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6Volt charging system
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- 10+ Years
- Posts: 48
- Joined: Sun Jul 26, 2009 2:26 pm
- Zip Code: 29040
- Tractors Owned: '56 Cub
- Location: Dalzell, SC
6Volt charging system
Alright all of you old dogs, it's been a while since I've been on the cite but I need your wealth of knowledge. School, work and deployments have kept me busy but I'm at my wits end with my Cub's charging system. My '56 always had charging problems while it was at our farm in OH. When I got it to SC I used the troubleshooting tree many of you have provided and narrowed it down to a bad VR. That fixed the problem for almost 3 years and then it started acting up again. I shot it down to another bad VR and bought one from TSC. Again, it worked well for a while but this year I noticed my amp meter stays on the discharge side while I'm mowing. I keep the battery on a charger/tender so it always starts fine but steady discharging while in operation. When I check the batt while running the voltage readings are all over the place. Good ground at the batt and VR. I used the tree again and when I got to the step of connecting a jumper from the "F" to "Gen" on the VR the wire got very warm so couldn't go any further. I'm suspecting another bad VR, and since it was a cheapy from TSC that is probably the problem. Any chance I have a bad gen burning up VRs? Is the erratic reading at the batt while running an indication of a particular part going bad? Thanks for any help.
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- 10+ Years
- Posts: 2929
- Joined: Sun Apr 19, 2009 9:51 pm
- Zip Code: 63664
- Location: MO, Potosi
Re: 6Volt charging system
Is this a digital volt meter by any chance? Much to sensitive to electrical noise (generator brush induced not a loud radio )to give an accurate reading. If you have an analog meter (one with a needle) it will smooth out the flucations and give you an accurate reading.Biscuit wrote:.... Is the erratic reading at the batt while running an indication of a particular part going bad? Thanks for any help.
I would take the cover off the voltage regulator and make sure both sets of points aren't stuck, burnt, or pitted.
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- 10+ Years
- Posts: 48
- Joined: Sun Jul 26, 2009 2:26 pm
- Zip Code: 29040
- Tractors Owned: '56 Cub
- Location: Dalzell, SC
Re: 6Volt charging system
Thanks and yes it is a digital. Not sure if I still have my old analog but I'll take your advice and see if I can dig it up. I thought about opening up the VR but didn't have access to a breakdown so I wasn't even sure what I was looking for. Is the VR repairable in any way or is it pretty much garbage when it goes bad?
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- 10+ Years
- Posts: 1421
- Joined: Sun Apr 30, 2006 2:54 pm
- Zip Code: 60073
- Circle of Safety: Y
- Location: IL, Round Lake Heights
Re: 6Volt charging system
I had a problem with VRs not lasting more than a few years myself (didn't seem to matter whether it was the expensive or cheap one). Finally came across a shop manual for them and decided to try to fix it. The air gaps were wrong, so Iadjusted them, and it worked. Being a pack rat frugal, I had saved the ones I took off, so I took the one that was on the tractor when I was given her (which looks to be original) and reset the point gaps on that one, swapped it in, and its been working for four or five years now. Never got a round tuit to try the third one that I still have on the shelf, but I suspect that I could cure that one, too.
Michael Cummings
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.
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- 10+ Years
- Posts: 7846
- Joined: Tue Feb 15, 2005 10:10 am
- Zip Code: 71023
- Circle of Safety: Y
- Location: LA, Doyline
Re: 6Volt charging system
When you do the jumper wire YOU JUST MAKE IT SPARK DO NOT KEEP THE WIRE ON TERMINALS.
1975 cub (LouAnn) serial # 245946, 1941 John Deere Model H
Good judgment comes from experience,
and a lot of that comes from bad judgment. Will Rogers
Good judgment comes from experience,
and a lot of that comes from bad judgment. Will Rogers
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- 10+ Years
- Posts: 48
- Joined: Sun Jul 26, 2009 2:26 pm
- Zip Code: 29040
- Tractors Owned: '56 Cub
- Location: Dalzell, SC
Re: 6Volt charging system
This morning a took a printed copy of the "Troubleshooting Schematic" to the barn with me and started from the beginning again. I checked the volts on the batt without the tractor running and it was 6.35. When I got to step 3 of the tree , jumping the FLD on the VR terminal to GND, the amp meter on the tractor pegged hard right. I checked the volts again at the batt while it was running (couldn't find my analog so had to use the digital) the volts were jumping around and would peg around 12.8. After cutting off the tractor I checked the batt volts and they had gone up to 6.75. Opened up the VR and no points are sticking and don't look burnt. I'm going to emery the points on the VR and put it back in so I can mow today. Probably order a VR from TM.
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- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: 6Volt charging system
Make sure the ammeter has a good ground.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
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- 10+ Years
- Posts: 505
- Joined: Fri May 05, 2006 12:00 am
- Zip Code: 54515
- Circle of Safety: Y
- Location: WI, Catawba
Re: 6Volt charging system
Biscuit; Here are a couple of threads that may help you. They aren't perfect as they don't give exact specs., especially for regulator adjustments. The second and third links are the same tests, just different formats.
http://www.farmallcub.com/phpBB2/viewtopic.php?f=140&t=80345
http://www.farmallcub.com/phpBB2/viewtopic.php?f=140&t=80347
http://www.farmallcub.com/phpBB2/viewtopic.php?f=140&t=80346
http://www.farmallcub.com/phpBB2/viewtopic.php?f=140&t=80345
http://www.farmallcub.com/phpBB2/viewtopic.php?f=140&t=80347
http://www.farmallcub.com/phpBB2/viewtopic.php?f=140&t=80346
Mark "birddog" Birdeau
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- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: 6Volt charging system
Meant to say regulator.John *.?-!.* cub owner wrote:Make sure theammeterhas a good ground.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
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