TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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ADJUSTMENT NOTE A 0.025 inch (0.635 mm) thickness gage (cold engine) must pass freely between end of one valve stem (Figure 1, Item 5) and rocker arm bridge (Figure 1, Item 4). A 0.027 inch (0.686 mm) thickness gage (cold engine) must not pass through bridge clearance. Mark each rocker arm with a crayon or marker after adjustment. 7. Check valve bridge clearance with thickness gage. If clearance is not within limits, repeat procedures in Steps 3–6. 8. Adjust all exhaust valves following Steps 1–7. FUEL INJECTOR TIMING 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. NOTE Time all fuel injectors during one full revolution of crankshaft. Firing order: 1L, 3R, 3L, 2R, 2L, and 1R (Figure 2). 1 2 3 1 FRONT LEFT VIEW RIGHT VIEW FIRING ORDER 1L, 3R, 3L, 2R, 2L, 1R 2 3 MAINT_216 Figure 2. Firing Order (1L, 3R, 3L, 2R, 2L, 1R). 1. Using crankshaft end bolt, rotate crankshaft clockwise until exhaust valve stems (Figure 3, Item 5) are fully depressed on cylinder to be timed. 2. Hold fuel injector push rod (Figure 3, Item 8) and loosen push rod locknut (Figure 3, Item 7). TM 9-2815-205-24 0078 0078-3