09:18




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 Thanks, Now I Need a front cover gasket in reply to riverbend, 04-02-2007 19:22:58  
Thanks Greg,

I will call Tisco Tech Support tomorrow.

Next problem, I have the front cover off to change the crankshaft pulley seal. I can not find a source for the gasket for the front cover. this is a large and thick gasket if the old one is representative. I couldn't save it as the previous owner used some kind of glue to install it.

Carter and Greunwald list it as not available. Do you or anyone else know of a source for this gasket?

Thanks,

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leon

04-03-2007 04:40:23




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 Re: Thanks, Now I Need a front cover gasket in reply to skycarp, 04-02-2007 20:09:18  
I got mine at the local C-IH Dealer not too long ago



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