Ford 1700 Hitachi alternator

Anonymous-0 · Jul 15, 2008

The alternator on my 1979 Ford 1700 is not charging properly so I took it to the local autoparts store to be tested. They determined the alternator was the same as a 76 Nissan Pickup truck with a 4 cyc 2.0L engine. Looks just like the original one on my Ford 1700. The repair book i have states this alternator came in a 20 amp and 35 amp. The alternator the parts store is reccomending is a 35 amp style. How do I tell what amperage my original non-working alternator is and does it matter if it is a 20 or 35 amp? My original alternator part number is a Hitachi LT120-07 and the parts store wants to sell me a Duralast 14105. Any help would be greatly appriecated.

RodinNS · Jul 15, 2008

I would suspect that the original was 20 amps. Unless you've got a bunch of lights added to the tractor you don't need more than that. All the same, the 35 amp won't hurt anything so long as it fits.
I generally install a 63 amp Delco 10si on my tractors when the original fails. I don't think the 10si will fit on your tractor due to it's body size though... so if the 35 amp will fit, stick it on there.
The only other thing I might do is upgrade the Bat wire from the alt to the starter terminal if it isn't 10ga or larger already. It should be tho...

Rod

Ford 1700 Hitachi alternator

Anonymous-0

Well-known Member

RodinNS

Well-known Member

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