pb50
According to the Fram Oil Filter cross reference guide, Baldwin B2 can be replaced with Fram PH8A.
fram ph28a
Fram Ph3593a
The Baldwin filter is a BT223 You can go to http://catalog.baldwinfilter.com/ and enter your filter number to get a Baldwin number.
The Fram Oil Filters cross reference guide lists Fram PH8170 for Baldwin B7165.
The Fram number is P1654A
According to the Fram Filters cross reference guide, Baldwin PA-634 can be replaced with Fram CA101.
Ph7405A
Fram PH2.
Fram P3317 and Baldwin BT341
PH16
Fram does not have a filter that will cross-over. Baldwin filters cross over for HHTA0-59900 would be a BT9358. I would recommend NOT using Fram filters on your Kubota. Use Kubota, Wix or Baldwin filters.