small one wire alternator replacement for original AC dyno

kaze

Member
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

Active member
Jul 21, 2022
291
167
43
USA
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.
 
  • Like
Reactions: 1 user

GreensvilleJay

Well-known member

Equipment
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
11,421
4,908
113
Greensville,Ontario,Canada
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.
 
  • Like
Reactions: 1 user

N3BP

Active member

Equipment
B7200DT, B7200HST-D, L2900GST, L3010 HST TLB
Sep 20, 2016
471
197
43
Lebanon, PA
The Denso is a good choice. I've been running one for a few years now and it's been great.....
 

Attachments

Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
5,235
1,018
113
Williamstown Ontario Canada
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
 

Attachments

Last edited: