All I can find in the few parts books I have is the 5B595 & are the upper rod brg. shells for a D4 7J1 to 7J409 The 2F1083 bearings I can,t find anything on them but the numbers does sound kind of familiar.Some day if I get over to the shop I,ll see if I can get an NPR catalog that has all parts numbers for anything Cat made up to the time of the printing of it.In these later years everything now is on the computer but the first change was on fische.
Here's some info on bearing numbers.