small one wire alternator replacement for original AC dyno

kaze

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Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
Has anyone put a small one wire alternator on a B700 or B7100 to replace the original alternator?
If so a part number and information would be a great help in finding one that will fit and give at
least forty amps.
Thank you Joe
 

#40Fan

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Jul 21, 2022
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Are you good at fabricating? If so, find a GM single wire alternator at your local auto parts store and make a bracket to get it to fit.
 
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GreensvilleJay

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BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
Apr 2, 2019
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GM CS130 series might work , or DENSO unit. Be aware you'll probably have to change the pulley size, to get the correct RPMs on the alternator to function correctly.
I put the CS130 on my 4 big tractors, used 'idiot light' though.(simple). Not a fan of 'one wire' alternators due to their inherent design flaw.
 
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N3BP

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B7200DT, B7200HST-D, L2900GST, L3010 HST TLB
Sep 20, 2016
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Lebanon, PA
The Denso is a good choice. I've been running one for a few years now and it's been great.....
 

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Dave_eng

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M7040, Nuffield 465
Oct 6, 2012
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If you stick with DENSO you get a quality product. Even my friend's 2011 Buick Lucerrne has a DENSO from factory instead of a Delco.
Here is a link to a small form factor 45 amp unit on eBay.com. $118
Denso
In terms of mounting, the B7100 WSM available for free on Kubotabooks.com contains instructions for installing a higher output alternator than the OEM dynamo. I cut the section from the WSM and attached it to this post
Just ignore the wiring part of the installation.
Consider installing a volt meter so you can see that the new alternator is keeping up with your load
volt meter
Less than $10
What load are you adding to need so many amps?
Dave
 

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