I previously posted photos of an old IHC harrow which I'm rebuilding and wanted to ID. The consensus was that it was a model 9-A, 6 ft. wide. I then obtained an original Owner's Manual for 9A & 9B dated 5-29-47. There is certainly a lot of similarity and I know that many details are upgraded during the life of the model run.
The most significant differences are the scraper blade mounting and the bearing housings. The scraper blades on mine are through-bolted onto a round pipe vs. the 9A where they are attached with U-bolts. Also I don't have the adjusting lever or spring as shown in the manual.
The bearing housings and mounting brackets in the 9A parts list are a different design than the parts used on my unit. Doing a little research I found that the parts I have are the same as were used on the Farmall 23A harrow. I believe the 23A was produced in the 50's or 60's.
So all of this suggests that my harrow might be the successor to the 9A. Anyone know what that was? Or do I just have an example of a later version in the model run of 9A's.
The most significant differences are the scraper blade mounting and the bearing housings. The scraper blades on mine are through-bolted onto a round pipe vs. the 9A where they are attached with U-bolts. Also I don't have the adjusting lever or spring as shown in the manual.
The bearing housings and mounting brackets in the 9A parts list are a different design than the parts used on my unit. Doing a little research I found that the parts I have are the same as were used on the Farmall 23A harrow. I believe the 23A was produced in the 50's or 60's.
So all of this suggests that my harrow might be the successor to the 9A. Anyone know what that was? Or do I just have an example of a later version in the model run of 9A's.