Bumper Arm A-17754-D vs. AA-17754-B difference?R
 

We are working on a 7/28 AA truck that came in as a basketcase, and it does not have a front bumper or bumper arm, ...and it appears we do not have any (correct) front bumper brackets. I realize this was an option, but if I am going to modify a passenger vehicle set, where does it need to be lengthened, and by how much?

Re: Bumper Arm A-17754-D vs. AA-17754-B difference?R
 

Page E-34 of the Standards "Front bumper arms were the same as for the A chassis
through December 1929." Is this information incorrect?


I looked on the MAFFI site and the drawing date for AA-17754-BR 7/10/1930
It's not shown in the 12/1/1929 parts book.



Bob

Re: Bumper Arm A-17754-D vs. AA-17754-B difference?R
 

Thanks Bob, I don't know. Is there any EIs listed on the MAFFI page that would show how many revisions? The PPL from 1931 shows a listing on them as being for AA.

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https://www.fordbarn.com/forum/attac...1&d=1570568860


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Re: Bumper Arm A-17754-D vs. AA-17754-B difference?R
 

There are two EI's 17085 7/10/1930 and L-4132 9/23/1946
http://www.maffi.org/WSContent/PartsSearch.php


Bob

Re: Bumper Arm A-17754-D vs. AA-17754-B difference?R
 

Might want to get with Neil Wilson on this one so you are not guessing. he may have the answer you need.

If you have all of Neils research (The Double Aer)...You may find your answer here:

FRONT BUMPER
AA-17750-B: Front Bumper Assembly (Solid)
MAN/22/1/13 (1975)
“Discussion On Bumper Arms”: TDA/April/3-4 (2001)
“TQA”: TDA/April/7 (2010)

AA-17754-A, B: Front bumper arm—R.H.
“TQA…Usage and differences”: TDA/April/3 (2001)

AA-17755-A, B: Front bumper arm—L.H.
“TQA…Usage and differences”: TDA/April/3 (2001)



Pluck