6 volt gennie internal wiring question

Britcheflee · Oct 7, 2022

No charge from 6 volt gennie with positive ground. Took it apart and it was very dirty inside as well as rust. Gave everything a good clean and was about to put it together again when I saw something which I think is the cause of the problem. One wire from the field coil has a connection and was connected to the small nut on the end plate to one of the brushes - there is what is left of a bit of wire on the other wire which connects the two field coils - should this actually be connected to the other brush with the flat head screw which I am pointing at? Hopefully the pictures explain it better than I am doing.

This post was edited by Britcheflee on 10/07/2022 at 04:46 pm.

Steve@Advance · Oct 7, 2022

Here's a link to how it wires.

Look at the drawings on the left, you'll have to determine if you have an A
or B circuit. You should be able to tell from the way it was wired, and yes
the 2 field coils are wired together.
Generator Wiring

Janicholson · Oct 7, 2022

It is an A type circuit. The wire between the two field windings should be connected, soldered. and insulated from all contact. The end with the connector
should be as it was, under the nut, and soldered to the wire it seems to be wrapped around (good connection there). The other connection (far left in the first
image) is as it should be, connecting the field winding to the F post on the outside. The field gets electricity from the Nut/stud connection at the brush, sends
it through the field windings in series with each other, then out the F terminal where it is sent to the regulator. The regulator, in this type, grounds the
field through a set of points that vibrate creating a intermittent path to ground through the regulator frame to the mount to the place it is mounted. The output
voltage is thus regulated by chopping the field current into pulses that cause variable field strength (like a slider dimmer switch in the house). Jim

John T · Oct 8, 2022

I agree with Jim. On a Class A Genny, one end of the first field coil attaches to the UNGrounded Brush
(which also connects to the ARM post). End of that field splices with second field and its other end leads
to the FLD post.

Once you insure its wired correct if you work through my Troubleshooting Procedure linked below it can
show you if non charging is a Genny or a Voltage Regulator problem.

If the two field coils werent connected and each end wasnt on the right place, theres your problem, NO
NEED FOR MORE TROUBLESHOOTING

https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=ttalk&th=2060825

John T
John Ts Charging Troubleshooting

Britcheflee · Oct 8, 2022

Thank you! I have a couple more pictures at a different angle to make sure Im doing this right. The wire with the existing connector will be insulated and re-connected to the brush with the small nut. The wire between the two field coils will be insulated - my concern is that I am not understanding where that little nubbin of a wire goes to...the other wire at the bottom of the field coil goes to the F connection for field energizing I assume. Is that bit of wire with solder on it anything? Sorry please be patient as electrical stuff is not my strong point.

John T · Oct 8, 2022

I just cant figure it out from the picture, but as Jim and I described below and Steves pictures indicate,
once more: Field 1 starts at the UNgrounded brush,,,,,,,,,,Its other end splices to Field 2,,,,,,,,Other end
of Field 2 connects to the gennys FLD post..

Make sense, got it ?? Maybe Steve or Jim can interpret your picture better and help more

John T

JMOR · Oct 8, 2022

(quoted from post at 10:50:36 10/08/22)

Thank you! I have a couple more pictures at a different angle to make sure Im doing this right. The wire with the existing connector will be insulated and re-connected to the brush with the small nut. The wire between the two field coils will be insulated - my concern is that I am not understanding where that little nubbin of a wire goes to...the other wire at the bottom of the field coil goes to the F connection for field energizing I assume. Is that bit of wire with solder on it anything? Sorry please be patient as electrical stuff is not my strong point.

hat little "nubbin" is just where the two fields are connected together (twisted & soldered)...it goes nowhere else.

wore out · Oct 8, 2022

''I am not understanding where that little nubbin of a wire goes to''

It is simply a soldered splice where the two field coils are connected in series.

It was insulated (and hidden) by a short length of braided tubing that has been pushed to one side revealing the splice.

Wiggle the insulation back over the splice and don't give it another thought... ''out of sight, out of mind''!

Britcheflee · Oct 8, 2022

HA!!! Your right! I pulled back some of the sheathing and its exactly as you say....really fooled me as it sure looked like it was another connection to something - thank you all...now to insulate and put it back together. sorry about blurry pic but there it is.

John T · Oct 8, 2022

Thanks, MUCH better picture. As I stated below, Field 1 starts at the Ungrounded brush,,,,,Its other end
splices to Field 2,,,,,,Field 2's other end attaches to FLD post.

The F1 F2 splice needs to be INSULATED

John T

Britcheflee · Oct 8, 2022

Yes sir - cleaned and insulated all the wires and cleaned all the contacts - put it back on, polarized it and......it works!!!! Thank you all for your advice.

6 volt gennie internal wiring question

Britcheflee

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Steve@Advance

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Janicholson

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John T

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Britcheflee

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John T

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JMOR

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wore out

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Britcheflee

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John T

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