Farm Equipment - 6v or 12v

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6v or 12v

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=204700
Printed Date: 27 Dec 2024 at 3:09am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 6v or 12v

Posted By: D171958
Subject: 6v or 12v
Date Posted: 25 Dec 2024 at 6:12pm

I got a series one d17 and I was wondering if 12v or 6v would be better and if I should leave the points in the distributor or get an electric conversion kit.

Replies:

Posted By: DrAllis
Date Posted: 25 Dec 2024 at 6:34pm

Any age D-17 was always 12 volts. Never 6 volts. Electronic ignition won't make it run any better, just reduces maintenance over the years.

Posted By: jvin248
Date Posted: 25 Dec 2024 at 6:34pm

I rebuild for function, not authentic factory features which you and other comments may chase, this is the setup I prefer:

12v neg ground

LED lights or bulbs

Good quality ignition key switch for boating wet conditions

Electronic ignition won't survive an EMP event...

Verify your coil is 12v internal resistor type

Alternator with internal regulator, either the big Delco/GM or the Denso small one used by the hot rod builders as it tucks away easier.

Posted By: DrAllis
Date Posted: 25 Dec 2024 at 6:36pm

12 volt POSITIVE ground with a generator on an A-C.

Posted By: youngorange2000
Date Posted: 25 Dec 2024 at 10:25pm

I just did one for a guy that had the original 12v generator with the external voltage regulator and positive ground. We trashed that rats nest for a new brillman 12v neg ground 1 wire alternator harness and a new alternator. I the end it was cheaper to go with a $85 alternator rather than have the generator rebuilt for $60 and still have to buy a $115 USA made voltage regulator.

Posted By: steve(ill)
Date Posted: 25 Dec 2024 at 10:30pm

if your present generator is working, it would be Positive ground... no problem... BUT, if it is bad or goes bad, that is definitely the time to consider an alternator and NEG ground.

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Like them all, but love the "B"s.

Posted By: Steve in NJ
Date Posted: 25 Dec 2024 at 11:40pm

The cheaper way to go is usually with an Alternator. Some people don't like the look of an Alternator on the older Tractors. Some what the reliability not the originality. Your call there. If you go with an Alternator, its better to wire it three wire not one wire especially on the older Tractors. Loose the Ammeter and install a Voltmeter for safety and accurate charging rates.

Steve@B&B

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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife

Posted By: D171958
Date Posted: 26 Dec 2024 at 8:15am

Ok so what kind of coil should I use if it’s 12v positive or negative.

Posted By: DrAllis
Date Posted: 26 Dec 2024 at 8:19am

Same coil. Just switch the wires around. Positive ground on the battery needs + post on the coil to the distributer. Negative ground on the battery needs - post on the coil to the distributer.

Posted By: jaybmiller
Date Posted: 26 Dec 2024 at 8:30am

My 'vote' is for 12v alternator. I use the CS130 series...small in size, 40 amps, free. Wire into 'idiot light'. If someone whines about 'ewww an alternator' tell them,'fine YOU pay for a generator.

Either way, as 12v , use negative ground. saves a lot of spark when you jump start that guy's truck who said 'ewww, an alternator' !!!

Electronic ignitions are NOT bullet proof. Hooked up wrong and zappp.... $150 piece of artwork, and no running tractor....

In the end ,it's your tractor, your choice.

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: steve(ill)
Date Posted: 26 Dec 2024 at 12:37pm

your coil should say 12v with INTERNAL resistor on the case.... any coil like that will work.

if the system is NEGATIVE GROUND then the neg side of the coil goes to the distributor point... If it is POSITIVE ground, then the POS side of the coil goes to the distributor point.

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Like them all, but love the "B"s.

Posted By: jvin248
Date Posted: 26 Dec 2024 at 6:10pm

Use an ohm meter on the coil to verify it has the internal resistor. 3ohms = resistor, 1.5ohm = coil for external resistor.

Posted By: jvin248
Date Posted: 26 Dec 2024 at 6:13pm

Many of us have found the distributor tune up kits have bad condenser/capacitors and retrofit the old one that was in the tractor. So don't throw out all the old parts when fixing it up.

Posted By: D171958
Date Posted: 26 Dec 2024 at 6:30pm

Ok thanks for the help I’ve decided to keep it 12 negative and put an alternator on with the electric conversion

Posted By: jaybmiller
Date Posted: 26 Dec 2024 at 6:40pm

great..now consider a 100% rewire while your at it. That way you KNOW you have GOOD wires..here,there, everywhere.

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: D171958
Date Posted: 26 Dec 2024 at 7:10pm

I was planning on it because it sat outside for years and it’s an ffa project and family project and I don’t want to skimp on it.