M939 Series frame measurements

Hendrickson360 · Apr 15, 2019

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 · Apr 15, 2019

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

Hendrickson360 · Apr 16, 2019

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 · Apr 16, 2019

The frame thickness is .315" or 8mm

Hendrickson360 · Apr 16, 2019

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 · Apr 16, 2019

On the wrecker M936 the rear frame is doubled up.

Hendrickson360 · Apr 16, 2019

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

or doubled in thickness?

M35A2-AZ · Apr 16, 2019

That is a big frame!!

The M936 It is doubled layered

Hendrickson360 · Apr 16, 2019

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 · Apr 18, 2019

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 · Apr 19, 2019

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 · Apr 19, 2019

Hendrickson360 said:
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 · Apr 19, 2019

Hendrickson360 said:
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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M939 Series frame measurements

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