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Posted by buickanddeere on July 25, 2011 at 03:41:26 from (216.183.135.203):

In Reply to: Re: changing from two batterys too one JD 2640 posted by Dieselrider on July 25, 2011 at 03:19:53:

Batteries have not been substantially improved since 1979. The tractor has not become easier to start with the passage of time either.
The starter requires enough current but most folk forget about maintaining voltage while cranking.
Batteries do not keep a 12.6 terminal voltage while under load. The higher the load, the lower the terminal voltage. Try measuring some time.
Starter motor as with any other electric motor. They draw higher current to attempt compensation for lower voltage. Just like a low powered, bogging skill saw that burns out. On the end of too many extension cords.
Two batteries were used to allow cramming enough capacity into an unhandy location.
If you live in the south and operate the tractor spring, summer and fall. Then a single group 31 will do. However I'm assuming you want to use just one group 78 or similar battery.
Battery and starter life will be reduced. By how much, it depends.
Just how much are you hoping to save with one battery?
As for the know nothings that want you to smoke a Dubuque/Mannheim Ag tractors electrical system with a 24V connection. Best just ignore their "help".


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