MA mirror arm?

[ccdoran]

Hi Guys,

I just trailered this jeep home and on the way I noticed this mirror arm. I believe it resembles an MA arm. I thought that it was odd. Any ideas?



Thanks,
Chris

[jeepmb]

Hi Chris,

it should be an MA mirrow arm......

Best Regards,

Luigi

[wayne douglas]

Hi Chris - I think you will find that GMC's had the same mirror arm with the hex nut.

[ccdoran]

Hi Luigi and Wayne,

How might one identify an MA mirror arm and how would it differ from a GMC arm?

Chris

[wayne douglas]

Sorry Chris I dont know the answer to that one

[Ladislav]

I think it is MA arm. I have the same.

Ladislav

[mr rusty]

Looking at John Farleys book it would seem it was used (for how long) on very very early slatties as well as the MA. Not sure about it being correct for GMC's - would have thought the arm would be possibly twice as long?


Pete

[Joe Gopan]

It is late 60's era M-Series, earlier , including WWII has a "Set Screw" for adjusting the length. This may be M-151 or M-715.

[Ladislav]

The mirror arm on M-151 is down asymetric (aroud the drilling for bolt), on the MA is symetric. This is not visibal on this picture. It were nesessary to take the arm down from vehicle. On MA there is no adjusting screw, the adjusting happens through the hexagonal nut.

Ladislav

[Joe Gopan]

I still disagree, the MA has a set screw.

[mr rusty]

Ben

John Farleys' book 'The standardised War-time jeep' shows this mirror arm on page three and states it has a 'hexagonal locking nut' for adjustment.

Ben can you supply a picture of the mirror arm you are describing as being correct for a Willys MA with a 'set screw'? While you are at it can you supply a pic of the M151 version?

Maybe we will all be wiser.

Pete

[Joe Gopan]

Not at my library right now, but go to TM10-1513 , July 1943, Master Parts List and refer to Group 2201, Rear View Mirror Assy for MA/MB, it lists same Mirror assy Part Number and we all know how the arm length adjustment for the MB is a Set Screw. I believe you will see clear photos of an MA in Davir Doyle's "Pre Standardized Jeep-Walk Around". Note the MA Mirror Arm havinga "Set Screw". There are many publications out there with original WWII MA Photos, take a look and teel me what you find.

[ccdoran]

Hi Guys,

Here is a better pic of what I have. I have removed it and sandblasted it. The wider tube (on the left) is about 7 inches long, and the nut is 7/8. The hole on the left is about 7/16 and the one on the right is about 1/4 inch. I too was under the impression that the MA arm was without a set screw, hence the tightening nut, but I'm still learning about these things.



And a little bit bigger

[Joe Gopan]

Still looks M-715 era to me.

[ccdoran]

I still disagree, the MA has a set screw.

Here is a link to a period pic of an MA (look at the cars in the background). You can clearly see this MA has the Hex-nut style.
https://en.wheelsage.org/category/milit ... res/xjuwfo

And another:
http://www.ewillys.com/wp-content/uploa ... ys-ma1.jpg

And on this page scroll down a little bit to the color pics. Those are period and distinctly show the MA with the hex-nut
http://willysma.com/ma_serial/photos.ph ... iod_photos

(edited to make web links work)