svrunyan4075
Member
I have a new battery in my 8n and the battery is being drained when it is off. I was curious how the battery should properly be wired so it doesn't get drained and does get charge?
Thanks!
Thanks!
Google "wiring diagrams JMOR " and find the diagram that fits your tractor.
I would take the alternator to a shop and have it checked out.(quoted from post at 13:14:33 06/20/17) I have a new battery in my 8n and the battery is being drained when it is off. I was curious how the battery should properly be wired so it doesn't get drained and does get charge?
Thanks!
saw it on the internet, so it must be true", right?(quoted from post at 19:04:06 06/20/17) I agree with all above posted .... A bad diode in the altanator could cause it. Have it checked.
If you bring it to a auto place to have it checked make sure you tell them it's a tractor not a car. Tractor altanator looks just like a car one but the difference is the tractor altanator field excites and charges at only 500 rpm whereas automotive alt begins charging at 1000-1200 rpm.
One last tip... I put battery shutoff switches in all my tractors. Helps with long term storage and can help prevent a battery drain if you have a problem. You have to get a heavy duty one though that is rated for a lot of cranking Amps ... Not the Mickey Mouse shutoff switches they sell at HF.... I get mine it's a knife type switch from NAPA.
(quoted from post at 19:38:23 06/20/17) I just put one off of a car on my 8N, works great :wink:
t what alternator rpm it begins charging has to do with the VR and even though there are a dozen or two variants, none are sold as 'tractor' or 'auto' VRs. As to engine rpm, that will be most dependent on what pulley size is used on the alternator. Doesn't really matter whether "said on internet' or 'heard from someone' or as on CNN & MSNBC, 'heard from a reliable source'.(quoted from post at 20:38:23 06/20/17) I just put one off of a car on my 8N, works great :wink:
es, with one exception. It needs one of 3 items inserted between the key switched power and alternator terminal #1, so as to prevent alternator from feeding back power to the coil when shutting down, otherwise engine will keep on running when you switch off ignition. 1) a resistor ( GM used 10 Ohm, 6.25Watt resistor in parallel with "idiot lamp" , 2) a diode with current rating of 3amperes or more, 3) a small lamp ( many will work, among the popular is the 194 used in side marker lights).(quoted from post at 08:29:12 06/21/17) Hi and thanks everyone!
I do have a question for JMOR but it appears overall that I need to have the alternator checked and possibly replaced. My question for JMOR
would be whether this diagram appears correct for a 3-wire alternator hookup?
I will check the alternator and re-wire for the 3-wire setup if this appears to be correct.
Thanks again. This is a great discussion group. Always very helpful.
vrunyon, I'll ride with soundguy & Jim.(quoted from post at 16:06:51 06/21/17) You describe normal operation of the alternator.
That doesn't mean that the alternator is not the source of the power drain.
souNdguy explained how to test for this when he said "Disconnect alt and put a test lamp clip on that wire, and probe to alt charge lug. IE, test lamp in series. If lamp dimly glows, alt is bad and leaking."
'Course, the power drain could still be something else...
(quoted from post at 16:04:06 06/20/17) I agree with all above posted .... A bad diode in the altanator could cause it. Have it checked.
If you bring it to a auto place to have it checked make sure you tell them it's a tractor not a car. Tractor altanator looks just like a car one but the difference is the tractor altanator field excites and charges at only 500 rpm whereas automotive alt begins charging at 1000-1200 rpm.
One last tip... I put battery shutoff switches in all my tractors. Helps with long term storage and can help prevent a battery drain if you have a problem. You have to get a heavy duty one though that is rated for a lot of cranking Amps ... Not the Mickey Mouse shutoff switches they sell at HF.... I get mine it's a knife type switch from NAPA.
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