24 volt system

buffel · 06-26-08, 01:36 PM

Is it possible to use a 12 volt alternator on a 24 volt system?

Spddude · 06-26-08, 03:47 PM

If you install it as an auxiliary/second alternator for a separate 12v system to run all your 12v accessories then yes.

rchalmers3 · 06-26-08, 03:58 PM

X2 plus the 12v alternator will not have sufficient capacity to charge a 24v battery bank.

Rick

buffel · 06-26-08, 11:01 PM

Will it burn out the 12 volt alternator if I connect it to a 24 volt system?

There are a couple of wiring issues with this vehicle which may have been converted from 12 volt to 24 volt in the past. My alternator has burned out and when I took it in for repairs two shops have told me that it is a 12 volt alternator as they can check from the windings.

They said this even though the brush holder says 24 volt. I put a 12 volt alternator and it isn't working, hence the qusetions.

roscoFJ73 · 06-27-08, 12:31 AM

Quote:

Originally Posted by buffel

Will it burn out the 12 volt alternator if I connect it to a 24 volt system?

There are a couple of wiring issues with this vehicle which may have been converted from 12 volt to 24 volt in the past. My alternator has burned out and when I took it in for repairs two shops have told me that it is a 12 volt alternator as they can check from the windings.

They said this even though the brush holder says 24 volt. I put a 12 volt alternator and it isn't working, hence the qusetions.

A good start would be to tell everyone what model it is and its counrty of origin

Wedg3 · 06-27-08, 06:59 PM

Your Battery will charge the amount a volts your alternator will try. If you have 2 batterie for a 12v alternator. Your batterie will run at 6 volts each if no modification is done to you system. You can plug a 12 volt alternator.. but you will buy two new batterie in no long and you cannot start a 24volt starter with that. If you have only one batterie in your truck then you have a 12 volts system then no problème with a 12volts alternator. But if you run with the alternator that burn and you have 2 batteries... you have certainly a 24 volts alternator. Make it rebuild for 24 volts. Change the bearring and diode in the same tame... a little bit more but no probleme for 20 years after that.

06-26-08, 01:36 PM	#1
buffel IH8MUD Rookie Join Date: Jun 2008 Posts: 2	24 volt system Is it possible to use a 12 volt alternator on a 24 volt system?

06-26-08, 03:47 PM	#2
Spddude IH8MUD Rookie Join Date: Jun 2007 Location: British Columbia Posts: 22	If you install it as an auxiliary/second alternator for a separate 12v system to run all your 12v accessories then yes. __________________ '92 HZJ73 Locked, Safari Turbo, 3" stainless exhaust

06-27-08, 06:59 PM	#6
Wedg3 IH8MUD Rookie Join Date: Feb 2006 Location: Acton Vale Posts: 3	Your Battery will charge the amount a volts your alternator will try. If you have 2 batterie for a 12v alternator. Your batterie will run at 6 volts each if no modification is done to you system. You can plug a 12 volt alternator.. but you will buy two new batterie in no long and you cannot start a 24volt starter with that. If you have only one batterie in your truck then you have a 12 volts system then no problème with a 12volts alternator. But if you run with the alternator that burn and you have 2 batteries... you have certainly a 24 volts alternator. Make it rebuild for 24 volts. Change the bearring and diode in the same tame... a little bit more but no probleme for 20 years after that. __________________ -------------------------------------------------------------- Owner of a bj40 1979 with turbo B 3.0L engine frame down and rebuild with pure american steel Now hard enough for Quebec Winter ---------------------------------------------------------------

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06-26-08, 03:58 PM	#3
rchalmers3 IH8MUD Addict Join Date: Jun 2007 Location: Costa Rica, Central America, Earth Posts: 697	X2 plus the 12v alternator will not have sufficient capacity to charge a 24v battery bank. Rick

06-26-08, 11:01 PM	#4
buffel IH8MUD Rookie Join Date: Jun 2008 Posts: 2	Will it burn out the 12 volt alternator if I connect it to a 24 volt system? There are a couple of wiring issues with this vehicle which may have been converted from 12 volt to 24 volt in the past. My alternator has burned out and when I took it in for repairs two shops have told me that it is a 12 volt alternator as they can check from the windings. They said this even though the brush holder says 24 volt. I put a 12 volt alternator and it isn't working, hence the qusetions.