ARMY TM 9-2815-254-24 AIR FORCE TO 38G1-94-2 h. Install new preformed gasket (3) and cover (2). Secure cover (2) with four screws (1). i. Install fan belt and fan, refer to end item maintenance manual. j. Service engine lubrication system, refer to end item maintenance manual. 3-26.   ROCKER   COVER   AND   ARMS. 3-26.1.  Removal. a. Remove PCV assembly as required to access rocker cover, refer to paragraph 3-20.1. NOTE Rocker arm shaft (18) positioning is done by a cutaway machined on shaft end. Install retaining plates (13) and shaft (18) so that cutaway faces mating bolt stem. NOTE Rocker arms (12, 14, 16, and 17) each have a different shape. Be sure to install them in their correct location (refer to Figures 3-52 and 3-53) as viewed from front. b. Remove two bolts (1, FIGURE 3-52) washers (2), and gaskets (3) securing rocker cover (5); remove rocker cover (5) and preformed packing (6). Discard two gaskets (3) and preformed packing (6). c. Loosen eight nuts (19) and loosen adjusting screws (20) until the adjusting screws (20) just touch pushrods. d. Remove valve rocker oil feed pipe, refer to paragraph 3-16.1. Failure to loosen retainer plate bolts (7) a little at a time in the proper sequence, will adversely affect rocker arm shaft (18). e. Loosen eight bolts (7) a little at a time in the sequence shown in FIGURE 3-53. f. After all bolts have been loosened, remove eight bolts (7, FIGURE 3-52) and washers (8). Remove rocker arm   assembly. 3-26.2.   Disassembly. a. Remove two retaining rings (9, FIGURE 3-52) and washers (10) from each end of shaft (18). b. Remove eight rocker arms (12, 14, 16, and 17) four retaining plates (13) and three springs (15) from shaft (18). 3-102