MEP-803A Alternator and Pulley

[Farmitall]

Ok, got the alternator on and bolted up.

Needed a slightly longer belt. Got a 4040365, but a 4040360 would've been better. 1/2" bottom bolt with grade 8 washers for spacing. 8 groove HD truck pulley. Everything seems to like up.

Now it's time to connect the wiring. I have four wires that look like they were connected to the old alternator. Any way to trace what goes where? Battery, exciter, ground and ?


View attachment 900997View attachment 900998

Yes, the schematic.

 

[kloppk]

 

[CaryHenry]

View attachment 901024

Thank you! The struggle I have is the wires on my gen don't seem to be labeled, so I'm assuming some probing is in order. Ground is fairly straight forward. Regarding the two connections on the bat terminal, if I have batteries and back probe those, should I see power when the system is off. Similarly, for the exc, I'm assuming I should only see power when the switch is set to run?

 

[Light in the Dark]

The wire numbers should be printed in red ink every couple inches, on every wire in the machine. You may need to clip free a zip tie to see what I mean.

 

[CaryHenry]

Ah. Ok. I'm used to the aluminum tags on the vehicles, so I wasn't looking for numbers actually printed on the wire. I'll take a look this evening.