Re: I\'m Gonna Drill My Rops...
I think there are three issues here:
1. Is the ROPS going to fail in a roll-over from a couple of small holes drilled in it in non-critical locations?
2. Even if the tractor is never involved in a roll-over, are there down-sides to drilling the ROPS?
3. Do you plan to sell your tractor or allow it to be used by employees or other operators other than yourself?
I think the answer to question 1 is: Not significantly more likely to fail. I don't think they hardly ever fail anyways. At least on my tractor, the thing seems pretty well over-built. I think you could bounce my tractor on its head off of a two story building and the ROPS would only get bent a little.
In terms of 2, yes, there is a down side. The safety equipment is either certified or it is not. Potential purchasers in a re-sale situation may care about the certification. Subsequent events after the sale may lead to somebody caring if it was certified or not. If modified, no matter how seemingly insignificant the modification, the certification is technically voided. There are two options to getting it re-certified. A: Buy and install a replacement from the manufacturer, or B: submit your modifications for certification to the appropriate standards body. Both options are probably expensive.
If the answer to #3 is no, then you don't have to worry about being the Defendant in any possible lawsuits. You (or your estate) could still end up being the Plaintiff if you hurt yourself and you want to sue the manufacturere or dealer. Your case may be weakened if it can be demonstrated that you willfully and/or negligently removed or modified safety equipment that contributed to your death or injury.
Of course, there are lots of modifications that can indeed make the ROPS a lot weaker than it originally was:
If it is heat-treated, welding (or attempted drilling) will remove the temper over a larger area than just the size of the weld or hole.
I would be concerned about any changes to the hinge mechanism or near the hinge mechanism on a folding ROPS.
I would worry about any changes near any bends.
I would worry about changes down at the bottom where it attaches to the tractor and axle.
I would worry about changes that can cause water or moisture to be trapped in a critical location causing corrosion (this could be caused by plugging an existing drain hole).
If any fasteners are swapped, I would be concerned that the replacement be of the same size and grade.
I would be concerned about attaching anything that intrudes into the operator "safe envelope" like lights hung below or on the inner side of the ROPS.
I would be concerned about any equipment attached that could severly stress the ROPS. For example, a bad backhoe mounting design that connects to the part of the ROPS down near the rear axle, or a winch or something.
Even if the ROPS is not modified, the safety of the whole system could be compromised by adding equipment in a poorly chosen location. The only difference of using clamps to add lights in a bad place would be that they can be removed before re-sale.
- Rick