TM 5-4220-209-12&P Section II.  MAINTENANCE ALLOCATION CHART NONENCLATURE OF END ITEMS Compressor, Reciprocating, Diesel Engine Driven 20 CFM, 3200 PSI NSN  4310-01-044-2301 (1) (2) (3) (4) (5) (6) MAINTENANCE GROUP COMPONENT MAINTENANCE LEVEL TOOLS AND NUMBER ASSEMBLY FUNCTION C O F H D EQUIPMENT   REMARKS 01 Air Compressor Service X Ass’y - DED 20 CFM 3200 PSI Replace X Overhaul X 02 Air Compressor Service X Ass’y Repair X Replace X Overhaul X 03 Air Intake Ass’y Inspect X Service X Repair X Replace X 0301 Filter Element Replace X 04 Cylinder Head Inspect X Ass’y Replace X Repair X 0401 Valves, (Inlet &  Inspect X Outlet) Service X Test X Replace X 0402 Valves, Safety Test X (All Stages) Replace X 05 Cylinder & Crank Change 1  A-4