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Implement Alley Discussion Forum

Wedge pins. Some trick to it?

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Chip S.

06-17-2004 15:53:32




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The gearbox drive sprocket and sprocket on the top roller of my 469 don't line up. Chain goes cocked over the idler. Looks like the sprocket on the roller is the easiest to get to, but it's held in there with a wedge pin. Before I go busting something, what's the proper way to get this thing loose?
Thanks.




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charlie

06-18-2004 04:42:26




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 Re: Wedge pins. Some trick to it? in reply to Chip S., 06-17-2004 15:53:32  
Sounds like you are describing a Gibbs Key.To remove it just hit the tab on the end with a small chisel and it should come right out.



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Ol Chief

06-17-2004 20:27:30




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 Re: Wedge pins. Some trick to it? in reply to Chip S., 06-17-2004 15:53:32  
Not familiar with terminology, ( wedge pin ). Can you describe this part. Maybe we can help.



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ChipS.

06-18-2004 04:28:30




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 Re: Re: Wedge pins. Some trick to it? in reply to Ol Chief , 06-17-2004 20:27:30  
It looks as if the sprocket is held on the shaft by a wedge-shaped or tapered key that is driven into keyways cut into the shaft and the bore of the sprocket. About 1/2" of the key protrudes out from the end of the shaft. It looks to have a little tab or lip on the protruding end. Several of the sprockets and pulleys on the haybine are affixed in this manner.



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Leroy

06-18-2004 05:22:43




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 Re: Re: Re: Wedge pins. Some trick to it? in reply to ChipS., 06-18-2004 04:28:30  
I have that on a McCormick 55 year old hay rake that I have to get apart but no room to drive gear in and rusted tight



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Harold Hubbard

06-18-2004 04:39:13




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 Re: Re: Re: Wedge pins. Some trick to it? in reply to ChipS., 06-18-2004 04:28:30  
The "wedge pin" is called a gib-head key. Get a piece of iron pipe that will fit over the shaft and leave room for the head of the key, or cut a slot for the key to fit through. Use the pipe and a hammer to drive the sprocket a little bit further on to the shaft, this will slide it off the taper of the key, loosening it enough so that you can put a prybar behind the head and slide it out, a pair of thin wedges driven behind the head from opposite sides also works. Some PBlaster or Liquid Wrench will help if it's really tight. Some times you also have to heat them. If you can find a manual for a Hesston mower (PT-7, PT-10, 1091) it gives these instructions, with a couple of illustrations.

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Ol Chief

06-18-2004 19:55:38




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 Re: Re: Re: Re: Wedge pins. Some trick to it? in reply to Harold Hubbard, 06-18-2004 04:39:13  
No need for me to comment.You have the correct answers from Charlie and Harold.



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