6v negative ground?

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staninlowerAL
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Re: 6v negative ground?

Postby staninlowerAL » Thu Apr 02, 2020 3:58 am

Post ground system should have + coil terminal connected to the points.

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Re: 6v negative ground?

Postby Jim Becker » Thu Apr 02, 2020 1:19 pm

Nybz wrote:The amp meter was showing slight discharge when ignition switch was turned on.

In that case, your ammeter wires have been swapped reversing the ammeter readings. After you reverse the battery the ammeter will read backwards until you swap the wires at the ammeter back to their original positions.

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Re: 6v negative ground?

Postby Glen » Thu Apr 02, 2020 6:50 pm

Hi,
I can't see the voltage regulator much in your pic on page 1 of this post, it is too dark, but it looks like a different than original style regulator. It is possible someone put on a regulator for a 6 volt, negative ground system.
There might be identification on the bottom of it telling the voltage and which ground it is.
You could take it off and look.
If it is negative ground, and works, I wouldn't connect the system with positive ground.
But you said it doesn't charge, so it might need replacing.

Below is a pic from Brillman of the 6 volt positive ground regulator that Cubs use. :)
Attachments
Cub voltage regulator 6 volts B.jpg
Last edited by Glen on Thu Apr 02, 2020 10:30 pm, edited 1 time in total.

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Re: 6v negative ground?

Postby Eugene » Thu Apr 02, 2020 7:08 pm

Glen wrote:It is possible someone put on a regulator for a 6 volt, negative ground system.
Most of the 6V regulators are both positive and negative ground, requiring polarizing to accomplish the desire polarity ground.
But you said it doesn't charge, so it might need replacing.
Nybz wrote:I currently dont have a 6v charger so I haven't been keeping it charged. The amp meter wasn't reading it was charging when it was running, it was going into the discharge zone.
I have an excuse. CRS.

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Re: 6v negative ground?

Postby Glen » Thu Apr 02, 2020 10:27 pm

Hi,
The new voltage regulators I have bought say for negative or positive ground on the bottom of them.
I've never tried connecting them the other way from what is written on them.

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Re: 6v negative ground?

Postby Gary Dotson » Fri Apr 03, 2020 8:05 am

The regulator will operate either neg. or pos. I asked an old time Starter/Generator guy about them. According to him, the regulator contacts are dissimilar metals. Neg. or Pos. determines which metal is on which side. When a Pos. ground regulator is used as Neg. ground, in theory, the contact points won't last as long. According to him!!

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Re: 6v negative ground?

Postby Jim Becker » Fri Apr 03, 2020 11:36 am

Gary Dotson wrote:The regulator will operate either neg. or pos. I asked an old time Starter/Generator guy about them. According to him, the regulator contacts are dissimilar metals. Neg. or Pos. determines which metal is on which side. When a Pos. ground regulator is used as Neg. ground, in theory, the contact points won't last as long. According to him!!

That is absolutely correct for a mechanical regulator. The more recent replacement regulators that are labeled for positive or negative either don't use two different metals for the contacts or decided to ignore the problem of which metal belongs on which side. That may be one of the reasons newer replacement regulators don't last like the older ones did.

The rest of this doesn't typically apply to most Cubs.
Solid state (or transistorized) regulators will only work if the polarity is correct. These designs didn't come along until well after most of the world had changed over to alternators. So you mostly don't run into a problem with them on generator systems. I say mostly because, as always, there is an exception. There are solid state cut-outs on the market. The only ones I have seen are packaged in a small housing, just big enough for a single old-style relay. If you have a solid state cut-out and reverse the battery, you need to reverse the cut-out connections. Site sponsor Brillman sell both styles of cut-out relays. The units are labeled adequately for proper wiring of either positive or negative ground systems.

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Re: 6v negative ground?

Postby Potato Wilson » Thu May 19, 2022 8:31 pm

Helpful thread…
The 53 I got for my wife is hooked up with negative ground, and the ignition hot goes to the + side of the coil. I want it to be as original, so I’m thinking I’ll need to reverse the coil hookup too?

staninlowerAL
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Tractors Owned: Cubs: (3)'49's, (1 is parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (3)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
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Location: AL (Southwest)

Re: 6v negative ground?

Postby staninlowerAL » Fri May 20, 2022 2:38 am

This thread is more than 2 years old, it would be better to start a new one. That said, you did not say if your system is 6v or been converted to 12v. If converted what are the details.
EDIT: :oops: Just noticed that my post above from April 02, 2020 "Post ground system should have + coil terminal connected to the points." should state positive ground system...... Sorry.


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