TM 9-2815-225-34&P 3-51. AIR COMPRESSOR REPAIR (Contd) LOCATION/ITEM ACTION REMARKS d.  Assembly (Contd) 52. Crankshaft (43), support a.  Position piston (29) at 90° (45), new gasket (44), and after top dead center to allow crankcase assembly (35) crankshaft (43) to be installed through connecting rod (34). b.  Install crankshaft (43) on crankcase assembly (35) and through crankshaft bore end of connecting rod (34). 53. Disc (16) Position on seat (14). 54. New preformed packings Install seat (14). Lubricate preformed packings (13) and (15) (13) and (15) with clean lubricating oil. 55. Shim (18), spring (17), Install on cylinder head (24). Use thumb pressure to press and seat (14) seat (14) in position with cylinder head (24). 56. Spring (12), valve (11), and Install seat (14) on cylinder seat (10) head(24). 57. New gasket (25), cylinder a.  Position on cylinder bore of head (24), new gasket (23), crankcase assembly (35). and cover (22) b.  Secure with four screws (19), Tighten screws (19) to 15-19 lb-ft four new lockwashers (20), and (20-26 Nm). four washers (21). 3-336