Alternator for cub

[Ohiowoodchuck]

What one wire alternator are you guys putting on your Cubs.

[Mht]

I’ve done two recently and used a single wire alternator from NAPA. The part number is 213-4011SW with a price of 61.49. I fabricated a bracket and adjustment arm as the stock generator bracket and adjustment arm would not work with that alternator. That particular alternator worked great and charges fine at any speed above low idle

[Ohiowoodchuck]

I have a one wire on it now but it’s junk. I don’t think I will have to make a different bracket.

[Eugene]

I have a one wire on it now but it’s junk. I don’t think I will have to make a different bracket.

Is this a new installation or has the alternator been previously working?

Some one wire alternators do not work with low rpm tractor engines.

[Ohiowoodchuck]

It will not charge the battery. I was looking for one that will work with a low rpm tractor. Also do you guys use the or style generator belt for the alternator.

[Mht]

I used the original generator belt. I made my bracket so it would work with the original belt so I wouldn’t have to keep track of a different belt part number

[SONNY]

I was told that alternators have to spin way faster than gens do ----dont know since I am stickin to gens on mine.

[Eugene]

Some alternators need to be excited. They could be excited by high rpms or a switched wire and diode to the #1 terminal. Once excited they will usually charge at low rpms.

Ohiowoodchuck. Which alternator, make and model did you purchase? Are you sure it's a one wire alternator - sometimes they get mixed up in their boxes?

I asked earlier. Did the alternator previously work or is this a new installation?

My WD Allis'. I had to exchange the alternator pulley with the generator pulley for the belts to work.

[Ohiowoodchuck]

I bought a new one wire. The previous one had bad bearings and the fan on the alternator was bent. Do I need to run the wire back the ammeter. It currently runs to the starter post and I’m not getting it to excite. The lights are not hooked up. The only load I have is the coil and the distributor. I just use it for my cultivating tractor.

[Eugene]

Normally the single wire alternator is wired from the battery post on the alternator to the ampgauge.

If wired from the alternator battery post to the starter terminal, the ampgauge will not indicate a charge or discharge.

[Ohiowoodchuck]

I ran a wire from the alternator back to the ammeter. Put it all back together and now my pull type starter switch won’t engage. I’ll have to fix that before I can test. The paperwork says it’s a 63 amp alternator. I wonder if the cub will turn enough rpm to excite it. I’m only getting a .5 amp draw with the ignition on.

[Lt.Mike]

I’ve done two recently and used a single wire alternator from NAPA. The part number is 213-4011SW with a price of 61.49. I fabricated a bracket and adjustment arm as the stock generator bracket and adjustment arm would not work with that alternator. That particular alternator worked great and charges fine at any speed above low idle

I recently learned of NAPA’s part# for this alternator which is designed for low rpm charging. I got this alternator from another source years ago for my lo-boy and it’s work very well.

[Ohiowoodchuck]

Best I can get is 12.8 volts out of it at full throttle.

[Eugene]

I wonder if the cub will turn enough rpm to excite it. I’m only getting a .5 amp draw with the ignition on.

As I said before, I have 3 each 63 amp Delco clone single wire alternators installed. They work fine. Charge at anything above engine dead low idle.

.5 amp draw is normal with the ignition switch on and the points closed.

Connect the battery cables to the battery or - - the battery cable to the starter.

[Ohiowoodchuck]

I checked it again and 12.9 is what I’m getting with it running at the battery. This is with the wire hooked to the ammeter. If you sitting on the tractor and looking at the ammeter, I got the alternator wire hooked to the left terminal along with the headlight switch and ignition toggle switch. I got one wire coming from the starting post to the right side of the ammeter. There’s no markings on the back of it to identify the terminals.