|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
11-12-2022, 10:40 PM | #1 |
Senior Member
Join Date: May 2010
Location: Church Hill TN
Posts: 190
|
6 volt alternator problem
Me again guys I have a 6 volt positive ground alternator and I'm pretty sure it isn't working. Before letting the tudor sit for 5 years I can't get the alternator to work. I always had to Rev the engine up a little bit to excite the fields to show a positive change on my amp meter I have a reproduction 6v horn and it always sounded sick and would not aooga till I reved the engine up which would be correct for a self excited alternator. I think? But it started before I parked it not showing a output on amp meter. I have tried to excite the fields with a jumper wire but no go so I thick the alternator is dead in the water. Question is should I buy a rebuild kit that you can get for a 12v alternator that changes a 12v to a 6v positive ground since I already have a alternator already set up for the 6v positive ground or just buy another brand new 6v positive ground alternator that's good go? Is there anything else that the convertion partr not make it work again? Thanks Robert
|
11-12-2022, 11:47 PM | #2 |
Senior Member
Join Date: Jun 2017
Location: Walla Walla, WA
Posts: 1,047
|
Re: 6 volt alternator problem
You said you did try to excite the field, but not sure if this is the same: The single pole 6-volt alternators will loose their magnetic flux after sitting for a long period of time. Easy fix. If it is a Nu-Rex, there is a rubber plug covering two pins. With the car running, simply ground pin #1 for a second or so using some sort of jumper wire. That should restore its flux and as good as new. Probably any alternator using the S-10 knock-off alternator will do the same. Try that. Those were the instructions I got from Nu-Rex after I had mine sitting for a year being restored.
|
Sponsored Links (Register now to hide all advertisements) |
|
11-13-2022, 10:05 AM | #3 |
Senior Member
Join Date: Dec 2017
Location: Guthrie, OK
Posts: 1,155
|
Re: 6 volt alternator problem
Pin 1 is closer to the output post. Just place a small screwdriver blade between pin 1 and the housing (positive) for a second.
|
11-13-2022, 10:14 AM | #4 |
Senior Member
Join Date: May 2010
Location: Church Hill TN
Posts: 190
|
Re: 6 volt alternator problem
Thanks guys thats what I tried put a jumper wire from the first pin then to the housing for a little bit with engine running plus checked wires to make sure contacts were good but everything seemed to be OK it just didn't excite the magnetic field. After trying several times it never did show any difference on amp meter and also hooked a multmeter no difference car off or running showing 6.20 on meter. So not sure what to do. Robert
|
11-13-2022, 11:11 AM | #5 |
Senior Member
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,096
|
Re: 6 volt alternator problem
You could try a good jumper from battery + to the alternator case, may or may not help, but worth a try. I've heard that those alternators need to be well grounded.
__________________
If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn! Last edited by katy; 11-13-2022 at 11:12 AM. Reason: Addition |
11-13-2022, 05:06 PM | #6 |
Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,096
|
Re: 6 volt alternator problem
Sponsored Links (Register now to hide all advertisements)
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
11-14-2022, 08:55 AM | #7 |
Senior Member
Join Date: Dec 2017
Location: Guthrie, OK
Posts: 1,155
|
Re: 6 volt alternator problem
Those are hard to find these days. Too cheap to just swap it out (12V).
https://alternatorparts.com/6-volt-a...its-parts.html is a good source for diy or buy outright. Try replacing the regulator first. |
11-14-2022, 11:48 AM | #8 |
Senior Member
|
Re: 6 volt alternator problem
I had the same problem after my A sat for a long period of time due to COVID. I took it to an auto electric shop for a checkup. They put it on a bench tester and really revved it up. He was able to excite the alternator and get it going again. He said over time it had lost its magnetic field. I put the alternator back on the car and no problems since. It is possible your regulator died but not too probable.
|
11-14-2022, 07:30 PM | #9 |
Senior Member
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,527
|
Re: 6 volt alternator problem
If you don't mind doing some DIY work on it, the overhaul/conversion kits are available for the GM10si type alternators. The kit includes all that in needed for a 6-volt positive ground alternator conversion or overhaul.
https://www.ebay.com/itm/190696606664 These alternators are used on old tractors as well as antique cars so there are a lot of them around. This kit may be available from other sources for a better price. Just make sure it is for 6-volt positive ground. The kits are available in a lot of different applications and voltages. |
|
|
Sponsored Links (Register now to hide all advertisements) |
|