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Installing Alternator on my H

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Zonie

05-01-2001 23:01:46

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I just got done mounting a Nippon Denso Alternator ( approx. 4 " in diameter, much smaller than the Delco I was trying to fit! ) on my 48 H. I t was super easy to fit, except the wireing leads would have been too close to the hood. I had to disassemble the alternator, and remove the stator and turn it 90 deg. and reassemble it now the wiring leads point down and I have lots of room for adjustment. the Alternator bolted to my old generator mount with a 1 1/2" spacer to line up the pulleys, the uper bolt lines right up with the bolt hole in the thermostat housing so the adjusting bracket is easy to fabricate. the original belt looks as tho it should be an ok fit. Now all I have to do is get the wiring figured out.It has a 3 wire plug with the terminals marked IG, S, L and then there is also the big terminal for the battery lead.
I'm thinking the IG should go to the ignition some how. but I have no idea what to do with the others. my buddy who works in a alternator shop tried to tell me but his engilsh is very poor and I got lost in his telling me how to hook it up.
He said he would come by to show me. I'll post how it hooks up later. Anyone out there with good english that can help me out???
The hardest part of this has been taking the alternator apartand reassembling it with out damaging it or looseing the small parts.
My buddy told me that this alternator is the one all the drag racers want because it is so small and light.
I'll post some pictures when I'm finished and a wiring schematic when I figure it out....if that ever happens!!!

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Tyler(WA)

05-02-2001 08:31:57

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Re: Installing Alternator on my H in reply to Zonie, 05-01-2001 23:01:46

Did the same thing with my MF-2135. The Delco was too big but the ND was the same diameter as the generator I replaced.

Slick

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Bob M

05-02-2001 04:48:41

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Re: Installing Alternator on my H in reply to Zonie, 05-01-2001 23:01:46

Zonie - I'm going from memory here, but I believe this is how the Denso alterator gets wired up:

IG = to switched 12 volt (from the ignition switch)
S = voltage sensing - connect to the big output terminal
L = to warning lamp

I don't recall if the other side of the warning lamp is to be grounded, or must be supplied with 12 volts. But you can figure quickly by trial and error.

Post back a photo of your setup - it sounds pretty slick!! ...Bob M

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Zonie

05-04-2001 06:59:31

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Re: Re: Installing Alternator on my H in reply to Bob M, 05-02-2001 04:48:41

Thanks for the help. Your memory is right, I did get it wired. and functioning properly. It's nice to have a charging system that works.
For now, I have the alternator IG wire wired thru my light/ charge switch. My tractor has the magnito and the on off switch only grounds the mag out to kill the ignition, so I could not use that switch I just have to remember to turn the light switch on for it to charge and to shut it off when I'm done.
I guess I'll wire in a 2 pole relay to kill the alternator and ground out the mag at the same time since my memory isn't so good these days.

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Bill R

05-01-2001 23:18:10

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Re: Installing Alternator on my H in reply to Zonie, 05-01-2001 23:01:46

Hi there
I have had a delco alternator on my H fo a few years.I have just this week installed a new battery and alternater, and i am working on the wiring as well.my new alt is a delco as well
On the big positive post with the nut I put a wire directly to the battery.From the number two terminal I ran a wire to my ignition switch, I am not sure what to do with the number one post,I am thinking posibly a amp meter with the wire going through the ignition switch so it is not drawing power when the tractor is not running.
Keep us posted
Bill R

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Bob M - w/diagram for Bill R

05-02-2001 07:06:51

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Re: Re: Installing Alternator on my H in reply to Bill R, 05-01-2001 23:18:10

Bill - If you've got a Delco internally-regulated alternator, the diagram above shows how it should be wired up.

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