TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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ADJUSTMENT EXHAUST VALVE CLEARANCE 1. Place speed control lever (Figure 1, Item 2) in idle speed position and secure stop lever (Figure 1, Item 1) in stop position. CAUTION Do not rotate crankshaft in counterclockwise direction using crankshaft bolt. Crankshaft bolt can loosen and serious engine damage may result if crankshaft bolt is not securely tightened to crankshaft. 2. Using crankshaft end bolt, rotate crankshaft clockwise until injector follower (Figure 1, Item 3) is fully depressed on cylinder to be adjusted. 3. Hold push rod (Figure 1, Item 8) in position and loosen push rod locknut (Figure 1, Item 7). NOTE Normal ambient temperature (cold engine) is 100° F (38° C) or less. 4. Place 0.026 inch (0.660 mm) thickness gage (cold engine) between end of one exhaust valve stem (Figure 1, Item 5) and rocker arm bridge (Figure 1, Item 4). 5. Turn push rod (Figure 1, Item 8) in or out of clevis (Figure 1, Item 6) until a smooth pull is obtained on thickness gage. 6. Remove thickness gage. Hold push rod (Figure 1, Item 8) and tighten locknut (Figure 1, Item 7). Lightly tap rocker arm at bridge (Figure 1, Item 4) with wrench to release friction. STOP POSITION IDLE POSITION 2 3 4 5 6 7 8 1 MAINT_215 Figure 1. Adjust Valve Clearance. TM 9-2815-205-24 0078 0078-2