Voltage Regulator

77 Ford · Post by **77 Ford** » Mon Jul 06, 2015 6:53 am

I think my Motorola voltage regulator has died. I have read several articles about converting to a 1 wire alt but what about just using a run of the mill voltage regulator?

I think the motorola one is about 150 bucks and a car one is less than 20 bucks. They have the same hook up field, stator, etc....

Any thoughts?

Post by **Lavoy** » Mon Jul 06, 2015 9:03 am

I would have to assume that the regulator is specific to the alternator it is running, so I tend to doubt that the "car" one would work, but who knows.
Lavoy

Stan Disbrow · Post by **Stan Disbrow** » Mon Jul 06, 2015 10:40 am

Hi,

A regulator has to be designed to match the impedance of the alternator field coil. If not, then it can easily not produce enough power, or, worse, produce too much. Go too far in the too much direction and everything burns out.

So, you can try the low cost option, and pay attention to the voltage produced with a meter and also how hot the regulator and alternator become. If the voltage is ok, and things don't overheat, you should be ok. If it starts going wrong, then the backup plan would be to buy the proper regulator.

Stan

DrLoch · Post by **DrLoch** » Tue Jul 07, 2015 6:51 am

I converted mine to a Delco 3 wire setup. The Deere alternator was fine, as in your case the regulator was bad and it cooked the battery. Got the alternator from autozone.

4430jd · Post by **4430jd** » Sun Jul 12, 2015 6:06 pm

I just had the voltage regulator replaced on my john deere 350 crawler/loader replaced. The new regulator is a Prestolite model #105-146. It is exactly like the original and cost to me was $39.00.

77 Ford · Post by **77 Ford** » Mon Jul 13, 2015 6:49 am

I ended up doing the alternator conversion I bought a 1 wire and it works great. I fixed the amp gauge so now I'll know if i'm not charging again. Thanks for the suggestions everyone.

jtb51b · Post by **jtb51b** » Thu Jul 30, 2015 1:15 pm

Sure wish I could find one of those prestolite 105-146's for $40.. I cant come up with anything that looks like it will fit for that.

jtrichard · Post by **jtrichard** » Sun Aug 02, 2015 12:15 pm

these may be what you need at least they crossed for me http://www.ebay.com/itm/Voltage-Regulat ... c5&vxp=mtr and http://www.aspwholesale.com/index.php?_ ... ct_id=2009

Crow Man · Post by **Crow Man** » Wed Jun 26, 2024 6:51 pm

Where is the voltage regulator located on a 1969 JD 350 dozer, I have looked all over and cant find what I see in pictures for the R2J1 voltage regulator, it has 4 wires according to replacement parts pictures. What I find that might be it has 6 wires. Could I possibly need a RS2J1 voltage regulator ?
serial number 109011T

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