Interchangeability... Sop far, only the brakes are interchangeable between the 14 bolt and the Eaton. I have seen a lot of requests for part numbers and how-to's for the Eaton brakes. Well, here is my how-to rebuild the brakes on the HO72 and HO52. NOTE: for the 71 and 72 HO72/52 axles this is a direct swap. 70 and earlier use smaller wheel studs and will require a hub swap, or the holes on the hub to be enlarged.
Eaton left 14 bolt right
13 inch 14 bolt backing plate assembled and bolted to HO72. Perfect fit.
This is the one issue with this swap if you are performing it on a 70 or earlier axle. from left to right early Eaton stud, 71-72 Eaton stud, 14 bolt stud.
I went ahead and installed the 13 inch drum on a 69 hub with the small studs for this demo. you will notice the that flanges of the larger drums are also thicker. The studs stick out just 13/16". The drum center fits perfectly over the hub. I would not recommend running the brakes this way without using a spacer between the studs and drum, or enlarging the hub to use the larger studs.
Bam!
