Air horn-air cleaner tube clamp A-281 /A-1515 ???

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
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Rune P
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Air horn-air cleaner tube clamp A-281 /A-1515 ???

Post by Rune P » Tue Aug 21, 2007 10:52 am

In Nabholst I am reading on page 85 about changes from clamp A-281
to A-1515. This change are happen in Desember 41.
Could somebody explain to me how this clamps look like ?
Or mayby somebody could put in a photo of them ?
I belive it must something wrong in my partslist about these clamps.
:? :? :?
Rune P
41 MB 102386 USA# W2033810
42 GPW 23468 USA# 20104200


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Post by Hobo » Tue Aug 21, 2007 2:45 pm

Rune!

Clamp A-1515 is known to us all I guess! Does it not look like the bigger version of the ones used on the water hoses?
Lars-Uwe Rudek
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Post by Hobo » Tue Aug 21, 2007 3:03 pm

No, it gets a bit more complicated I guess!

As per SNL G-503 it says:

WO-A 281 - Clamp, Carburator to air horn, w. BOLT and NUT (S 13/32 I.D. x 1/2)

I think this is the solid one! Really thick!

Possibly Nabholtz has made a mistake! As this one is not indicated to have changed at all in the SNL!

HOWEVER, WO-A 1515 is!!!!

It says as follows:

WO-A 1515 CLAMP, hose, S., 2 1/2 in I.D. ( used for WO-A 1451 BUSHING; used carburator to air cleaner tube) superseded by CLAMP, FM-GPW-9625, WO-53384) - 2 used

And

WO-53384 CLAMP, carburator and air cleaner horn (supersedes CLAMP FM-GPW-2250, WO-A-1515.) - 1 used

In the exploded view WO-A-1515 is shown as the the thick solid one, same as used on the carp to the air horn...also used on the air horn to the grommet linking to the cross over tube...

So there may have been THREE differnet versions!

a) on early MBs WO-A-281
b) on mid MBs WO-A-1515, the thick one as the one on the carb!
c) on late MBs WO-53384, guess just the bigger version as those used on the water hoses!

Now we need to find a hint for WO-A-281....may be the I.D. of "just" 1/2 is a missprint!

Could a look into MA lists help?
Last edited by Hobo on Tue Aug 21, 2007 3:21 pm, edited 1 time in total.
Lars-Uwe Rudek
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GPW 213313 (HOBO) DoD 7-26-44
GPW 261254 (SUSIE BLUE) DoD 3-26-45 (est.)
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Post by Hobo » Tue Aug 21, 2007 3:17 pm

In Farley's book some pictures can be seen:

Page 7:

Farley mentions the single wing nut on the air cleaner horn (AC) and refers to it as (A281)!!! :shock: :shock:

...who made a mistake here then???

Anyways, the picture shows the "water hose" type clip with the slot in the very same picture! But that could have been changed in service!

Page 10:
Farley shows a picture of U.S.A. W-2033241, a slat of December 41...
The clamp used looks solid and thick to me! Maybe WO-A-1515 ?

HOWEVER,

Page 14:
Farley shows an early MB, Slat...he mentions MB 103486 and says "Air tube cleaner tube to carb clamp changed from A281 to A1515"

The picture shows again the "water hose type" clamp with the slot!!!

Getting near!

But not giving you the definite answer! :cry:
Lars-Uwe Rudek
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GPW 213313 (HOBO) DoD 7-26-44
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Post by Hobo » Tue Aug 21, 2007 3:26 pm

Hmmmm!


A bit late here! Sigh!

A-281 MUST be the same thick one as used on the carburator! It is still shown as one used for that purpose i the SNL! In December 41 I guess they used TWO, the second one on the link between the carb horn and the cross over tube...that would correspond with the Farley picture on page 10!

Note: A-281 uses a BOLT, not a SCREW!

NOW, then the A 1515 would be the one similar to the ones used on the water hoses...

BUT, what is the WO 53384 one then??? A wire one as used between air filter and flex tube? But with a different diameter????
Lars-Uwe Rudek
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GPW 213313 (HOBO) DoD 7-26-44
GPW 261254 (SUSIE BLUE) DoD 3-26-45 (est.)
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Post by Hobo » Tue Aug 21, 2007 3:33 pm

THREE CLAMPS????

Three men having the same problem in 1942!!!

