212 Diesel Grader Precup Oring Part# verify

I have a 1939 212 diesel motor grader, D3400 engine, serial number 1R565, I rebuilt head, and I need precup orings and copper crush washers. I found these part numbers,

1A2298 oring
4B5647 copper crush washer

But can't verify bc I don't have parts diagram. Florin tractor has them, but I wanted to be sure before I ordered.

Thanks!

Both those numbers are available from Cat $3.30 for the O-ring and $2.09 for the copper washers.

Appears those are the correct part numbers but I'm using equivalent D2 3J for 1941 parts book.

You guys are awesome! Thank you so much.