Rollover bar

grfox · Jun 27, 2023

Anyone put a rollover bar on a John Deere M?

Brendon-KS · Jun 28, 2023

I've never done what you're asking but, being the owner of an M, I can envision that a rollbar would be right in the way of your head when you're getting on and off the tractor due to the unique characteristics of that particular tractor. Not sure where one would be mounted that wouldn't seriously be in the way.

Also note that a rollbar is of little value without a seatbelt to go along with it and adding that properly could be an equally challenging issue.

BarnyardEngineering · Jun 28, 2023

I would say if anyone has, they wouldn't be bragging about it here because the safety police would tear them to shreds.

For sure there isn't anything commercially available, as the M's are not that numerous and were produced long before rollover protection was even a consideration on tractors.

I'm thinking you'd need something more along the lines of the roll cages they put on later Farmall 140's. It's another mid-1930's design with no consideration for a ROPS, but toward the end of production IH did make one available.

wh · Jun 28, 2023

Put this on a super a a few years ago. NO WAY that i say it is a roll over protector. Makes a great sunshade. I am sure you can put one on a john deere m with a little thinking.

IaLeo · Jun 28, 2023

While you are designing a roll over cage, consider putting fluid in all four tires to lower the center of gravity, then get some insurance policy that also would cover a roll over accident (?). Or if it can be done, widen the rear wheel stance a bit. I am serious, not kidding. I helped design a cab structure years ago for a 80000lb tractor. You don't have to have no bending, just enough strength to prevent collapsing into the operator's zone, however it is a moot point if the operator does not stay in his zone.

Roll over protection or sunshades can cause a roll over on a small tractor if working around trees. Also think of counter balancing if you are using a mounted sickle mower.

I am not a registered engineer and these are suggestions you could ponder yourself, you know how this unit is going to be used and none of us on the board knows that! Leo

Muir hill 101 · Jun 29, 2023

Holy cow 80,000 pounds was it a track type tractor or articulated loader ? And yes without a seatbelt and an operator who uses the seat belt the rops is just one more thing to knock your block off in most cases although it could save you in the right situation

fdt860 · Jun 29, 2023

(quoted from post at 08:30:13 06/28/23) While you are designing a roll over cage, consider putting fluid in all four tires to lower the center of gravity, then get some insurance policy that also would cover a roll over accident (?). Or if it can be done, widen the rear wheel stance a bit. I am serious, not kidding. I helped design a cab structure years ago for a 80000lb tractor. You don't have to have no bending, just enough strength to prevent collapsing into the operator's zone, however it is a moot point if the operator does not stay in his zone.

Roll over protection or sunshades can cause a roll over on a small tractor if working around trees. Also think of counter balancing if you are using a mounted sickle mower.

I am not a registered engineer and these are suggestions you could ponder yourself, you know how this unit is going to be used and none of us on the board knows that! Leo

Absolutely correct.

The official ROPS test used to be a gigantic sharpy test, with a big pendulum.

Now,the test is based on energy absorbtion ,with hydraulic cylinders that measure motion and force.
The new test made it easier f9r engineers to improve their design,and to correlate finite elements analysis and reality.

Rollover bar

grfox

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Brendon-KS

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BarnyardEngineering

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wh

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IaLeo

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Muir hill 101

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fdt860

Well-known Member

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