The limit switches on this gearbox exist for one reason. To stop it destroying itself.

A fault was suspected on them. Instead of troubleshooting it, someone unplugged them and carried on. Classic... No fault. No protection. Just a gearbox running blind with nothing to stop it going past its limits. Some people treat safety devices like they're the problem. They're not the problem. They're the thing standing between a five minute fix and a week of downtime, or worse. Bypassing a safety device isn't a fix. It's a debt. And eventually someone pays it.