H 12v alternator?

Thanks Ken

This alternator is 4 1/2" in Dia. and 7" in length and will go right on the orginal mountings on the tractor. Use an 8" x 3/8" bolt and some pipe for spacers. Being Hitachi means that it is METRIC You will need to drilll out the mountings to 3/8". The tension adjusting bolt is also metric thread.

This alternator is a three (3) wire set up which can be easily converted to one (1)wire. There are spade conections labled S & L and a BAT conection. The L spade is for the idot light and can be disregarded. Use a jumper wire from the S spade to the BAT post and your are good to go.

The pully is a split type that you can widen using a spacer (once again METRIC). You will need to use a disc type lock washer and some locktite because there won't be room to reuse the split lock washer that comes with it.

There is a built in regualtor and a resister to keep the battery from feeting back to the alternator. If you want the alternotor to start charging without having to accelerate the engine you can install a resistor or idot light to feed the L spade.

This is a sweet fit under the hood of H's, M's, W's also Cubs and many others.

GOOD LUCK

Thanks

bwood

Punch below for a wiring diagram for a 10 SI/magneto setup. There's other, much smaller alternators that will fit easier under an H hood (Nippon Denso, etc.) but I don't have any wiring diagrams...

• 10 SI/magneto diagram

Go to this link. It gives a good detailed description of the newer (1986-1996) Delco alternators. I hope this "URL thing works - I've never tried it befor.

www.alternatorparts.com/cs130_sbpage1.htm

BAT: This is the main battery terminal. It is the same on all alternators. The Delco 10SI, the Delco 121/130 series, the Nippondenso alternators.. Hitachi.. etc.

S: The sense terminal. This is pin 2 on the 10SI. Connect this either to your battery, or the alternator BAT stud. On the Delco 121/130 series alternators, this terminal will usually be under the rubber packing. You need not connect it on the 121/130 Delco - this alternator uses internal sensing. I break out this terminal and use it only when I am using two batteries and a battery isolator.

I: The exciter (ignition) terminal. This is pin 1 on the 10SI. Connect it to your ignition switch. You may or may not need a diode, depending on the alternator. On the 10SI, you can use a diode or lamp configuration.

L: The indicator lamp. You don't need to use this terminal. Attach a warning lamp here, as you would on a 10SI, if you wish.

This is a quick and dirty run down of the various terminals. There's really not much difference between one alternator or the other. The 10SI is the most popular because of the price. I suspect that the Delco 121 or 130 alternators should be inexpensive too - they started using them in about '85, right after the discontinued the 10SI. I don't know the physical size of the 121, but it might be smaller than the 10SI. I know for certain that a Nippondenso for an old mid-80s Toyota will be smaller.