3. Rotate crankshaft until T/C mark on flywheel is aligned with top mark on flywheel housing. 4. Check for clearance in cylinder No. 1 or cylinder No. 6 rocker arms. The cylinder with clearance in both rocker arms is at TDC (top dead center). TX1002653 –UN–27JAN06 Continued on next page GD61784,000005E –19–24OCT06–2/7 TM2361 (24JUN08) 9010-25-4 450DLC Excavator Operation and Tests 062608 PN=300 Tests Engine Valve Lash (Clearance) Check and Adjust CAUTION: To prevent accidental starting of engine while performing valve adjustments always disconnect negative (-) battery terminal. 1. Disconnect negative (-) battery cable. 2. Remove lower valve cover from engine.
See Lower Valve Cover Remove And Install. (Group 0400.) NOTE: Glow plugs may be removed to ease crankshaft rotation. 9010 25 4 GD61784,000005E –19–24OCT06–1/7