So Ken, now ya got me all confused, those numbers don’t jive with the generators I have on the generators on the bench here or the numbers I have access to. I did some searching through the Chevy parts books this morning to try to make some sense out of it..
This is the generator that is tagged “Factory Authorized Rebuilt Generator” Mod 72U-11F2 Code. Pic: http://rides.webshots.com/photo/2526278320098611668YDvrlt
It has the one-piece aluminum CE end frame with the blind hole for the bushing. And a cast iron DE end frame. Parts book shows the (72-U) as 1940-48.
This is the generator that is tagged “Delco-Remy” Anderson, Ind., Automotive Electrical Equipment. Model 1102667 Serial 75517. Pic: http://rides.webshots.com/photo/2869306830098611668cphpus
It has the cast iron CE end frame with the outside cover plate for the bushing. Thru a couple of revisions the Parts book shows the (9-U) as 1949-52.
So how can the second one tagged 667 have the cast iron end frame if 1939 was the last year for it? And if the 1102667 was used from 1940 and up and had aluminum CE and DE end frames how do you account for this one having both CE and DE end frames of cast iron?
Parts substituted - 1102667 Use 1102672 rev.date 4-1-49, 1102672 Mix w/1102737 rev.date 3-1-50
Chevrolet Parts Book listing,
For the 1940-48 ALL pn.1102737 (72-U)
For the 1949-52 ALL pn.1102719 (9-U)
Yes, the 1909109 CE frame appears to have been replaced by 1913990 fits 1938-52 ALL. It doesn’t say but it sounds like they just replaced all the cast open-ended frames with the aluminum frame w/bushing. The Delco-Remy service bulletin says that you should replace the aluminum frame if the bushing is worn.
Ps. Also to I made some corrections to an earlier reply concerning the armature thread, taint as bad as it sounded.