49 plymouth 12v gm bracket

[stoute]

Does anyone make a bracket for a GM 1 wire . Was already on the car when I got it and the bracket broke on me today (cheap homemade)

Car 49 plymouth flat 6

[DJ194950]

How about a conversion using the stock gen. mt. bracket? See attached from Don C. the most active forum poster?

 

Doesn't appear I did the attachment correctly.

Sure Don C. will get it to ya.

 

DJ

Edited September 28, 2014 by DJ194950

[Don Coatney]

 

 

[DonaldSmith]

Also search "alternator conversion bracket" on the net.  I got one for about $42.  It has several parts to be fiddled with to get the right arrangement.  

 

The ears are more than far enough apart to work with the existing generator bracket.  I spread the ears enough to add a spacer to allow the nuts and bolts to secure all the pieces.  Then I adjusted the fore-and-aft placement of the alternator with washers (and an oversize nut).

 

 

[stoute]

Thank you very much

[LAKOTA169]

I'm in the process of doing this now. I made my own brackets from 1/8x1" strip (cost about $5). If I were to do it again, I would use smaller bolts to hold the pieces together. Need to get a different top (adjustment) bracket as my original one hits the top of the alternator. Need one with a slight curve. Although Don's looks a lot easier to make.

[DonaldSmith]

Adjustment arm:   I had to fiddle with that, too. Made an extension.  Since I took the photo, I reworked the extension to bring the hole more to the right.  Whatever works. 

 

 

[Don Coatney]

The original arm had an offset allowing the belt tightening security bolt to be installed from the radiator side of the original generator.

 

 

The arm I used if I recall was original to a 53 Desoto engine and had the offset located further away from the water pump allowing me to reverse it and with the addition of a nut for a spacer install the tightening bolt from the firewall side of the alternator for correct alignment.

 

 

[DonaldSmith]

I used a stud to anchor the belt-tightening arm to the front cover, so that the arm could rotate as the alternator is pivoted to tighten the belt, without having to loosen a bolt and having it leak.  I slathered the stud with thread seal, and jammed a nut against the housing, to lock the stud in place.  Then I slid the arm onto the stud.  

 

I added a loose nut, drilled through the nut and stud, and and pinned the nut with a cotter pin, to keep the arm on the stud, but free to rotate while adjusting the alternator belt.  

 

In the latest incarnation of the alternator bracket and arm, I deleted the nut and just used a cotter pin and washers to keep the arm on the stud.  Once the belt is tightened, the arm doesn't want to go anywhere. 

 

 

[jhm1mc13]

May I recommend using heavy metal bracket material at least as thick as the block bracket and strong rod.  Mine has developed a twist and will have to be redone.

Jim M

[Don Coatney]

May I recommend using heavy metal bracket material at least as thick as the block bracket and strong rod.  Mine has developed a twist and will have to be redone.

Jim M

How tight is your belt?

[LAKOTA169]

What gauge wire are you using to connect the alternator? I need to buy some.

[Don Coatney]

What gauge wire are you using to connect the alternator? I need to buy some.

I am using #10.

[LAKOTA169]

I am using #10.

Thanks, Don. I was guessing 10 or 12. Another problem I might have, someone wrote 6 volt NEGATIVE ground in magic marker on the alternator. This was an alternator that came with the engine when I bought it in 2008. Pretty sure the lights won't be a problem. and I can switch the wires on the amp gauge and coil. Same with the battery terminals. I'm worried about my original radio. Don't want to mess that up. Not really sure if the alternator is negative or positive ground (or does it matter). Is there a way to test the output as far as ground goes?

[DonaldSmith]

Lakota, you can get your alternator converted to positive ground.  I got my 6 Volt positive ground alternator from American Performance Electric in Madison Heights.  They would know how to convert your alternator.  Also, I've seen somewhere on the internet how to do it.

 

I looked at my radio schematic.  There is a 6 volt circuit to each tube to warm it up, and high voltage ( 200 v plus) circuits to make the electrons jump.  The high voltage is rectified and filtered to provide direct current.  I don't know what would happen at the tubes when the two circuits share the same ground.   We need word from a radio guru. 

[LAKOTA169]

Lakota, you can get your alternator converted to positive ground.  I got my 6 Volt positive ground alternator from American Performance Electric in Madison Heights.  They would know how to convert your alternator.  Also, I've seen somewhere on the internet how to do it.

 

I looked at my radio schematic.  There is a 6 volt circuit to each tube to warm it up, and high voltage ( 200 v plus) circuits to make the electrons jump.  The high voltage is rectified and filtered to provide direct current.  I don't know what would happen at the tubes when the two circuits share the same ground.   We need word from a radio guru. 

A couple of years ago, when I was thinking about the switch, I took this alternator to them. They said it was bad, so I set it aside. I was talking to our Region President about the alternator, and he said he would take it to a place near him (on the east side). They said it was good, so I decided to install it. I just looked closer at the alternator, and it is stamped "NEG" on the housing. I can't read the AMP rating, but 80 amps is hand written on it.