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Another charging question
This week my batteries went dead. The alternator was not charging, only
putting out about 12V. So I put a new alternator in this evening, and I have charge voltage, 13.8V, but the alternator is way overheating. Now the batteries are low, but I would think it should not overheat. I isolated the two batteries and it still gets too hot. What might cause this? -- JimG 80' CJ-7 258 CID 35" BFG MT on 15x10 Centerlines D44 Rear, Dana 30 Front. SOA 4.56 Gears, LockRight F&R Dana 300 w/4:1 & Currie twin sticks Warn X8000i w/ dual batteries |
Re: Another charging question
How did you start it up?
The last alternator I bought and the 'big green' (maybe the name) one my old tenant bought both say the warranty is void if you start them up on a dead battery. A new alternator cannot take that amp surge until the brushes wear in a bit, they just arc out all to crap. Arcing out means heat.... That is why some shops refuse to put a new alternator in with an old or dead battery. The battery needs a charge to break in an alternator. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's JimG wrote: > > This week my batteries went dead. The alternator was not charging, only > putting out about 12V. So I put a new alternator in this evening, and I > have charge voltage, 13.8V, but the alternator is way overheating. Now the > batteries are low, but I would think it should not overheat. I isolated the > two batteries and it still gets too hot. What might cause this? > > -- > JimG > 80' CJ-7 258 CID > 35" BFG MT on 15x10 Centerlines > D44 Rear, Dana 30 Front. SOA > 4.56 Gears, LockRight F&R > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries |
Re: Another charging question
How did you start it up?
The last alternator I bought and the 'big green' (maybe the name) one my old tenant bought both say the warranty is void if you start them up on a dead battery. A new alternator cannot take that amp surge until the brushes wear in a bit, they just arc out all to crap. Arcing out means heat.... That is why some shops refuse to put a new alternator in with an old or dead battery. The battery needs a charge to break in an alternator. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's JimG wrote: > > This week my batteries went dead. The alternator was not charging, only > putting out about 12V. So I put a new alternator in this evening, and I > have charge voltage, 13.8V, but the alternator is way overheating. Now the > batteries are low, but I would think it should not overheat. I isolated the > two batteries and it still gets too hot. What might cause this? > > -- > JimG > 80' CJ-7 258 CID > 35" BFG MT on 15x10 Centerlines > D44 Rear, Dana 30 Front. SOA > 4.56 Gears, LockRight F&R > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries |
Re: Another charging question
How did you start it up?
The last alternator I bought and the 'big green' (maybe the name) one my old tenant bought both say the warranty is void if you start them up on a dead battery. A new alternator cannot take that amp surge until the brushes wear in a bit, they just arc out all to crap. Arcing out means heat.... That is why some shops refuse to put a new alternator in with an old or dead battery. The battery needs a charge to break in an alternator. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's JimG wrote: > > This week my batteries went dead. The alternator was not charging, only > putting out about 12V. So I put a new alternator in this evening, and I > have charge voltage, 13.8V, but the alternator is way overheating. Now the > batteries are low, but I would think it should not overheat. I isolated the > two batteries and it still gets too hot. What might cause this? > > -- > JimG > 80' CJ-7 258 CID > 35" BFG MT on 15x10 Centerlines > D44 Rear, Dana 30 Front. SOA > 4.56 Gears, LockRight F&R > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries |
Re: Another charging question
Well I found this link and it says the alternator is not a charger.... wow!
So I am charging the batteries now and will test later. http://www.thirskauto.net/Alternator.html JimG "JimG" <jimg@cj7_2muchspam.com> wrote in message news:5Rbxb.1100$ss2.607@news01.roc.ny... > This week my batteries went dead. The alternator was not charging, only > putting out about 12V. So I put a new alternator in this evening, and I > have charge voltage, 13.8V, but the alternator is way overheating. Now the > batteries are low, but I would think it should not overheat. I isolated the > two batteries and it still gets too hot. What might cause this? > > -- > JimG > 80' CJ-7 258 CID > 35" BFG MT on 15x10 Centerlines > D44 Rear, Dana 30 Front. SOA > 4.56 Gears, LockRight F&R > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > |
Re: Another charging question
Well I found this link and it says the alternator is not a charger.... wow!
So I am charging the batteries now and will test later. http://www.thirskauto.net/Alternator.html JimG "JimG" <jimg@cj7_2muchspam.com> wrote in message news:5Rbxb.1100$ss2.607@news01.roc.ny... > This week my batteries went dead. The alternator was not charging, only > putting out about 12V. So I put a new alternator in this evening, and I > have charge voltage, 13.8V, but the alternator is way overheating. Now the > batteries are low, but I would think it should not overheat. I isolated the > two batteries and it still gets too hot. What might cause this? > > -- > JimG > 80' CJ-7 258 CID > 35" BFG MT on 15x10 Centerlines > D44 Rear, Dana 30 Front. SOA > 4.56 Gears, LockRight F&R > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > |
Re: Another charging question
Well I found this link and it says the alternator is not a charger.... wow!
