Demonstrate proficiency in the repair and diagnosis of: Engines (gas and diesel); Power train to include differentials, transmissions, clutches, drive shafts, PTO’s and wheel ends; Electrical systems including starters and. maintenance (PM) service and to diagnose and repair the following with little or no supervision: Clutches, PTO Systems, Electric Systems, Hydraulic/Air Brake systems, Heating/Air Conditioning Systems, and Instruments and Gauges.