9700 alternator question?

Larry B. 1486 · Jul 25, 2013

Been working on our 9700 for about three weeks all different problems and today getting ready to use it and the alternator locked up. I know it's going to be a cheap one, lol, but was wondering if a GM alternator will work? I have a good used one in the shop and if so, does anyone know how to wire it up? It has one wire that charges and a plug with two prongs. All help appreciated.

JMOR · Jul 25, 2013

RodinNS · Jul 25, 2013

If you've got the Motorolla alt with the regulator mounted under the right step... it's dead simple to hook up the Delco.
To mount the alternator... grind some relief into the mounting bracket so the fat delco will make a full pivot. Once it's mounted... find the BAT wire and the indicator light wire in the harness. Hook the large bat wire to the BAT terminal on the alt and while you do that run a jumper to terminal 2 on the alt. Then get the indicator wire and hook that to terminal 1. I think I got terminal 1 and 2's functions correct. If not, reverse them... Then hook a case ground to the alternator and somewhere on the chassis of the tractor simply so it doesn't rely on the pivot bolts for ground. Tape up the field wire in the harness so it doesn't short out... then unplug the old regulator. You're done. That simple. You'll possibly need a different belt and pulley for the alt depending on what you have. Just MAKE SURE you get a 1/2" 'B' belt to drive it or it will slip.

Rod

Larry B. 1486 · Jul 25, 2013

Thanks Rod. That's exactly what I need to know. I have other question. You said the regulator is under the right step. It's outside the cab? Is it close to the battery, like over the battery and just a square black box? Appreciate it.

RodinNS · Jul 25, 2013

I'm not really sure on that tractor... Many had it on the backside of the front rail of the right side step. Swing the battery tray out and you should see it IF it's there. I'm just saying this because most flat deck tractors had the regulator there while straddle mounts had it on the firewall behind the battery. Again... this is assuming that it had a motorolla alt with external reg. It could also have a lucas with internal reg or who know what else... The configueration I described should have been standard on a 'C' prefix serial number with a 'Q' cab. The reg should be a silver box about 2" square with 'Solid State' on the tag if it's still got a tag...

Rod

9700 alternator question?

Larry B. 1486

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JMOR

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RodinNS

Well-known Member

Larry B. 1486

Member

RodinNS

Well-known Member

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