TM 9-2815-225-34&P 3-77.  AIR COMPRESSOR INSTALLATION THIS TASK COVERS: Installation INITIAL SETUP: APPLICABLE MODELS EQUIPMENT CONDITION All Oil pump installed (para. 3-74). SPECIAL TOOLS REFERENCES (TM) Air compressor wrench (15484) 3375159 None TEST EQUIPMENT TROUBLESHOOTING REFERENCES None Para. 2-8 MATERIALS/PARTS SPECIAL ENVIRONMENTAL CONDITIONS Pipe sealant (Appendix C, Item 26) Work area clean and away from blowing dust and Compressor gasket (15434) 3005962 dirt. Four lockwashers (15434) S-609 GENERAL SAFETY INSTRUCTIONS PERSONNEL REQUIRED None Automotive repairman MOS 63H LOCATION/ITEM ACTION REMARKS Installation NOTE Air compressor must be timed to engine firing order. 1.   Crankshaft (1) Rotate until valve set mark A on accessory drive pulley (2) is aligned with pointer (13) on front gear cover (3). 2.   Air compressor (10) Look at hub end and rotate air compressor crankshaft until scribe mark on hub is positioned halfway between 9 and 10 o'clock. 3.   Drive coupling (5) Install on air compressor (10). 4.   Air compressor (10) and new a.  Install on accessory compressor gasket (6) drive housing (11). b.  Secure with two screws (4) Tighten screws to 40-45 lb-ft and (12), washers (7), four new (54-62 Nm).  Use air compressor lockwashers (8), and two nuts (9). wrench (14). 3-592