The issues with ROPS I recall were from some of the CDC FACE (Fatal Accident... ) reports. Some of the roll-overs were determined that the operator would have easily survived, except they removed the ROPS, cut the cab off shorter (skid loader), mounted it incorrectly, or left it folded down.
I don't have the ones related to ROPs all collected, but the link to the whole collection:
CDC FACE Reports
A good example of ROPs modification ending up badly:
ROPs Lowered to fit in Hog Building
Other information I have are stories passed around verbally back when I worked at Toro. I am not sure how true they are, and they may have been exaggerated as they were passed around. Some of them were used as justifications for actual design changes and additions to the safety equipment, and the safety modifications were certainly real enough.
Maybe Mythbusters could investigate some of these, but I think they are all plausible enough to be taken as cautionary examples at the least.
The guy who duck-taped the dead-man's handle on his mower, then cut off some of his fingers emptying the bag. He then won a large settlement by claiming the dead-man's handle was too easy to bypass with duck-tape. After that for a while, the Toro mowers had a handle you had to actively move down and then back up to re-engage the blade clutch every time you restarted.
The guy who injured himself using his mower to trim hedges from a ladder. He won because there was no warnings in the manual or on the machine to not use the mower to trim hedges form a ladder.
The kid who lost some fingers when his father told him to lift up the mower so he could adjust the height of cut WHILE IT WAS RUNNING. They won because there was no safety interlock to prevent height adjustments while the mower was running even though the manual and markings on the machine clearly warn to stop the mower before adjusting the height.
The lady who was killed by a 500 lb riding lawn mower that rolled on her within a week after she got home from the hospital after recovering from injuries from the previous time the machine rolled on her on the same hill! (If a 500lb riding mower can kill you, a 2000lb machine can do so that much more easily.)
- Rick