Hatachi 12 v. Conversion failure

47fivewindow · Jan 31, 2021

It was recommended here that Hatachi alternator 14231 was a good fit and a. 3 wire hook up. I ordered one for a Cub on line about $38.00 bucks. It would bury the amp meter at full rpms. It was charging at almost 17 volts. I called tech support and was told I needed a regulator for it to work. I gave up and installed a Delco. It is a tight fit but is under the hood. Has anyone had success with the Hatichi?

David G · Jan 31, 2021

I have one on my H, not sure of the model.

Eagle Beagle · Jan 31, 2021

There is a built in regulator and a resister to keep the battery from feeding back to the alternator.

The alternator is a three (3) wire set up which can be converted to one (1) wire. There are spade connections labeled S & L and a BAT post connection. The L spade is for the idiot light and can be disregarded. Use a jumper wire from the S spade to the BAT post and you are good to go.

I've used this setup several times in the past. On a rebuilt, maybr you just got a wonky regulator. Mine were all from NAPA, not that it matters.

Beagle

rvirgil_KS · Jan 31, 2021

The Hitachi alternator should have the regulator built in.

You have the green and Black wires reversed on the edge plug on the Delco in the picture. If they were reversed on the Hitachi that might have contributed to faulty operation

J Hamilton · Jan 31, 2021

I use a mini denso for all the 12v conversions that I do, and use the 3 wire hookup. They seem to work very well. Rated at 63 amp, ordered them online for about $40 each, no core charge.

Eagle Beagle · Jan 31, 2021

Yup, always battery post to the #2! Sharp eyes there.

Beagle

Eagle Beagle · Jan 31, 2021

Do you have the diode installed on that Delco?

Beagle

47fivewindow · Jan 31, 2021

"Yup It was backwards when I took the picture. It did not shut off. The Diode is under the wire wrap. Thanks for pointing it out before someone tried to copy it.

47fivewindow · Jan 31, 2021

Maybe I got the first bad part from China we have heard of. And their tech guy was misinformed.

DeltaSteve · Jan 31, 2021

I've done a dozen or so Delco one wire conversions.The first almost 20 years ago.Excedingly simple to hookup. All have worked perfectly.I will never understand why folks insist on still useing the 'old' 3 wire systems.

Steve@Advance · Jan 31, 2021

I put a Hitachi on a forklift once.

It was the only one I could find small enough to fit.

This one had the power steering pump on back of the generator, so the generator had to stay, and the alternator went beside it. Very tight quarters!

It worked, but had to be revved to full governed speed to initiate the charge. Never understood why, it was the correct pulley ratio.

KCTractors · Jan 31, 2021

That is all I use now are the Hitachi 14231 alternators. I think they look much better for a 12 volt conversion and use use all 3-wire with a diode.
I just put one on my Case 311 and used the same mounts and had to get the wider pulley.
I wish I could them with a tach-drive for the Ford thousand series tractors.

gene bender · Jan 31, 2021

I use them because they are small and fit without body work have no problems maybe yours charged that much cause the batt was down

Hatachi 12 v. Conversion failure

47fivewindow

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David G

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Eagle Beagle

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rvirgil_KS

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J Hamilton

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Eagle Beagle

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Eagle Beagle

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47fivewindow

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47fivewindow

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DeltaSteve

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Steve@Advance

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KCTractors

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gene bender

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