TM 5-4310-386-14 Section II.  MAINTENANCE ALLOCATION CHART FOR COMPRESSOR UNIT 20 CFM, 3200 PSI (1) (2) (3) (4) (5) (6) Maintenance Level Unit Intermediate Depot Tools Group Component/ Maintenance and Number Assembly Function C O F H D Equip Remarks 0410 VALVE HEAD 1ST Replace 0.2 1 STAGE ASSEMBLY Repair 0.5 1 0411 VALVE HEAD 2ND Replace 0.2 1 STAGE ASSEMBLY Repair 0.5 1 0412 VALVE HEAD 3RD Replace 0.2 1 STAGE ASSEMBLY Repair 0.5 1 0413 VALVE HEAD 4TH Replace 0.2 1 STAGE ASSEMBLY Repair 0.5 1 0414 1ST STAGE Inspect 0.1 CYLINDER AND Replace 2.5 1, 21, 22, PISTON 92, 93 Repair 5.0 1 0415 2ND STAGE Inspect 0.1 CYLINDER AND Replace 2.5 1, 21, 22, PISTON 92, 93 Repair 5.0 1 0416 3RD STAGE Inspect 0.1 CYLINDER AND Replace 2.5 1, 21, 22, PISTON 92, 93 Repair 5.0 1 0417 4TH STAGE Inspect 0.1 CYLINDER AND Replace 2.5 1, 21, 22, PISTON 92, 93 Repair 5.0 1 0418 SAFETY VALVE Inspect 0.2 Replace 0.5 0419 DRIVE BELT AND Inspect 0.1 GUARD Adjust 0.5 Replace 0.3 1 B-6