Air Filter Clip Screw size

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
Spencer54
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Air Filter Clip Screw size

Post by Spencer54 » Wed Jul 03, 2019 7:57 am

Anyone know what the size of the air filter clip screw is?
Specifically the one that is on the clips that hold the concertina rubber pipe from the cross over tube to the air filter.

Thanks

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Re: Air Filter Clip Screw size

Post by Joe Gopan » Thu Jul 04, 2019 3:39 pm

I just unwapped a NOS 635097 and the screw is #10-24 NC X 1-1/2"
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Re: Air Filter Clip Screw size

Post by Spencer54 » Fri Jul 05, 2019 3:03 am

Interesting, just to be clear this is the pan head screw that is used in the wire clips.

Image

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Re: Air Filter Clip Screw size

Post by Joe Gopan » Fri Jul 05, 2019 4:53 am

The Part No. of the Clamp used for the Air Cleaner Hose is WO-635097. I have an NOS here in front of me The screws used in the originals are a 10-24 X 1-1/2" Round Head just like the one in your pic.I also removed the screw to gauge the thread, it is #10-24NC.
Original clamps do not have the bright finish as you have illustrated, other than that, the clamp has original features.
Nice find, tho.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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Spencer54
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Re: Air Filter Clip Screw size

Post by Spencer54 » Fri Jul 05, 2019 6:06 am

Pictures are of the JMP clamps - I'm having trouble installing as the screw appears short, or my rubber is too thick.
The screws supplied measure from the end of the thread to the base of the Pan Head 1.340" or 34mm.
If your NOS one is 1.5" that makes theirs about 5mm too short which is nothing really, but if the hose its 5mm too wide - then that explains why I'm short.

Looks like I'll need a 2" one to make life easier.

Thanks for the info much appreciated.

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Re: Air Filter Clip Screw size

Post by Joe Gopan » Fri Jul 05, 2019 6:34 am

I probably could buy some 10-24 Round Head Screws ithat are 1-1/2" long in a Hardware store and mail them to you.
I bought my clamps from Willys prior to the 70's.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
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Re: Air Filter Clip Screw size

Post by Spencer54 » Fri Jul 05, 2019 7:03 am

Very kind of you, now you've supplied the size I'll have a hunt on ebay - they're bound to be here somewhere in use for something.

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Re: Air Filter Clip Screw size

Post by Joe Gopan » Fri Jul 05, 2019 9:04 am

Those who have bought these apparanty excellent clamps here in the USA can simply go to a Tru-Value or ACE Hardware store and solve the issue for a few cents as they stock these screws. Am sure Joe's Motor Pool will soon have the correct hardware.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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Re: Air Filter Clip Screw size

Post by Chuck Lutz » Fri Jul 05, 2019 10:57 am

The first photo below show the thin, accordion-like hose that connects the air cleaner to the crossover as having the clamps with a LOT of excess threads after the screw has passed through the nut.

The second photo shows what appears to be the felt wrap-around junction being held by an all together DIFFERENT type of fitting. It would be much thicker and would require a longer thread to secure the clamp over it.
Engine Mid Late 42 GPW Side.jpg
Engine Mid Late 42 GPW Side.jpg (145.52 KiB) Viewed 373 times
Engine-Ford-original-LATE.jpg
Engine-Ford-original-LATE.jpg (217.87 KiB) Viewed 373 times
In other words, you may not be able to use the wire-type clamps where the crossover tube enters the air horn.

Or....if you have that correct "accordion-style hose" that connects the air cleaner to the crossover tube, then the wire-type clamps should not only be long enough, but should extend past the nut as shown in the photo above.

1) wrong hose between air cleaner & crossover tube?
2) trying to use the wire-type clamp where the crossover tube and air horn are joined?
3) wrong length screws in the JMP wire-type clamp?
Chuck Lutz

GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947

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Re: Air Filter Clip Screw size

Post by Joe Gopan » Fri Jul 05, 2019 1:36 pm

My clamps are OEM, the Hose I stock is OEM From Jeep . The I.D. of the OEM A-1311 hose is 2-1/8" The I.D. of the 635097 HOSE CLAMP is 2-9/32".
It is quite evident that JMP used screws that are too short and should have been 2-1/2" in length.

And just to make sure, these are the clamps for the WO-A-1311 HOSE?
Last edited by Joe Gopan on Sat Jul 06, 2019 2:52 pm, edited 1 time in total.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
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Re: Air Filter Clip Screw size

Post by Chuck Lutz » Fri Jul 05, 2019 2:31 pm

Joel....

As in the photo, can you confirm the clamps you are talking about are the WIRE TYPE that are used between the air cleaner and the crossover tube... and not the flat type used between the crossover tube and carb air horn.
Chuck Lutz

GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947

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Re: Air Filter Clip Screw size

Post by Joe Gopan » Fri Jul 05, 2019 4:03 pm

I instantly recognized the clamps. Been looking under Jeep hoods since the mid 40's.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
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Re: Air Filter Clip Screw size

Post by Chuck Lutz » Sat Jul 06, 2019 1:18 pm

...again...which ones are you talking about, the wire-type or the flat-type and how long is the screw for that type?


Just sayin'...c'mon Joel, which of the two types are you posting the screw length on?
Chuck Lutz

GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947

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Re: Air Filter Clip Screw size

Post by Joe Gopan » Sat Jul 06, 2019 2:59 pm

The 635097 Clamp only comes in one style, check the illustrations in the SNL's and CJ-2A/CJ-3A to confirm and the Originals on my MB are the same as the NOS OEM 635097 clamps I bought from Jeep wayback when. Those clamps all use a Round Head #10-24 X 1-1/2" Machine Screw.

The 10-24 Clamp Screws are not listed in any of the MB Parts manuals as they are a part of the Clamp Assembly.
Other than the short screws, JMP did a beautiful job.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
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Re: Air Filter Clip Screw size

Post by Joe Gopan » Sun Jul 07, 2019 5:30 am

And Chuck, although there was more than one manufacturer of that 2-1/8" A-1311 type Air Cleaner Hose, they all use the same wire style clamp.
Get out your Lloyd White books listing the Vendors to Jeep and see if you can ID that Air cleaner hose.Old time 40's manufacturer's (Vendors) were Gates, Dayton. Thermoid, etc., and they all looked a bit different.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

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