Clutch hardware

Discussion topics on Willys Overland M series vehicles
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idiocrates
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Clutch hardware

Post by idiocrates »

Well, I hate it when this happens........can someone please tell me where in the Ord 9 manual I can find the spec's for the bolts that attach the clutch to the flywheel? I know I've seen it.......I even wrote it down someplace so I could get six new bolts......now I'll be darned if I can find it again. Thanks.

Jim
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cody10414
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Post by cody10414 »

M38A1 ?

ORD 9- pg 56
7324841 SCREW, cap, hex-hd... 6 ea
120638 WASHER, lock, ...... 6 ea
(specs are more detailed in ORD-9)

Same as illustrated and indexed in TM 9-8015 pages 38-39:
A- Screw, cap, .... 7324841
B- Washer, lock,....120638


Hope this is what you were looking for.
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idiocrates
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Post by idiocrates »

Exactly what I was looking for......and looking and looking.....so thanks. Just another one of those days when I couldn't find it even using both hands. And yes......for the M38A-1. So, does anyone know of a place to get 5/16" x 1 1/16" bolts...or will 1" bolts work? Thanks again.

Jim
dayboy42
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Post by dayboy42 »

I had a hard time finding the correct bolts but I wanted to share this for other peoples future needs who might stumble across this topic. ~ Matt

https://www.vintagejeeps.com/p-1383-clu ... 30129.aspx

Image
Matt, Truck 1/4 Ton 4x4, M-38 (G-740)
Willy's Model: MC
DOD April 1952
Ser. # 63326
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Jeff_Lee
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Post by Jeff_Lee »

I am down in Argentina, so mail order is not really an option. Fortunately there is La Ferreteria (the hardware store) that carry a good selection of SAE threaded bolts.

My question is what grade are these? I imagine they are at least Grade 5, but would Grade 8 provide more shear strength, or be too brittle?

Gracias!
1951 M38 restoration project - Flightline Jeep MC 23923 DoD 6-51
1954 M-100 Trailer USMC Dunbar Kapple s/n M-750759 DoD 1-54
1947 Willys CJ2A - Harvest Green
1954 Ford F-100 Parts chaser - blueprinted Y-Block
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dayboy42
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Post by dayboy42 »

Its hard to see in my picture but these special bolts have a "shoulder" and are there to ensure the pressure plate is centered. If you take a look at your flywheel holes you will see that the threads do not come all the way to the top for that reason.

People have and continue to use regular bolts which work.... but theirs always a chance you might get a vibration.

5/16NC X 1-1/16, I have heard 1 inch long work. You will need 5/16 lock washers also.

To answer your question I believe they are grade 5. I'm sure someone here can confirm that.

I just want to make it clear that I am not criticizing anyone's choice on hardware. I always say it's your jeep so you need to decide what you think is best.

Hope this helps!

Have a great day

~ Matt
Matt, Truck 1/4 Ton 4x4, M-38 (G-740)
Willy's Model: MC
DOD April 1952
Ser. # 63326
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