What does the '2 numbers' in the TM Numbering System indicate?

The '2 numbers' in the TM Numbering System indicate the echelon level of maintenance for the vehicle series. This system categorizes vehicles based on the complexity of maintenance required, assisting operators and mechanics in understanding what level of support is necessary for the upkeep and repair of the vehicle.

By identifying the echelon level, the TM Numbering System ensures that personnel know who is qualified to perform the maintenance—whether it be operator-level maintenance or more advanced repairs needing specialized skills. This classification helps streamline maintenance operations within the Army by ensuring the right resources and personnel are employed at the correct level, thereby enhancing efficiency and vehicle readiness.