TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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7/16-20UNF x 1-'h inch machine bolts (2). Install a 11/•·inch socket (3) and turn crankshaft until valve rocker arm rollers are on the camshaft base circle, or until both valves are closed. NOTE Check rocker arms to see that they move up and down. If movement (clearance cannol be felt, turn engine until clearance is evident. When clearance is obtained be- tween both adjusting screw pads and valve stem, the 1·ocker arm rollers are on the camshaft. base circle, and the valves are completely closed .. (12) Remove four machine bolts and packing with retainer (6, lig. 2-88) and t·emove valve rocker arm cover (7). 1 lntercylinder connector flange 2 l nlercylind er sleeve 3 Machine bolt and lockwasher 4 Machine bolt and flat washer Machine screw and flat washer 6 Machine bolt, packing and retainer 7 Valve rocker arm cover 8 Adj u s t ing screw lock nut 9 Exha us t valve adjusting scr.,w 10 Adjusting screw lock nut l1 l ntake valve adj\1slin� screw Figu 2·88. Re111111•i11g 111· i11tal/i11g 1•all•f mck1,1· C1r111 c111•cr. (13) Remove valve adjusting screw as shown in figure 2-89. NOTE Valve rockers do not have to be removed to replace adjusting screws. (14) Remove two valve rocker arm shaft plugs (fig. 2-90) and remove rocker arm shafts and rocker arms (fig. 2-91). TM 9-2815-220-34 igurt2·91. Rt'mu1•i11g 11c1/ve r11ckrrar111 shaJ(s r+1d 1·alt•e cker arms. Change 1 2·70.5