John Deere 450DLC — Engine Valve Lash (Clearance) Check and Adjust

9. Using a feeler gauge, adjust valve lash (clearance) by turning bridge adjusting screw. At this point the opposite end of the bridge should be raised. 10. Hold bridge adjusting screw and tighten bridge adjusting nut. TX1011104 –UN–11AUG06 Specification Intake and Exhaust Valve (Cold)—Clearance 0.40 mm ........................................................................ 0.017 in. Bridge Adjusting Screw Nut— Torque 78 ............................................................................................ 58 lb-ft 11. Rotate crankshaft 360 ° until T/C mark on flywheel is aligned with top mark on flywheel housing. Adjust remaining valves as shown on chart.

1—Rocker Arm 3—Bridge 7—Valve Stem 12. Install lower valve cover from engine. See Lower Valve Cover Remove And Install. (Group 0400.) 13. Connect negative (-) battery cable. GD61784,000005E –19–24OCT06–7/7 TM2361 (24JUN08) 9010-25-6 450DLC Excavator Operation and Tests 062608 PN=302 Tests 8. Hold rocker arm adjusting screw (5) and tighten rocker arm adjusting nut. Specification Rocker Arm Adjusting Screw Nut—Torque................................................................................... 78 N•m –UN–28AUG06 58 lb-ft 1—Rocker Arm 3—Bridge TX1011106 5—Rocker Arm Adjusting Screw 9010 25 6 GD61784,000005E –19–24OCT06–6/7