Prestolite Alternator Brush Holder P/N

[TangoTango]

I have a Prestolite ALU-6421 alternator on my IO360-A3B6D, and while investigating a loose field wire I managed to break the F1 field stud. This stud is riveted to the brush holder assembly so now I'm looking for a whole new brush holder assembly.

Since Prestolite has been bought by Hartzell, I'm having trouble finding any paperwork indicating the correct part number for this assembly. It looks like Hartzell sells a brush holder assembly that replaces "any aircraft utilizing ALE, ALH, ALT, ALU, ALX, ALY, and ALZ series alternators":

Hartzell Engine Tech Brush Holder Assembly Alu-3045Bs | Aircraft Spruce ®

Can anyone provide any paperwork or personal experience confirming this is the correct assembly for the old Prestolite units before I order it? Thanks!

[PT20J]

Why not just call and ask:

Hartzell Engine Tech
2900 Selma Highway
Montgomery, AL 36108, USA

8 a.m. to 5 p.m. CST
Monday thru Friday

Customer Support
+1 (888) 461-6077 Toll Free
+1 (334) 386-5400 Phone

[N201MKTurbo]

They have changed that brush holder 3 or 4 times. All the brush holders will not work with all the brushes, but if you buy a brush holder and it’s compatible brushes, it will work on any of those alternators. I would suggest buying the latest brush holder and a new set of brushes.

[TangoTango]

I had to wait until Monday to call Hartzell, but I got their answer: The phone number @PT20J gave above is good, and according to Hartzell the latest part # that fits the Prestolite ALU series alternators is the ALU-3045BS. They also said the older ALU-2045BS brush assembly would work as well, but the 3045 has been redesigned with longer brushes.

@N201MKTurbo per your advise I asked about brushes while I had Hartzell on the phone, and they said the ALU-3045BS assembly comes with new brushes so I should be good to order the one part number and replace everything with new.

Thanks for the help!