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M | 6 volt system is boarder line getting it started . I heard putting a 8volt in it will start better and can leave everything else the same. |
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Morris, IL | We did to a Super H, The regulator had to be tweaked or battery would run dead and we put a resistor ahead of the coil otherwise points wouldn't last at all. That is all i can think of right now. Does help with starting. |
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Hagen Brothers farms,Goodrich ND | shoop - 3/29/2017 19:07
6 volt system is boarder line getting it started . I heard putting a 8volt in it will start better and can leave everything else the same.
Depends on what it goes in. If the machine has an actual voltage regulator, it needs to be adjusted to charge an 8 volt battery.
A 6 volt battery needs 7.4 volts to charge, an 8 volt battery needs the generator to put out about 9.5 volts to charge. 9.5 volts is hard on ignition systems and light bulbs designed for 7.5 volts. The old Farmall tractors with a generator cutout and a manual low / high switch to set charge rate, may get by with nothing or possibly a third brush adjustment.
IMHO, if 6volt will not do, your better off going right to a 12V conversion with an alternator. |
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Faunsdale, AL | Jon Hagen - 3/29/2017 19:17
IMHO, if 6volt will not do, your better off going right to a 12V conversion with an alternator.
Best advice yet. Just too many ways of converting to 12 volts to be worth the continuing headache of 8 volts.
Many of the old 6 volt starters will live a long time getting 12 volts to crank. The weak link is reportedly the starter drive but the ones I have used never broke. Cranked a G Allis Chalmers for many years on 12 volts. The CAT pony starters don't get cranked that much and it's usually through a set of jumper cables, but no trouble from them yet.
Might be cheaper to go with a new 12 volt starter and alternator and sell your functioning 6 volt components to someone that has to have it authentic. |
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east central ND | I put a 8 volt in the old D8 cat. Works good, spins the pony starter a bit faster. Turned up the regulator. Has a magneto, so did not have to do anything else. |
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Fruita CO | +1-leave the 6V starter...she'll have to slow down to idle...starter will last forever if you keep it tuned up & don't have to grind on it. |
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Pittsburg, Kansas | I used to have a D7 3T that the owner before me did the same thing. John |
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| If possible do the 12. H Farmall has a magneto so no ignition issues. 1 wire alternator and a happy 6v starter. A 6 V starter actually has heavier windings in them so 12 v is no problem. |
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NW OHIO | Clean all your battery connections and make sure your battery cables are sized right for a six volt system. I have 1947 Studebaker that would always struggle to crank over until I changed out a bad ground cable. I couldn't believe the difference it made cranking the engine over. |
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Wallis, TX | Not all Farmall H's have mags, lots have distributors. |
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| The use of an 8 volt battery is a cobble of a working system.
6 volt starter draws more current than a 12 volt starter (can be twice) and so needs FAT battery to starter cables and CLEAN connections. In my experience with a new '54 Ford my dad bought that year was that battery posts and connectors needed cleaning twice a year. A task he assigned to me and 9 years later when I graduated from college he gave it to me as a graduation present. There just isn't much tolerance for the voltage drop of a dirty connection or too skinny wires starting with 6 volts. There is more tolerance for 12 volt battery connections but they ought to be cleaned about every couple years too.
8 volt battery works by giving more tolerance for bad connections and skinny wires, but to charge right it needs a voltage regulator change, or a unregulated three brush generator that is regulated only to limit the maximum current but overcharges the battery when run a long time. There are no standard replacement 8 volt regulators. And then lamp life will be short and also point life without dropping the coil voltage back to 6 volts as others have posted.
Gerald J. |
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8 volt automotive battery in a vehicle within six volt system
