TM 9-2815-225-34&P 3-51.  AIR COMPRESSOR REPAIR (Contd) LOCATION/ITEM ACTION REMARKS a.  Disassembly (Contd) 9. Preformed packings (13) Remove from seat (14). Discard preformed packings and (15) (13) and (15). 10. Disc (16), spring (17), and Remove from cylinder head (24). Disc (16) might be attached to shim (18) seat (14). 11. Drive coupling (1) Remove from half coupling (49), if not already removed. NOTE Assistant may be required for the following step. 12. Half coupling (49) Remove from crankshaft (43). Use coupling half puller (ST-1249) or (3376663) (52).  Use locating key in puller (52) to index puller teeth behind coupling (49) teeth. 13. Thrust bearing (48) Remove from crankshaft (43). 14. Two captive washer screws Unscrew and remove four Discard lockwashers (46) and (38) and four screws (47) lockwashers (46), support gasket (44). (45), and gasket (44) from housing (37). 15. Crankshaft (43) a.  Rotate until piston (29) is Piston (29) and crankshaft (43) about 90 before or after must be in this position before top dead center. crankshaft (43) can be removed. b.  Move crankshaft (43) around while pulling it out of connecting rod (34). 3-316