04-01-2022, 06:24 PM
Further investigations. 
March or July 1938 the back axle hub bearing changed to larger 2K5678, 35MM X 72MM X 17MM which for the sake of convenience of interchangeability was reflected in the change of the front hub to take the same larger bearing. This is presumed to be hub 1A4074 change to 1A4462 BUT both 7 and big 7 spares list still show the smaller bearing 1.25 X 2.75 X 0.6875 and the same felt carrier (we call the inner hub)!!!! The felt carrier should have been a different part since it houses half the outer diameter of the larger bearing.
It looks like the spares list never fully caught up with the changes??
Has anyone got one of the larger bearing hubs that they would measure the seal housing I/D with an internal mike to let us know the size and also the smaller bearing hub seal housing I/D to compare.
I am wondering if this is the cause of the new lip seal not going into the earlier smaller hub?? Or are both hubs turned to the same felt seal holder diameter??
I have not even begun to look at the stub axles which would also have to have changed to a larger diameter.
Dennis
March or July 1938 the back axle hub bearing changed to larger 2K5678, 35MM X 72MM X 17MM which for the sake of convenience of interchangeability was reflected in the change of the front hub to take the same larger bearing. This is presumed to be hub 1A4074 change to 1A4462 BUT both 7 and big 7 spares list still show the smaller bearing 1.25 X 2.75 X 0.6875 and the same felt carrier (we call the inner hub)!!!! The felt carrier should have been a different part since it houses half the outer diameter of the larger bearing.
It looks like the spares list never fully caught up with the changes??
Has anyone got one of the larger bearing hubs that they would measure the seal housing I/D with an internal mike to let us know the size and also the smaller bearing hub seal housing I/D to compare.
I am wondering if this is the cause of the new lip seal not going into the earlier smaller hub?? Or are both hubs turned to the same felt seal holder diameter??
I have not even begun to look at the stub axles which would also have to have changed to a larger diameter.
Dennis