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Farmall & IHC Tractors Discussion Forum
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Crankshaft Pully

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Gene37

10-23-2005 15:48:08




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We are taking apart our A engine and would like to know if the crank pully is a pull off or is attached by some other means?
Thanks
Gene




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George Willer

10-24-2005 07:26:02




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 Re: Crankshaft Pully in reply to Gene37, 10-23-2005 15:48:08  
It's just a tight fit and must be removed very carefully to prevent breaking the flange. There is an internal thread to insert a threaded rod so it can be PULLED on. This method will prevent damage to the crankshaft or thrust bearing. NEVER EVER pound on an engine!!! Not even if it belongs to someone else!!!



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El Toro

10-23-2005 18:26:37




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 Re: Crankshaft Pully in reply to Gene37, 10-23-2005 15:48:08  
If the area on the pulley hub has a groove from the oil seal rubbing on it, you need to install a speedi-sleeve and seal from Chicago/Rawhide to prevent oil leakage. Hal



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Wayne Swenson

10-23-2005 17:36:07




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 Re: Crankshaft Pully in reply to Gene37, 10-23-2005 15:48:08  
It is just an interference fit; a tight one at that!
Use a heavy duty bearing separator and 2-jaw heavy duty bearing puller. Since you are going to replace the seal, some heat from a torch will help loosen the cast pulley. It is brittle so be very careful; do not pull on the edges of the belt flange or breakage will occur.
When re-installing, be sure all rough edges are removed and the pulley keyway is aligned with the key on the crankshaft. Make a plate or find a heavy pipe so you can pound on the center of the pulley (see above paragraph concerning belt flanges). Heat the pulley to 200 degrees or so and it will go on rather easily. Pound until the pulley is fully installed on the crank. Did you remember to put some assembly lube on the inner edges of the oil seal? Dry seals and dry shafts make heat & wear when first starting the engine until oil is finally splashed around.

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El Toro

10-23-2005 16:45:05




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 Re: Crankshaft Pully in reply to Gene37, 10-23-2005 15:48:08  
There may be a cap screw in the center or a set screw. It may not have anything except the press fit on the crankshaft. You should use a split bearing separator behind the pulley to pull from. You can make a puller like this that was designed for the Cub pulley and use a hydraulic
jack. I would still use the separator too. Here's the web site for the puller. Hal

http://www.ytmag.com//farmall/messages/459316.html

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Andrew Z

10-23-2005 16:14:52




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 Re: Crankshaft Pully in reply to Gene37, 10-23-2005 15:48:08  
There should be some type of set screw on the side of the pully. May needed to help it off with a puller make sure to use a clamshell puller when pulling!
Andrew



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