In Reply to: Cast Iron Front Mount Distributors???? posted by Farmer Dan on October 21, 2018 at 17:52:25:
The July, 1947 MPC (the 1st 8N parts book) nor any previous issue, shows or lists a breaker dust cover, p/n 9N-12276. The May, 1949 MPC does show and list it. Ditto too for the May, 1950 MPC. Now, on John Smith’s now archived Tractor Site, in “Tractor ID/HISTORY” he states that the dust cover wasn’t added until 1951 at or around s/n 403489. I usually agree with most everything John said on these N’s, but not this time. The MPC’s would have pretty much the definitive info listed. In addition, the ’51 models now used the angle mount unit, but, since the dust cover was released earlier, it was just a new part to be used with all the previous model years using the front mount tractors from ’39 thru early ’50. Note it carries the ‘9N’ part prefix, and designates used “…’39 – ’49…”. That is because it would be first used on the 9N module, (p/n 9N-12200 ass’y) beginning in 1939. In April, 1950, at s/n 263844, when FORD went to the angle mount distributor, there was no breaker dust cover. The FAA-12239 dust cover was added on the NAA side distributor.