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Old May 3, 2007 | 10:15 AM
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k-oss's Avatar
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Onan

I picked up an Onan L634 Diesel generator for a song. Onan is actually manufactured by Cummins. If any of you have any info regarding this power plant as well as a possible source for parts it would be greatly appreciated. It needs a radiator and fan. The folks on this forum are amazing but I'll be real impressed if anyone nails this one!!!
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Old May 3, 2007 | 11:55 AM
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The local Cummins dealer in town here sells parts. Try here http://www.funroads.com/onanstore/ossearchStart.jhtml
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Old May 3, 2007 | 12:13 PM
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Onan

Thanks for the link Berner.....however, this site is for RV generators. Mine is a large 25KW three phase back up unit. Thanks again.
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Old May 3, 2007 | 02:06 PM
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Does it have a 4bt cummins in it?
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Old May 3, 2007 | 10:22 PM
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Any of the larger Cummins dealers will either have the parts, or can get em for you.
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Old May 4, 2007 | 03:52 AM
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This is a link to a generator forum I am also on.
There are a few Onan techs onboard.
Jim
http://www.smokstak.com/forum/forumdisplay.php?f=6
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Old May 4, 2007 | 07:26 AM
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Originally Posted by k-oss
Thanks for the link Berner.....however, this site is for RV generators. Mine is a large 25KW three phase back up unit. Thanks again.
That link will take you to a Cummins dealer locater. We use Cummins-Onan emergency gensets at our remote uranium mine up north. We deal with the Cummins dealer.

Is it in fact a Cummins engine or a Mits in your unit?
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Old May 4, 2007 | 08:25 AM
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....once again, you guys are amazing. Thanks for the info. Yeah berner, my research from Onan and Cummins on the web indicates this is a Cummins power plant. It's a small inline six. Onan claims these engines are now what are called the Cummins A-series. ratat98...not sure what a 4bt is. I've seen that refered to on this forum before. Just not sure what that means. Jim Lane, thanks for the link.....I'll check it out.
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