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GPW 213313 (HOBO) DoD 7-26-44
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Post by Hobo » Tue Aug 21, 2007 3:39 pm

The above picture shows the difference between the thick one on the carb and the "water hose" one on the air x- member...

Image

The Girl above shows us the difference in the wire one on the flex air hose and the thin one on the air horn / carb linkage!
Lars-Uwe Rudek
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GPW 213313 (HOBO) DoD 7-26-44
GPW 261254 (SUSIE BLUE) DoD 3-26-45 (est.)
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Post by Hobo » Tue Aug 21, 2007 3:48 pm

In this early Jeep picture you can clearly see the same clamp is used on the air horn to air x-member as on the air horn carb...the thick one A-281!

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Lars-Uwe Rudek
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GPW 213313 (HOBO) DoD 7-26-44
GPW 261254 (SUSIE BLUE) DoD 3-26-45 (est.)
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MB 290875 (HOBBES) DoD 12-21-43

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Post by Buster » Tue Aug 21, 2007 8:18 pm

Nice to see you return lately Hobo!
Good pictures, almost hate to admit it but I once had a pair of shoes like the guy in the first picture with his foot on the bumper. 8)
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Post by JAB » Wed Aug 22, 2007 12:00 am

I'm looking closely at the tools in the 3rd picture. Too bad we can't see a better veiw of that 11" auto wrench.
-Jeff

GR8GPN2U!!!

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Post by Bill M » Wed Aug 22, 2007 2:34 am

I took a clamp off a GPW cross over tube and it is a larger version of the radiator clamps and it is marked A15 1/2. I am sure Lawrence Nahholtz mentions that this is the same as the clips that hold the brake lines to the axle tubes. I have also removed an A15 1/2 from a Willys front axle assy.
cheers
Bill Mullen.
Member of G503 since 1999


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Post by Hobo » Wed Aug 22, 2007 2:49 am

Image

This one is the same as used on the carb. I believe this would be the early version.

The picture is of a reproduction and I think the original would have had a hex bolt rahter than a screw head...but I am not really sure...

It is also shown in the SNL, where it is described as WO-A-1515...but that might be wrong, as it could be that the picture used is old but the part number description fot this part (D) is the new one.


Image

Here is the one Bill Mullen described:

Image

Could the thick one be WO-A-281 and the latter one WO-A-1515? If yes, the picture in the SNL is wrong...

Then what is WO-53384 ??
Lars-Uwe Rudek
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GPW 213313 (HOBO) DoD 7-26-44
GPW 261254 (SUSIE BLUE) DoD 3-26-45 (est.)
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MB 290875 (HOBBES) DoD 12-21-43

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Post by Frank » Wed Aug 22, 2007 7:04 am

A-281 (2 13/32" ID)was used between the carb horn and the carb.

A-1515 (2 1/2" ID) Air horn to Carb and air tube with bushing A1451.

A 1515 was also used for the brake line to axel (3 ea)

A281 was listed in the 1949 Ord9 and could be used with a seal. A1515 was also listed, but to be used with a different seal.

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Post by Hobo » Wed Aug 22, 2007 7:11 am

Thanks Frank!

So, A-281 is the chunky one...and used a screw, not a bolt!
A-1515 is the one like those used on the water tubes, different diameter, same as on the axles...

And yes, the illustration in the SNL is wrong, showing the A-281 but designating it A-1515!!!

We need to find a WO-53384 now!!!!

CHeers!
Lars-Uwe Rudek
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GPW 213313 (HOBO) DoD 7-26-44
GPW 261254 (SUSIE BLUE) DoD 3-26-45 (est.)
MB 177547 (JONSEY) DoD 9-28-42
MB 290875 (HOBBES) DoD 12-21-43

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Post by Rune P » Wed Aug 22, 2007 12:48 pm

Hello boys :D
Thanks for the help.Nice pictures! Lars where do you get them from ?

I understand it like this.
A-281 are the clamp on the carb side of the air horn.This is from the start in 1941 to the end of production.

From start in 41 and to midle desember 41 the same clamp A-281 was also used on the tube side of the air horn.
(how did the rubber who was used on the tube side with this clamp look like ) :?

After desember 41 and to the end of production clamp A-1515 (the one on Franks bottom photo) was used.

Is this correct ?
Rune P
41 MB 102386 USA# W2033810
42 GPW 23468 USA# 20104200


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