TM 10-4320-344-243.8.17 Rocker Arm Assembly Maintenance. Model 609-A. (Continued)Figure 3-37.Rocker Arm Assembly Installation, Model 609-A.f .Tie a wire between number 1 rocker arm (Figure 3-35, 1) and number 12 rockerarm (2).Make sure wire is tied tightly enough to maintain tension on spacingsprings while rocker arm assembly (5) is being installed.3.8.17.5 Installation.B e f o r e i n s t a l l i ngarms are properlyrocker arm assembly on cylinder head, check that rockerinstalled and move freely on rocker arm shaft.a.Install rocker arm assembly (5) over center head studs on cylinder head (6)and seat rocker arm assembly (5) firmly on cylinder head (6).Ensure rockerarm adjusting screws (Figure 3-36,10) are positioned over push-rods incylinder head (Figure 3-35, 6).b .Install seven flat washers (4) and nuts (3) on center head studs of cylinderhead (6).Hand tighten nuts (3).c .Remove wire from rocker arm assembly (5).When tightening mounting nuts on rocker armwork outward.Tighten each nut a few turnsis placed on all valve springs.assembly, start at center nut andat a time so that equal tensiond.Following sequence shown in Figure 3-38, torque nuts to 75 ft-lbs (102 N•m),then to 125 ft-lbs (170 N•m), and finally to 147 ft-lbs (199 N•m).e .Refer to paragraph 2.21.49 and perform cold valve adjustment.3-86NOTENOTE
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