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Voltage Regulators for S/G Systems

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3 replies to this topic

#1 Amigatec OFFLINE  


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Posted December 29, 2011 - 08:02 PM

This is something I've wanted to post here for some time. We seem to have a few questions on Voltage regulator for Starter/Generator Systems.

First there are at least different types of VR for these systems.

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I will name these Type A, B, and C.

Here are Type A and Type B

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Notice where the rear Terminals are.

Type A is on the RIGHT Rear Corner.

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Type B is on the LEFT Rear Corner.

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This is important.

The Rear Terminal on Type A is marked GRD and is for Grounding the VR.

The Rear Ternimal on Type B is marked G and is for the GEN Connection.

Type A front Terminals are marked BAT, GEN, FLD.

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Type B front Terminals are marked L, BAT, FLD.

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The BAT Terminal goes to the Battery, the GEN Terminal goes to the G post on the S/G, the FLD Terminal goes to the F post on the S/G, and the L Terminal goes to Load.

Your Tractor may or may not use the L Terminal.

Type C has the same connections on the front but the GEN Terminal is on the Bottom.

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My Cub Cadet 129 was originally equipped with the Type A VR, but I am using the Type B instead.

Notice how I am not using the L Terminal and have connected the GEN to the rear Terminal.

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I hope this helps somebody. All 3 of these will work but they have to be wired correctly.
  • mikebramel, MH81, Alc and 6 others have said thanks



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Posted December 29, 2011 - 09:35 PM

I'm going to study this more and bookmark the page. That's right dandy info. Thanks.

#3 KennyP OFFLINE  



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Posted December 30, 2011 - 03:38 AM

That could clear up some folks confusion.

#4 Michiganmobileman OFFLINE  


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Posted December 31, 2011 - 08:21 AM

Thanks for the info, you may have just prevented someone from installing one of these wrong and letting the smoke out of it!!:thumbs:

Edited by Michiganmobileman, December 31, 2011 - 08:22 AM.