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Harry Ferguson Tractors Discussion Forum
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Re: Alternator Question

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08-23-2013 10:14:26

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I'm not trying to do anything except figure out if my alternator is going bad or if I have my wiring screwed up. I don't understand how my tractor will run and not charge the battery at the same time. That was my question, not if I can unhook something and operate the tractor.

If anyone has a wiring diagram for a TO-20 with a 3 wire alternator, I would appreciate seeing it.

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Jason S.

08-23-2013 11:03:02

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 Re: Alternator Question in reply to jcmorgan31, 08-23-2013 10:14:26  
Here is a diagram for a Delco 2 wire on a Ferguson. Most people use a 10Si alternator when they convert them. As far as your problem, is it possible for the tractor to run and not charge the battery? doesn"t take many amps or volts to fire a points distributor. That"s the only draw on the alternator while it"s running unless you have the lights on.

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08-23-2013 12:06:19

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 Re: Alternator Question in reply to Jason S., 08-23-2013 11:03:02  
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Thanks to all for the info. I just got back from O'reillys and the old alternator wouldn't run in the tester for 5 seconds before shutting off the machine and issuing a "fail". Bought a new one.

I'll put this one one and see what happens...

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Jason S.

08-23-2013 12:28:17

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 Re: Alternator Question in reply to jcmorgan31, 08-23-2013 12:06:19  
So why the pics of the Dearborn 14-15 top link bracket? Are you trying to put one on your Ferguson?

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08-23-2013 12:58:31

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 Re: Alternator Question in reply to Jason S., 08-23-2013 12:28:17  
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That was my plan. Will it not fit?

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Jason S.

08-23-2013 13:53:48

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 Re: Alternator Question in reply to jcmorgan31, 08-23-2013 12:58:31 long as you have that top link bracket and the lift arm extensions it will fit fine. I have one I use on my TO-20.

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08-23-2013 14:01:49

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 Re: Alternator Question in reply to Jason S., 08-23-2013 13:53:48  
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Well, my father mowed with the 14-15 on his TO20 for years without the top link bracket, the extensions or the correct under axle bracket. My father passed away this fall and I inherited all his equipment. I cut the field with it back in June and it was a pain so I started reading and learned about all the missing brackets. So far I've found the correct under axle bracket with the ball socket and the top link bracket. No luck on the extensions yet, but I'm still lookin.

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Jason S.

08-23-2013 15:45:43

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 Re: Alternator Question in reply to jcmorgan31, 08-23-2013 14:01:49  
Most people just make the 8 3/4" extensions. I got lucky and found an original set for mine. I have hooked mine up once without the top link bracket and extensions and it was way harder to hook up than it would be normally, plus I lifted mine up and it jammed the lift and wouldn't come back down. If you have all the parts you can hook that mower up in about 5-10 mins. The biggest thing I have found is to have the left hand side of the mower sitting on a piece of a 2x4 so it is a little higher than the right hand side and take the right hand check chain loose until you have the mower installed and then hook it back up.

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