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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum

8 volt battery - charge

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Barry-KC

07-30-2003 22:25:28

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I have started using a 8 volt battery for starting my Oliver 70. Six volt just didn't kick hard enough on a tired old engine and I didn't want to change to 12 V.
My question is: How can I charge an 8 V battery?
If I put the 12 V charger on it, then it's internal circuit breaker kicks it off.
Appreciate any ideas

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Ken L

08-02-2003 19:44:06

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

Just put the 8 volt in and don't worry about it. I used 8 volts in J.D. As and IH Ms for years. you don't need to change anything. The 6 volt charging sytem will take care of it. If you need to use a charger, set it on 6 volt.

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08-01-2003 18:03:00

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

My Dad had an Oliver 70 that he put an 8v batt. in. It always was hard to start. It was pulled by the pickup more than it started on its own. Years later I bought an old 53 Willis Jeep with a 6v system. Same story about hard starting for years until I finally put a one wire 12v alternator amd a 12v battery on it. This was the best thing I ever did. It will start now even after setting for weeks. If I spread out that approx $100 cost for the 12v change over, then it is hardly noticeable except for a lot less hassle!

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Jason

08-01-2003 07:27:43

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

I had trouble spinning my old tractor with 6 volts, so I found a short cut-off of 4-ought wire from an electrical contractor for nothing and bought two of those 4 -ought brass connectors from the electrical supply house and hooked them up. Tractor sat outside in -20 weather and started right up, it really spins over good. Get a good ground and let the amperage do the work through those big cables.

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RWT

07-31-2003 21:30:23

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

I used to run and 8 volt in a 77 when I was younger and I never did do anything special.

I don't know for certain (and I have noted that some newer chargers have regulators in them) but I think there is enough latitude in a manual charger to float on up reasonably well and charge that 8 volt.

You will appreciate 12 volts on the 6 volt starter a lot better. I have said it before, you will not burn up the 6 volt starter on 12 volts.

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Barry-KC

07-31-2003 22:24:41

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Re: Re: 8 volt battery - charge in reply to RWT, 07-31-2003 21:30:23

This really is a great board!
Thanks to all - You have told me what I needed to know.
Many thanks,
Barry

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07-31-2003 08:34:44

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

You need a battery charger with an 8 volt setting.

The 8 volt trick was used a lot since you only had to adjust the generators regulator for the tractor to charge the battery. Assuming the charging system wasn't the problem.

In many cases the charging system on these old tractors dosen't work anyway. In this case I'd go with a 12v battery and a new coil. The 12v battery will probably last a month or more on a charge before you need to hook up the battery charger again.

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Barry-KC

07-31-2003 05:33:28

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

Thanks Ollie & RAB
I appreciate your inputs and I will follow up with your suggestions
Barry

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Ollie

07-31-2003 04:44:45

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

They sell 8v chargers but for about the same money you get make up some new battery cables from 1/0 wire with soldered terminals and buy a new NAPA 6v battery. The real issue is how much current, not voltage, is getting to the starter. 6v got the engine started when new, as they age, they get easier, not harder, to turn over.

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Myron KY

07-31-2003 05:42:14

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Re: Re: 8 volt battery - charge in reply to Ollie, 07-31-2003 04:44:45

I agree with both Ollie and RAB.

My suggestion is to purchase the highest CCA rated 6 volt battery that will still physically fit in the 70.

Purchase the largest gage cables you can. Or make your own. (Some use 00 gage wire from a welding supply.)

Make sure all connections are clean and tight. Including starter, generator, voltage regulator, ignition.

A good "tune up" of the ignition system may help as well.

Ain't worth it, but that's my 2�.
Myron KY

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RAB

07-31-2003 00:41:20

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Re: 8 volt battery - charge in reply to Barry-KC, 07-30-2003 22:25:28

You don't say whether you have full charging set-up, or just using a separately charged battery with only a starter motor fitted. Does it have a magneto? If you have a generator on the tractor it will be trying to charge a six volt battery, so won't, as it thinks it's more than fully charged!! Set the regulator to charge an 8 volt battery.
If no generator on tractor, get an 8 volt battery charger!
OR just use a twelve volt battery with your 12 volt battery charger to run the starter motor.
There are loads of references to this topic in the archives.
RAB

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