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john(MI) 
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Location: SE MI
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 Topic: 6v starter conversion to 12v?
Posted: 14 Jul 2010 at 1:13pm |
My D14 starter is 6v. Everything else is 12v. I have heard mention on here that the starter can be converted to 12v. Is this possible and what would be changed to accomplish this.
I am familiar with ohm's law, and it seems resistance is what would need changing, but I can't figure out how that would be done?
Any help out there?
Thanks!
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D14, D17, 5020, 612H, CASE 446
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Matt MN
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Joined: 14 Sep 2009
Location: Silver lake MN
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Posted: 14 Jul 2010 at 1:16pm |
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A factory D-14 starter will work just fine when hooked up to 12 volts.
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BobHnwO
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Location: Jenera Ohio
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Posted: 14 Jul 2010 at 1:17pm |
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Starters will work on 6 or 12 volts.
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wbecker
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Joined: 29 Oct 2009
Location: STL
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Posted: 14 Jul 2010 at 4:21pm |
The 6V starter will work with a 12V system, but it hits the ring gear rather hard. I have used a 6V starter many times on a 12V system without a problem. On my D10 (12V) I decided to have it changed to 12V. I took it to a auto electrical place and asked them, they said all it needs is the 12V field windings installed and they are available, so I had it done. Not expensive, and should be better on the bendix and the ring gear.
Bill Becker
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LouSWPA
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Joined: 11 Sep 2009
Location: Clinton, Pa
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Posted: 14 Jul 2010 at 4:45pm |
John,
All of my tractors that run (5) except for one are 6v starter with 12v systems. there are two issues with this, wbecker mentions one and the other is that the stater winding may turn on the shaft from higher torque, I had one do that. But, I don't know that I'd go to the expense of changing one over until it needed service anyway. just my 2cents
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Mike(SEIN)
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Joined: 12 Sep 2009
Location: RUSH County IN.
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Posted: 14 Jul 2010 at 4:57pm |
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My startsr rebuilder Put a D17 bendix on my WD starter after I converted to 12v. He said there is a spring to keep it from hitting so hard when the bendix flys out.
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john(MI)
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Posted: 15 Jul 2010 at 9:57am |
I just replaced the ring gear and the starter is beating up on the new one. Just wanted to be sure there was nothing I could do to the starter, before going the repair shop route.
Thanks for all the responses.
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D14, D17, 5020, 612H, CASE 446
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Dave Richards (WV)
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Posted: 15 Jul 2010 at 1:14pm |
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John, my D-14 is factory 12v. I think they switched somewhere in the later production. Also neg ground. You might be just as well off finding the 12v starter.
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BrettPhillips
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Posted: 15 Jul 2010 at 1:21pm |
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I believe that the 6V D14 uses a different ring gear than the later 12V models used. If you could swap starter drives between the two (to get the right tooth pitch and count), you would probably come up with what you need though.
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Dave Richards (WV)
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Posted: 15 Jul 2010 at 3:24pm |
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Nice catch Brett!! I didn't know that. Do you think he will need to switch springs in the starter drive? Is that possible?
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BrettPhillips
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Posted: 15 Jul 2010 at 8:01pm |
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The parts manual says that the 6V D14's (before tractor #19001) use a 93 tooth ring gear, while the 12 Volt tractors have a ring gear with 116 teeth. According to the manual, the 6 and 12 Volt starters do not share many parts at all. The starter drive is not broken down into individual parts, so it looks like the springs are included with the drive.
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TedBuiskerN.IL.
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Location: Davis, IL.
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Posted: 16 Jul 2010 at 9:07am |
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Sounds like more trouble than it's worth. Leave it original and put on big cables and keep things clean, and six volts will work just fine up through the WD45 size engines.
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Gerald J.
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Posted: 16 Jul 2010 at 9:27am |
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1964 Ford cranked a 232 cubic inch 6 or a 289 cubic inch V-8 on 6 volts. My dad and I put over 100K on a 6 with regular battery post cleaning. It would only be reluctant to start when it was beginning to need battery post cleaning.
Gerald J.
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john(MI)
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Posted: 16 Jul 2010 at 9:27am |
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I was thinking of going back to 6v, but I would need to buy a battery and generator, at a minimum. Figured going with the starter change may be easier!
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D14, D17, 5020, 612H, CASE 446
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HD6GTOM
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Joined: 30 Nov 2009
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Posted: 16 Jul 2010 at 10:30am |
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John I had dads B starter changed to 12 volt. I thought they changed it from a 2 brush to a 4 brush, and changed some of the internal wiring. It works far better than the 6 volt ever did, even with the big cables.
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john(MI)
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Posted: 16 Jul 2010 at 10:36am |
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HD6GTOM, thanks for the info. I was thinking it would be easier to go that route. Thanks again.
Edited by john(MI) - 16 Jul 2010 at 10:37am
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D14, D17, 5020, 612H, CASE 446
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