ARMY TM 9-2815-257-24 AIR FORCE TO 38G1-128-2 MARINE CORPS TM 10155A/2815-24/3 3-21 3-15.  ROCKER ARM ASSEMBLY MAINTENANCE  -  cont. C.   HEAD COVER INSTALLATION. Install head cover (1) onto cylinder head (2) using bolts (3). Figure 3-6.  Valve Clearance Adjustment