M939 Series frame measurements

[Hendrickson360]

Hello!

does anybody have the measurements of the frame rails of the 5-ton trucks?

I would gues something like 10"x3"x0.4" (rail height, width and thickness) but i would like to got it more precise.

Also if anybody know the material quality .....

Greetings

 

[porkysplace]

Post # 12 of this thread shows 9"x 3" no thickness though.
https://www.steelsoldiers.com/showt...Extensions/page2&highlight=frame+measurements

 

[Hendrickson360]

Interesting, would have thought it to be higher. Of course the thickness is pretty important ... Also the steel quality. Oshkosh uses something with around 110.000psi, guess AM General went a bit lower then that back in the day.

 

[M35A2-AZ]

The frame thickness is .315" or 8mm

 

[Hendrickson360]

Thank you very much! Interesting that it's not bigger tho, since 9x3x0.315 is pretty much the exact same measurement the new GM 4-6500 trucks are going to have, which are of course not nearly heavy duty in general.

Even Am Generals own Humvee is not that far of, since i heard it has a 8"x2.5"x0.24" boxed frame, which would be comparable just by the numbers.

 

[M35A2-AZ]

On the wrecker M936 the rear frame is doubled up.

 

[Hendrickson360]

Like this: https://bangshift.com/wp-content/uploads/2013/02/kw9.jpg

or doubled in thickness?

 

[M35A2-AZ]

That is a big frame!!

The M936 It is doubled layered

 

[Hendrickson360]

Yeah well that's one of the biggest Oilfield trucks there is, massive beast. The front axle rating is higher than the entire REO GVW

But i always prefer single piece frames, without doubling or stacking, its just a cleaner way of building things, which is why SISU is going this way:

https://www.vttresearch.com/Impulse.../TimoKorhonen_Sisu_E8R8126.jpg?RenditionID=22

 

[74M35A2]

It is deliberately thin with minimal cross supports. This is so it can flex and keep all 6 wheels in driving contact with the ground at nearly all times. I drove over a car, and with my driver side front wheel atop the roof, the cab sat at a crazy angle, yet all 4 rears were still on the ground. It was amazing to see, by design. Flexes like a noodle, super cool.

 

[Hendrickson360]

Well that's of course a huge benefit if you want maximum articulation, but on the offhand it's not the best way to go for drivin a bit faster, be it on or offroad, since th whole truck will bounce around like crazy.

 

[porkysplace]

Well that's of course a huge benefit if you want maximum articulation, but on the offhand it's not the best way to go for drivin a bit faster, be it on or offroad, since th whole truck will bounce around like crazy.

These trucks were not made for speed .

 

[162tcat]

Well that's of course a huge benefit if you want maximum articulation, but on the offhand it's not the best way to go for drivin a bit faster, be it on or offroad, since th whole truck will bounce around like crazy.

It's not a race truck. It was meant to be loaded up and driven on unimproved roads reliability. It does that well. It's not a commercial over the road truck.


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