You can’t put bevel gears together in the same way as spur and helical types and get them to work well. They need to be assembled in a specific way to ensure smooth running and optimum load distribution between gears.
When an important gear failure occurs, someone becomes responsible for analyzing the failure, determining its cause, and recommending a solution.
A company can select its own engineer, an outside consultant, or both. If a consultant is called in, this should be done as early in the process as possible.
Though similar procedures apply to any failure analysis, the specific approach can vary depending on when and where the inspection is made, the nature of the failure, and time constraints.