Komatsu — Komatsu PC450-6K and PC450LC-6K Hydraulic Excavator Operation & Maintenance Manual

24. SERVICE PROCEDURE 6. After adjusting the injector and valves on the appropriate cylinder, rotate the accessory drive pulley and align the next valve set mark with the pointer on the gear cover. 7. Adjust the appropriate injector and valves following the injector and valve adjustment sequence chart. Repeat the process to adjust all injectors and valves. After adjusting all the injectors and valves, check the torque on the adjusting screw locknuts to make sure none were overlooked. 8. Installation cover If the valve cover gasket was not damaged, it can be used again. If the gasket was damaged, it must be discarded and a new one used. Install the gasket on the cover.

Install the cover on the rocker lever housing. Install the 16 isolators, spacers and capscrews in the cover. Tighten the capscrews in the sequence shown. Torque Value: 15 N•m [130 in-lb] PC450-ENG 3-71