6. If valve lash (clearance) needs to be adjusted, Loosen nuts (4, 8) on rocker arm and bridge adjusting screws. Loosen bridge adjusting screw (6). 1—Rocker Arm 3—Bridge 4—Rocker Arm Adjusting Screw Nut 5—Rocker Arm Adjusting Screw 6—Bridge Adjusting Screw 8—Bridge Adjusting Screw Nut TX1011103 –UN–28AUG06 GD61784,000005E –19–24OCT06–4/7 7. Using a feeler gauge, set valve lash (clearance) by turning the rocker arm adjusting screw. Specification Intake and Exhaust Valve (Cold)—Clearance 0.40 mm ........................................................................ 0.017 in.
TX1011102 –UN–23AUG06 1—Rocker Arm 2—Camshaft Continued on next page GD61784,000005E –19–24OCT06–5/7 TM2361 (24JUN08) 9010-25-5 450DLC Excavator Operation and Tests 062608 PN=301 Tests 5. Measure valve lash (clearance) at camshaft lobe and rocker arm with a feeler gauge as shown in table. Cylinder 1 2 3 4 5 6 No. Valve I E I E I E I E I E I E –UN–23AUG06 Intake (I) Exhaust (E) Cylinder X X X X X X TX1011102 No. 1 at TDC (top dead center) Cylinder X X X X X X 1—Rocker Arm No. 6 at 2—Camshaft TDC (top dead center) Specification Intake and Exhaust Valve (Cold)—Clearance........................................................................ 0.40 mm 0.017 in.
GD61784,000005E –19–24OCT06–3/7 9010 25 5 Cylinder No. 1 2 3 4 5 6 Valve Intake (I) I E I E I E I E I E I E Exhaust (E) Cylinder No. 1 at TDC (top dead center) X X X X X X Cylinder No. 6 at X X X X X X TDC (top dead center)