Alternator and regulator question - Siromer 304 / Jinma 254

2Old2Worry

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Jul 17, 2021
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Jinma 254
Two years ago, I replaced the OEM alternator/regulator with a single wire GM self exiting alternator, that puts out 60 amps, for only $60. I have been running this alternator for a couple of years now and haven't looked back! It took a lot of research at the time to find out what to upgrade to but this was the simplest one and I wanted to upgrade it and eliminate the need for an external regulator. I just had to get a different length belt also. That was easy enough to find at my local Tractor Supply for I think $6. Go to dbelectrical.com and search this: Alternator 1 Wire Universal Self-Excited 10SI 10 SI 7127-SE. I tried posting the link but I do not have permission because I have not met the required 3 posts in order to do so.
TimP82
I have a Jinma 254. I want to replace the factory alternator with the delco 10si since wire alternator. What do I do with the other 3 wires connected to the alternator? I realize one has to be to the external voltage regulator. What do I do with that? Thank you for any help. I got the part on the different pulley.
 

2Old2Worry

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Jinma 254
Dear Bob,
I want to replace the alternator on my Jinma 254 with the Delco 10si single wire internal regulator. What do I so with the other 3 wires? Thank you for any help
 

Bob Rooks

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Yuchai dozer, Mitsubishi mini-ex, Mustang skid steer, Deere X350, DR Power Wagon, Dirty Hands tracked power cart.
Dear Bob,
I want to replace the alternator on my Jinma 254 with the Delco 10si single wire internal regulator. What do I so with the other 3 wires? Thank you for any help
What is the amperage rating of the new alternator? You may have to change out some wires anyway.
 

2Old2Worry

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Jinma 254
Bob, according to the web site the amperage for the Delco 10si is 63 amps
 

Bob Rooks

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Silverdale & Bothell, WA
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Yuchai dozer, Mitsubishi mini-ex, Mustang skid steer, Deere X350, DR Power Wagon, Dirty Hands tracked power cart.
Bob, according to the web site the amperage for the Delco 10si is 63 amps
I believe your existing alternator is rated nominally at 14 amps, and your output wire is only AWG 14 equivalent, which will need to be replaced with AWG 10 (as well as the ground wire). You will also need to get the smallest pulley you can for your belt width. So, about those extra wires - just tape them all off because you won't be using any of them.
 

2Old2Worry

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Jinma 254
Bob,
I contacted the dealer I purchased the tractor from and asked them the correct wiring for the alternator. You were correct, he had wired it wrong. All three of the smaller wires were on the wrong posts. I put them on the correct posts and it works. No light after starting and I am getting 14.4 amps at high idle. Thank you for the suggestion.
 

2Old2Worry

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Jinma 254
When this one goes I am going with the Delco. For sure! I will get the smaller pully and upgrade the wire gauge to the 10. That all makes perfect sense. Thank you.
 
 
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