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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.

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...

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...

Awesome! Thank you. I ordered this pulley. 2.37in diameter with 8 grooves (more flexibility for belt alignment) and a 0.875" diameter to match the 21SI alternator. Keeping my fingers crossed...

If you have that info, it would be helpful for me to find a pulley diameter close to stock so I can get the speed range close.

Thanks. That was my understanding as well. It's a 24V unit, and the increased current rating should make it easier to find a pulley to work as I won't have to be as specific on alternator speed to get enough charge. I'll go ahead and order this alternator to see if I can get it to line up...

But would that be an issue?

any reason this alternator wouldn't work? It's a highly available unit that has serpentine pulleys readily available. I know the vehicle guys use these on the M998 and M35 units. It's a single wire alternator, so should be easy to incorporate into the charging system. Is there anything...

Thanks folks. I'll keep looking. Looks like I may have to get creative and retrofit an alternative 24V alternator into the unit.

Hi Folks - I just picked up an MEP-803a, but it doesn't have an alternator (or pulley, of course). I've been able to find multiple sources for the alternators, but haven't had any luck on the pulley. I've searched the forum, and the sources I've found via search seem to be out of stock with no...