[Farmall] Cub experts

[szabelsk at gdls.com]

DBigdog,

I would agree with you on that point, except that (assuming the part 
numbering system that was used released part nunbers in ascending order) 
the 351508R2 panel would have been designed before the 354912R92 panel, 
not after as a temporary replacement. 

Maybe it was the first panel idea, it got scrapped, but them got 
resurrected to fill a need like you indicated?

By the way, I took a look at the pages that were provided addressing the 
designation. It pretty much follows what we've always seen in the older 
army drawings, with the exception of the two digits after the R. If we saw 
R22, it meant 22nd revision, not 21st. That's why I guessed R92 was the 
92nd revision even though I can't ever remember seeing one that high 
before.

Maybe the army made some changes to the numbering system but IH continued 
with what they had already set up? After all the standard was meant to 
address hardware that was only common to a particular company, not the 
entire world. That would have taken a great deal of  work to make 
everybody have the same common part number.  IH and JD, for example, would 
have had to put their heads together and make their nuts and bolts have 
common part numbers, And whose number system would have been used?

The army doesn't use numbers any more for revisions. We start with " - " 
for the first version, followed by A, then B, and so on. When we hit Z, we 
start over with AA, AB, AC,......   We don't tag on the revision number to 
the part number when we order parts. It's understood that they supply to 
the latest version of the drawing unless otherwise directed. 

Also, the first four number are related to program/projects, the last four 
are assigned in order of drawing development. We can, however, assigned 
-1, -2, .......-999 to the basic number, if it's a tabulated drawing, like 
for bolts. We make a basic bolt outline with reference designation instead 
of hard numbers, then create a table for every size bolt that the drawing 
is supposed to cover, and add in all the pertinent information that is 
needed into the table columns. 

Maybe somebody will run across a copy of some old IH directive memorandum, 
and the answer to the panel question will be known. 

Carl Szabelski