Skill Level 1 Troubleshoots and performs unit maintenance on the automotive systems and components of M109/M107/M110 self-propelled howitzers, M548, M578, M88/A1, and the 113 family of vehicles. Maintains diesel power plants/packs, compression ignition engine fuel systems, compression ignition air induction systems, track vehicle exhaust systems, air cooling systems, vehicle liquid cooling systems, vehicle starting systems, vehicle charging systems, track hull electrical systems, automatic transmission assemblies crossdrive transmission assemblies, auxiliary drive assemblies, tract vehicle suspension systems, lockout suspension systems, mechanical/hydraulic steering systems, track vehicle hydraulic systems, auxiliary power units, fire extinguisher / suppression systems, and gas particulate filter systems.

Skill Level 2 Perform duties in preceding skill level, supervises lower grade soldiers, and provides technical guidance to the soldiers in the accomplishment of their duties. Troubleshoots, isolates, and identifies causes of system or component malfunction. Inspects electrical wiring and hydraulic lines.

Skill Level 3 Perform duties in preceding skill levels and self-propelled field artillery turret mechanic (MOS 45D) duties. Performs battlefield damage assessment and repair (BDAR) of track vehicle armament/automotive systems. Inspects and troubleshoots automotive/armament systems of M109 series howitzer, M110 series Howitzer, and M992. Inspects and troubleshoots automotive systems of M113 series vehicles, M578 recovery vehicle, and M88A1 recovery vehicle.

Skill Level 4 Perform duties in preceding skill levels. Supervises the performance of battlefield damage assessment and repair.