M38 fording cable bracket

4x4M38 · Post by **4x4M38** » Sat Sep 09, 2017 7:29 am

Brent Mullins is selling these:

http://m.ebay.com/itm/Jeep-Willys-M38-F ... Ciid%253A2

Can someone confirm the later NSN number?
The 7xxx number is not shown on the tag,
and I thought the originals only had one bar.

Kendall · Post by **Kendall** » Sat Sep 09, 2017 8:29 am

According to the photo in Dr. Miller's reference guide the fording control support has just one bar.
But what does it mean on the tag of the one on ebay when it states "Bracket Support Dual Control to Air Cleaner"? The dual fording cables go to each of the two fording valves.

4x4M38 · Post by **4x4M38** » Sat Sep 09, 2017 9:23 am

Hi Kendall!
That's why I'm asking. With the tag attached the provenance is pretty solid.

The tag has FSN-2540-492-5123-G 740

AND
WO A-17845

The latter number is listed on page 75 of the 1955 version of the Ord 9 G740 listed in the downloads section here.

It does not reference a previous part for which this might be a replacement.

The package date is 8/57, which of course was way beyond the last production of the M38, which would indicate it was a later contracted part, but yet still listed in the Ord 9 G740.

Maybe it was a production version whereas the one in Ryan's book might be a prototype? I don't have his book but it is on my Christmas list!

Truth be told, it seems more stout with the second bar.

I don't remember any of the M38 production without the fording controls. I may be wrong. If so, this later contract would be for post production installation of the fording ventilating system. Again, I thought they all had them from the factory, albeit two variations in the plumbing, etc.

Like that third firewall, maybe we've stumbled upon yet another heretofore unknown version of a factory M38 part.

Take care,

radtech · Post by **radtech** » Sat Sep 09, 2017 8:27 pm

It is listed in the 1956 ORD8.Aparently a later modification to stablize the bracket with an extra leg.

Post by **wesk** » Sat Sep 09, 2017 8:44 pm

This is the M38 fording valve cable support bracket as illustrated in the TM's. One arm & one cable.

The 1951 ORD 9, 1955 ORD 9 and the 1956 ORD 8 all list the ORD # as 7375125 & the WO # as A17845. Only the ORD 8 carries the FSN which is 2540-492-5123

This is the bracket in the Ebay ad.

This is the page 68 from Ryan's M38 Book:

This is the image (lower right) on page 33 of the M38 Pilot Jeep maintenance manual:

When I googled the FSN and it's NSN derivative I did not get a single hit.

It will be interesting to learn how and when this single blade support bracket metamorphosed into a two blade unit. Here is a spot that could use an original Willys factory blueprint.

4x4M38 · Post by **4x4M38** » Sun Sep 10, 2017 6:32 am

Thanks Wes.

FYI, apparently Brent has more than ten of them.

Post by **wesk** » Sun Sep 10, 2017 7:08 am

The assumption that later production added the extra leg for additional support is the only one that makes sense. The title including the term "dual control" cannot mean two legs of the control fasten to this bracket. Due to the length of the leg for the valve next to the intake manifold it would be impossible for that to happen.

4x4M38 · Post by **4x4M38** » Sun Sep 10, 2017 7:14 am

I agree Wes. I'm thinking dual control refers to the control cable
assembly from which one cable attaches to this bracket.

To Kendall's question regarding air cleaner in the description figure 28
you included below describes "air cleaner control valve".

The other valve at the PCV valve location probably has a related description.

Post by **wesk** » Sun Sep 10, 2017 8:29 am

A lot of word twisting going on here. Let's clear the mud a bit.

But what does it mean on the tag of the one on ebay when it states "Bracket Support Dual Control to Air Cleaner"? The dual fording cables go to each of the two fording valves.

1 - Bracket, Support = refers to the bracket.
2 - Dual Control is the name of the dual cable in the ORD 9 used for the fording valves.
3 - "To aircleaner" is simply added description to indicate which leg of the dual control is being supported by the bracket.

The tag has FSN-2540-492-5123-G 740

The FSN (Federal Stock Number) system was formally introduced to the military supply system in 1955 and was used thru 1974. It was not representing a newly introduced part. it was the new number used in place of the original ORD # from 1955 on. The part did not change simply because it now sported the new FSN. Just like the p[art did not change in 1975 when it sported the new NSN.

This number was the original manufacturer's number throughout production of this part.

Maybe it was a production version whereas the one in Ryan's book might be a prototype?

The illustration I posted of the Pilot M38 Maint. manual shows the single leg bracket as do all the subsequent manuals.