Looking for front idler bearings and races for a Big Twenty. Looking for NOS parts, stamped part numbers are hard to individually cross due to the lack of information today. I am unsure if there is someone who might have some further information referencing Hyatt and if they might have another Hyatt number for the complete bearing and race assembly. I have had no success locating these bearings through the normal channels and parts suppliers noted in the website supplier list.


Cat Part and Hyatt part numbers:

1B-3793 Roller Assembly / Hyatt stamped number 7140
1B-3794 Race (Outer) / Hyatt stamped number 4458
1B-3795 Race (Inner) / unknown Hyatt number

Have you tried measuring them and trying to match dimensions? I'd bet that there's a more modern bearing with the same or very close dimensions that could be made to work even if the numbers woln't interchange. May not be truly original but is something to try.

I have been to the bearing supplier locally and they were unable to match the bearing with their suppliers.

You could always make some bushings,many old cats had factory bushings in the front idlers.

1B-3795 = Hy 30611

Scan below covers the Part No range. There are some 7 pages to this chart.
Cheers,
Eddie B.

Thank you for posting and the cross reference chart. Much appreciated!