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Discussion Forum

Removing Crankshaft Fan Drive Pulley on Model C

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01-12-2003 18:13:56

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I have been trying to remove the crankshaft pulley from the crankshaft. I have removed the screw behind the pulley, but can't seem to break the pulley loose. I am using a gear puller and have sprayed Liquid Wrench liberally around the shaft. I also have tried heating the pulley to no avail. I am afraid that I may bend the pulley so I haven't torqued tremendously hard, but have put a fair amount of force to it.

This shouldn't be rocket science. Am I removing this the proper way? Will I bend or break the pulley if I crank on the gear puller? Any other suggestions?

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Phil auten (TX)

01-13-2003 16:09:58

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 Re: Removing Crankshaft Fan Drive Pulley on Model C in reply to Mike, 01-12-2003 18:13:56  
Go to a Wal-Mart and get a couple of spray cans of PB Blaster. This is the best penetrant I have ever used. It seems to dissolve rust, even between tightly fitting parts. Let it soak for a couple of days, spraying it twice a day. Now apply the heat, and use an Acetelyene torch. Forget about Propane torches, not enough BTUs in there. If you don't have an Acetelyene torch, go to a plumbing supply store and get a cylinder of Mapp gas for your propane torch. It works almost as well as Acetelyene.
Be sure to follow the advice about how to use the puller, they are right about breaking the pulley. Don't ask me how I know. :o(


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01-14-2003 21:15:19

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 Re: Re: Removing Crankshaft Fan Drive Pulley on Model C in reply to Phil auten (TX), 01-13-2003 16:09:58  
Phil (and others):

Thanks for your input. Unfortunately I did crack the pulley and still don't have it off. Assuming I get it removed in once piece, I am hoping to still be able to use it as the crack is only a couple inches long and the pulley is not distorted.

Nevertheless, I am interested in any leads you can give me to replacing it. Also I would be interested in what I should pay for such an item if you have an idea. Thanks. Mike

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Dick L

01-13-2003 11:15:26

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 Re: Removing Crankshaft Fan Drive Pulley on Model C in reply to Mike, 01-12-2003 18:13:56  
For the really tough ones, take a piece of 1/4" plate steel and cut a circle from it as large as the pully. Slot the center so it will slide over the inside hub that the setscrew is located. You can then apply more pressure with a puller without breaking the pully. As stated before, you need not worry about bending the pully, it will break very easy. I also use a lot of heat on the hub on the really tough ones.

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01-12-2003 20:00:36

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 Re: Removing Crankshaft Fan Drive Pulley on Model C in reply to Mike, 01-12-2003 18:13:56  
if u have the locknut loose and the screw backed clear out u should be able to pull it but u might have to get it pretty hot with a torch but be damn careful how much pressure u put on the pully. it is a cast pully and will break pretty easy i would reccomend that u get get some one with some experience to show u how it is done the first time

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David Maddux

01-13-2003 04:54:59

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 Re: Re: Removing Crankshaft Fan Drive Pulley on Model C in reply to rudy, 01-12-2003 20:00:36  
I have had some pretty tough ones too, When I get all the pressure I think the pully will take, I hit the center of the pully with a hammer. Then try to put some more turns on the puller. If it turns easier, turn it til it gets tight again and hit it again, while still bathing it inWD40. It takes a while but has always worked. Dave

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