TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Note. The valve timing procedure must be followed in detail to prevent the valves from striking the head of the piston. 1. 2. 3. 4. 5. Rotate the right camshaft (A) until the two lobes (cams) for intake and exhaust valves for No. 6R cylinder are pointed towards the crankshaft. Remove cover from fuel injector nozzle holder assembly opening in cylinder. Apply a light film of sealing compound (MIL-C-10523 Ord.) on valve rocker arm cover and position cover (B) on cylinder. Identifying numbers on cover and cylinder must correspond (fig. 5-105). Valve rocker arm rollers must contact base circle of camshaft and lip of preformed intercylinder hoses must not be folded under cover. Tap cover gently to position cover over dowel pins. Refer to figure 5-109 and torque tighten four bolts (C) to 275 to J25 pound-inches. Refer to figure 5-108 and torque tighten all bolts and cap screws to 100 pound- inches. Refer to figure 5-107 and secure camshaft gear housing to valve rocker arm cover and cylinder with bolts (D). Using thickness gage blade-5210-793-7897 (E) set intake valve clearance to 0.100-inch by turning the adjusting screw clockwise to decrease the clearance or counterclockwise to increase the clearance. Note. Check position of valve adjusting screw pad. Pad must seat flat on valve stem. Figure 7-22. Installing valve rocker arm cover and adjusting intake valve clearance (cylinder No. 6R). Note. The exhaust valve clearance is decreased by turning the adjusting screw clock- wise or increased by turning the screw coun- terclockwise. Torque tighten adjusting screw lock nut to 175 pound-inches after adjustment. Figure 7-23. Adjusting exhaust valve clearance. 7-18