TM 5-4310-452-14 B-4. EXPLANATION OF COLUMNS IN TOOL AND TEST EQUIPMENT REQUIREMENTS, SECTION III (Con't). c. Column 3, Nomenclature.  Name or identification of the tool or test equipment. d. Column 4, National/NATO Stock Number .  The National or NATO Stock Number of the tool or test equipment. e. Column 5, Tool Number .  The manufacturer's part number. B-5. EXPLANATION OF COLUMNS IN REMARKS, SECTION IV. a. Column 1, Reference Code.  The code recorded in Column 6, Section II. b. Column 2, Remarks.  This column lists information pertinent to the maintenance function being performed as indicated in the MAC, Section II. Section II.  MAINTENANCE ALLOCATION CHART (1) (2) (3) (4) (5) (6) Maintenance Level Unit DS GS   Depot Group Component/ Maintenance Tools and Number Assembly Function C O F H D Equipment Remarks 01 ENGINE 0100 Engine Assembly Inspect 0.5 1 Test 0.6 1 Service 0.5 1.0 1 Replace 9.0 1, 2, 3 Repair 8.0 46.0 1, 2, 3, 4 B Overhaul 46.0 1, 2, 3, 4 0101 Crankcase, Block, Cylinder Head Engine Block Replace 48.0 1, 2, 3, 4 Repair 8.0 1, 2, 3, 4 0102 Crankshaft Inspect 1.0 1, 2, 3, 4 Replace 11.0 2 0103 Flywheel Assembly Inspect 1.0 Replace 9.0 1 Repair 10.0 1 B 0104 Pistons, Connecting Test 1.0 2 Rods Replace 3.0 1, 2, 3, 4 Repair 4.0 1, 2, 3, 4 0105 Valves, Camshafts, and Timing System Valve Train Mechanism Adjust 2.5 1, 2 Replace 3.5 1, 2 Repair 4.5 1, 2, 3 Timing Gears Replace 8.5 1, 2, 3 Repair 9.5 1, 2, 3 B 5-3