Because the Caterpillar operator manuals and other literature say that you must replace seat belts after three years, you may have to replace perfectly good seat belts. MSHA can enforce such requirements from manufacturers.
We can debate that for a long time, but let’s start back a step. Are you replacing seat belts when they become damaged or worn? While CAT’s policy may have created this firestorm (which is before the courts somewhere I’m told) it should at least lead us to take a good look and start by replacing seat belts that should be replaced. For that CAT has a very nice little tool. It’s a toolbox talk that provides a checklist that reminds us that it’s more than the webbing that should be examined. You can download the pdf file below. Why not give a copy to each of your operators (CAT equipment or not) and be sure that these lifesaving devices will function when called upon. I’ve also included an online checklist from an Australian aftermarket supplier.
If you are going to replace that seat belt and want to do it with something other than one from the manufacturer, be sure to meet the requirements of 30 CFR 56/57.14130(h) and 56/57.14131(c). They should have a tag on them showing adherence to the latest versions of SAE J386 or SAE J1194 standards. Check out the MSHA links below.
Resources: CAT Seat Belt Toolbox Talk, Seat Belt Safety Checklist, 30 CFR 56/57.14130, 56/57.14131, MSHA 2003 Final Rule seat belt update