SECTION II.  MAINTENANCE ALLOCATION CHART FOR DRILLING SYSYEM, WELL, ROTARY, TRUCK MOUNTED, AIR TRANSPORTABLE, 600 FEET CAPACITY (1) (2) (3) (4) (5) (6) Maintenance Category Group Component/ Maintenance Tools and Number Assembly Function C O F H D Equipment Remarks 00 Well Drilling System Repair 80.0 01 Well Drilling Rig Inspect 14.4 Service 9.0 0.1 Replace 2.8 46.2 112.0 Repair 10.6 72.4 141.0 202.5 0101 Lighting, Mast Inspect 0.1 Replace 4.0 Repair 6.0 0102 Piping Assy, Discharge Inspect 0.1 Replace 1.5 Repair 0.1 1.5 010201 Valve, Shear Relief Replace 0.5 Repair 0.1 1.0 010202 Valve, Ball Replace 1.5 Repair 0.5 0103 Mast Assy Inspect 1.0 Service 0.6 A,B Replace 15.0 Repair 13.0 8.0 1,5,6 010301 Block Assy, Crown Inspect 0.2 Replace 2.0 Repair 2.0 010302 Sprocket Assy, Chain Inspect 0.2 Feed Replace 2.0 Repair 1.0 010303 Pulldown Assy, Chain Inspect 0.2 Replace 2.0 Repair 1.5 0104 Cylinder, Mast Raising Inspect 0.1 Service 0.1 B Replace 1.5 Repair 3.0 1,5,6 0105 Drive Assy, Mud Pump Inspect 0.1 Service 0.2 B,C Replace 2.0 Repair 5.0 1.0 1,5,6 010501 Clutch Replace 3.0 Repair 2.0 0106 Mud Pump Assy Inspect 0.2 Service 0.2 B,C Replace 2.0 Repair 8.0 18.0 1,5,6,9,10 0107 Air Compressor Drive Inspect 0.5 Test 0.5 Replace 8.0 Repair 2.0 5.0 1,5,6 A-4