Charging system on 6v 8n

G6 at Snook, TX

Well-known Member
I have a charging issue with my on of my 8n Fords. To set the scene, it is a 1952 6v pos ground with ei.

The tractor set up for about two months this winter with little or no usage. I pulled it out to run it hot about two weeks ago and noticed the ammeter showed no reaction to starting or high rpm. It should have deflected as the points opened/closed on the start and should have shown a heavy charge after a long hibernation and an untouched battery. The ammeter set stone cold straight up.

This is not my first rodeo, but in that charging system, you have the generator and VR. Am I forgetting anything else?

The generator was spun up yesterday on a tester by an old mechanic who knows his stuff. The tester showed a good generator. I replaced the VR because I figured that ten years with the old one was the likely culprit. The new one, a VR 950 from NAPA, was polarized after installation, but the ammeter showed no reaction with the new.

Any suggestions? Am I forgetting any other parts of the charging system? I guess the gauge could have gone bad or corroded sitting up since the gauge is untouched and could be around 15 years old.
 
1. Regulators don't require polarizing, it is done to restore residual magnetism in the GENERATOR.

2. Sounds like your Ammeter may be stuck. Check the VOLTAGE at the battery, should come up to 7.4 Volts as it charges. If not, what is the voltage on the generator's output terminal and "FLD" terminal with the engine running above idle?
 
try this.

pull the bat wire off the vreg, hook it to a battery charger with the other side of the charger hooked to chassis. observe your
polarity. negative to wire, positive to ground. turn ont he charger.. ammeter should deflect showing charge.

if not, check the battery voltage while doing so.. it likely shows a charge.. meaning ammeter could be bad.

post back.
 
I know nothing of the EI. However, on my 8N I have one of those expensive VR from NAPA . When it does not show a charge, which is frequent, I remove the cover,
start the tractor, then press down on the windings with the eraser end of a pencil, it always start to charge then. Just my experience only.
 

A VOLTMETER just may be your friend... I would like to see how amp-meter lubbers get around this one that is if you don't fudge up up trying to prove your amp-meter is stuck are defective...

Knock the dust off yer voltmeter worry about the amp meter later...
 

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