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24 volt charging systems

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will

02-07-2000 07:53:12




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I have a JD 730 diesel with a 24 volt charging system. Does anyone out there know where I can get a 24 volt trickle charger. Thx in advance for any / all responces.




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Steve

02-08-2000 20:21:41




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 Re: 24 volt charging systems in reply to will, 02-07-2000 07:53:12  
Why is it so difficult? If you are just trickle charging, just use one 12 volt charger. The amps will get in there, just a bit slower. I have jumped 24 volt systems using one set of cables on one battery and it works. Oughta work for trickle charging.



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Gerald J.

02-09-2000 06:24:12




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 Re: Re: 24 volt charging systems in reply to Steve, 02-08-2000 20:21:41  
Only if you swap the charger from one battery to the other occasionally, otherwise only one of the batteries will be charged.

Gerald J.



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Steamer

02-07-2000 11:59:09




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 Re: 24 volt charging systems in reply to will, 02-07-2000 07:53:12  
It's pretty easy in this case. Battery chargers use transformers that isolate their outputs from each other. If you get two identical 12v trickle chargers, you can hook the (+) lead from one to the (-) lead of the other. This will add the two 12v outputs to give you 24v on the remaining two leads. Attach the remaining (-) and (+) leads to the (-) and (+) on the tractor and you're all set to go.

Make sure to prevent the leads that are tied together from contacting anything on the tractor or you'll have a short on your hands. I'd cut off the battery clips, strip the wires, tie them and tape them with electrical tape. Of course, this'll prevent your using one charger for a 12v battery unless you reattach the missing clip.

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buckeye al

02-07-2000 10:27:56




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 Re: 24 volt charging systems in reply to will, 02-07-2000 07:53:12  
Don't know of any such charger. If somebody has one they are likely to cahrge a lot more for it than you'd pay for a pair of IDENTICAL 12v chargers. There are some other things you could do however. On the 730, the middle of the original 4 battery string is connected to ground. You could hook one 12v trickle charger to the batteries on one side of the ground strap with + to ground and - to other end of this battery or battery pair. You can use a second 12 volt trickle charger to charge the other two batteries by hooking the - of that charger to the ground point and the + of this second charger to the other end of this battery pair. Stated another way.... If you number the batteries 1-4. The + of number 2 and the - of number 3 are connected to ground. Let charger #1 handle batteries 1 & 2, charger #2 to handle 3 & 4. Connect charger 1 + to ground and - to battery #1 -. Connect charger 2 - to ground and charger 2 + to battery 4 +. You could also hook 2, 12 v chargers in series by hooking the minus of one to the + of the other. Connect the remaining + to the + cable going from the battery compartment to the starter. Connect the remaining - clamp to the - cable leaving the compartment. Ignore the ground cables in the battery compartment entirely. The 3010's, 3020's, 4010's and 4020's did this same thing but they used a pair of 12 volt batteries instead of 2 pairs of 6 volters.

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twopop

02-07-2000 19:46:40




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 Re: Re: 24 volt charging systems in reply to buckeye al, 02-07-2000 10:27:56  
THE STARTING SYSTEM OF YOUR TRACTOR IS 24V BUT THE CHARGING SYSTEM IS NOT TRUE 24V. THE GENERATOR ACTUALLY PUTS OUT 12V NEG AND 12V POS.POWER THE NEG GROUNDED SIDE IS TRICKLE CHARGED AS IT IS ONLY USED FOR STARTING AND THE POS. SIDE IS USED FOR IGN. LIGHTS.ETC. YOU SHOULD USE ,IF NECESSARY,TWO SEPERATE CHARGERS AND CHARGE EACH SET OF BATT. SEPERATELY. THE ONLY TIME 24V IS PRESENT IS WHEN THE STARTER IS ENGAGED

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Don

02-08-2000 14:49:47




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 Re: Re: Re: 24 volt charging systems in reply to twopop, 02-07-2000 19:46:40  
The 24 volt systems are 24 v.starters : the Generator is 24 volt the regulater splits to two 12 volt circuits one each of pos. ground and neg ground for the other . If you have a 4 head light system you use 12 volts from each side. Deere used this for all 24 volt systems . You have to balance the system or the batteries on the higher load side wont stay up.



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clooney

02-08-2000 16:31:10




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 Re: Re: Re: Re: 24 volt charging systems in reply to Don, 02-08-2000 14:49:47  
Don, can you elaborate on how that (2) 12v regulator works? Does the generator have two fields with a center tap or? Thanks..clooney



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Gerald J.

02-07-2000 20:58:57




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 Re: Re: Re: 24 volt charging systems in reply to twopop, 02-07-2000 19:46:40  
I don't think so. There's no ground connection in the generator or starter and there's 24 volts between the two output terminals on the generator, the +12 and -12 are 24 volts apart. There's always 24 volts in the system, charging, idling, sleeping, and starting.

Gerald J.



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