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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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E-4 alternator

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Bacman48

04-18-2007 08:04:46




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I am changing the E-4 Coop to a 12 volt system and am putting a GM alternator on it. Is there a wide alternator pulley available or another way to do this? Thanks for the help.




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Bob

04-18-2007 08:19:54




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 Re: E-4 alternator in reply to Bacman48, 04-18-2007 08:04:46  
A local alternator shop SHOULD have access to a wider pulley.

Also, the pulley off of the old generator (especially if it's a Delco) will often fit the alternator. The generator shaft and pulley will have keyways, the alternator shaft won't.

The generator pulley will be larger than what is desired for alternator use. However, if you are using an "as-original" "3-wire" alternator, it will likely be OK.

The (goofy) "one-wire" aftermarket abomination alternators need a SMALL pulley to spin fast enough to "excite".

Here's how to connect up a "3-wire" unit. A # 194 lamp "idiot light" can be used in place of the diode. Use one OR the other.

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