So I am charging the batteries now and will test later. http://www.thirskauto.net/Alternator.html JimG "JimG" <jimg@cj7_2muchspam.com> wrote in message news:5Rbxb.1100$ss2.607@news01.roc.ny... > This week my batteries went dead. The alternator was not charging, only > putting out about 12V. So I put a new alternator in this evening, and I > have charge voltage, 13.8V, but the alternator is way overheating. Now the > batteries are low, but I would think it should not overheat. I isolated the > two batteries and it still gets too hot. What might cause this? > > -- > JimG > 80' CJ-7 258 CID > 35" BFG MT on 15x10 Centerlines > D44 Rear, Dana 30 Front. SOA > 4.56 Gears, LockRight F&R > Dana 300 w/4:1 & Currie twin sticks > Warn X8000i w/ dual batteries > > |
Re: Another charging question
Hi Mike,
I started it on the primary battery,,, it was about 11.8 V. The secondary was at 9v (I am not sure about it's quality now). Once it started I switched to both batteries. Do you think I damaged the new alternator? I only ran it for about 3 minutes till I noticed the overheating. JimG "Mike Romain" <romainm@sympatico.ca> wrote in message news:3FC5527B.71697ADF@sympatico.ca... > How did you start it up? > > The last alternator I bought and the 'big green' (maybe the name) one my > old tenant bought both say the warranty is void if you start them up on > a dead battery. > > A new alternator cannot take that amp surge until the brushes wear in a > bit, they just arc out all to crap. Arcing out means heat.... > > That is why some shops refuse to put a new alternator in with an old or > dead battery. The battery needs a charge to break in an alternator. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > JimG wrote: > > > > This week my batteries went dead. The alternator was not charging, only > > putting out about 12V. So I put a new alternator in this evening, and I > > have charge voltage, 13.8V, but the alternator is way overheating. Now the > > batteries are low, but I would think it should not overheat. I isolated the > > two batteries and it still gets too hot. What might cause this? > > > > -- > > JimG > > 80' CJ-7 258 CID > > 35" BFG MT on 15x10 Centerlines > > D44 Rear, Dana 30 Front. SOA > > 4.56 Gears, LockRight F&R > > Dana 300 w/4:1 & Currie twin sticks > > Warn X8000i w/ dual batteries |
Re: Another charging question
Hi Mike,
I started it on the primary battery,,, it was about 11.8 V. The secondary was at 9v (I am not sure about it's quality now). Once it started I switched to both batteries. Do you think I damaged the new alternator? I only ran it for about 3 minutes till I noticed the overheating. JimG "Mike Romain" <romainm@sympatico.ca> wrote in message news:3FC5527B.71697ADF@sympatico.ca... > How did you start it up? > > The last alternator I bought and the 'big green' (maybe the name) one my > old tenant bought both say the warranty is void if you start them up on > a dead battery. > > A new alternator cannot take that amp surge until the brushes wear in a > bit, they just arc out all to crap. Arcing out means heat.... > > That is why some shops refuse to put a new alternator in with an old or > dead battery. The battery needs a charge to break in an alternator. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > JimG wrote: > > > > This week my batteries went dead. The alternator was not charging, only > > putting out about 12V. So I put a new alternator in this evening, and I > > have charge voltage, 13.8V, but the alternator is way overheating. Now the > > batteries are low, but I would think it should not overheat. I isolated the > > two batteries and it still gets too hot. What might cause this? > > > > -- > > JimG > > 80' CJ-7 258 CID > > 35" BFG MT on 15x10 Centerlines > > D44 Rear, Dana 30 Front. SOA > > 4.56 Gears, LockRight F&R > > Dana 300 w/4:1 & Currie twin sticks > > Warn X8000i w/ dual batteries |
Re: Another charging question
Hi Mike,
I started it on the primary battery,,, it was about 11.8 V. The secondary was at 9v (I am not sure about it's quality now). Once it started I switched to both batteries. Do you think I damaged the new alternator? I only ran it for about 3 minutes till I noticed the overheating. JimG "Mike Romain" <romainm@sympatico.ca> wrote in message news:3FC5527B.71697ADF@sympatico.ca... > How did you start it up? > > The last alternator I bought and the 'big green' (maybe the name) one my > old tenant bought both say the warranty is void if you start them up on > a dead battery. > > A new alternator cannot take that amp surge until the brushes wear in a > bit, they just arc out all to crap. Arcing out means heat.... > > That is why some shops refuse to put a new alternator in with an old or > dead battery. The battery needs a charge to break in an alternator. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > JimG wrote: > > > > This week my batteries went dead. The alternator was not charging, only > > putting out about 12V. So I put a new alternator in this evening, and I > > have charge voltage, 13.8V, but the alternator is way overheating. Now the > > batteries are low, but I would think it should not overheat. I isolated the > > two batteries and it still gets too hot. What might cause this? > > > > -- > > JimG > > 80' CJ-7 258 CID > > 35" BFG MT on 15x10 Centerlines > > D44 Rear, Dana 30 Front. SOA > > 4.56 Gears, LockRight F&R > > Dana 300 w/4:1 & Currie twin sticks > > Warn X8000i w/ dual batteries |
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