Alternator Woes

[Chris Cash]

The alternator on my 5040 is dead. I have jumped it off so many times I have killed the cells in the battery. I have had people tell me that the alternator is the same as the old GM alternators. Does anyone know this for sure? Any help would be appreciated.

 

[Bob]

<img src = "http://ndtc3500.stellarnet.com/~blweltin/Bob/AlternatorHarness.jpg">

If it looks like this, it's a Delco 10SI, as used on 1975 - 1985 Chevy pickups, for example.

Does the tractor have a 3rd small wire (for the tach) connected to the same area as the 2-wire connector in the photo, or to a terminal on the back of the alternator? If so, the tach won't work unless the replacement alternator has a provision for the tach wire.

 

[Chris Cash]

Yeah, mine has three wires.