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TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download

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TM 9-2815-220-34 lll ROlAH AllM r u•lfll I '·'•I 1 ( Iii! L: I !Ot  W r l n• H All:I• S , fl � '•Ttſt - I F'igure 3-JZ5. Positio11i11g enginejly1dtcel, model A DS-1790-tC «11d AVDS-1790-�D e11qi11es. c. Rotate the right camshaft (g. 3-326) until the two lobes (cams) for the intake and exhaust valves for No. 6R cylinder are pointed towards the crankshaft. Remove cover from fuel injector noz- zle holder assembly opening in cylinder. cl. Apply a light film of sealing compound (MIL- S-45180 ORD) on valve rocker arm cover and posi- tion cover on cylinder. Identifying numbers on cover and cylinder must correspond (fig. 3-64). Valve rocker arm rollers must contact basecircleof camshaft and lip of preformed intercylinder hoses must not be folded under cover. Tap cover gently to position cover over dowel pins. e. Install four new packings with retainers on four bolts (lig. 3-326) and install the four bolts and torque lighten to 275 to 325 pound-inches. Secure rocker cover to cylinder head with two capscrcws and flat washers (3, fig. 3-67) seven bolts and flat washers (2) and four bolts and flat washers (1). 3-232 Change 1 Torque tighten eleven bolts and two capscrews to 100 pound-inches. f. Secure camshaft gear housing to valve rocker arm cover with one capscrew, flat washer and lock washer (1, fig. 3-66) and to cylinder head by tightening two capscrews, flat washers and lockwashers (2) installed above. g. Using thickness gage blade part numbel' 10882617 (fig. 3-326) set intake valve clearance to 0.100 inch by tuing the adjusting screw clockwise to decrease the clearance 01· coun- terclockwise to increase Lhe clearance. Check posi- tion of valve adjusting screw pad to make sul'e seat is flat on valve stem. h. Using thickness gage blade part number 10882616 (fig. 3-327) set exhaust valve clearance to 0.025 in. by tuing the adjusting screw clockwise to decrease the clearance or counterclockwise to increa se the clearance. Check position of valve ad- )