24. SERVICE PROCEDURE 24.10 EVERY 6000 HOURS SERVICE Maintenance for every 50, 100, 250, 500, 1000 and 2000 hours should be carried out at the same time. 24.10.1 Injector Remove STC Every 6,000 hours, clean and rebuild or replace the injectors. To clean and calibrate the injectors, remove them from the engine. The injectors must be calibrated on an injector test stand. Remove the hose from the crankcase breather. Remove the 16 capscrews, isolators and spacers from the rocker lever cover assembly. Remove the cover and gasket. Loosen the locknut and turn out the adjusting screw on each injector and valve rocker lever. Some push rods are under compression due to the valves being open.
Rotate the crankshaft clockwise with the accessory drive pulley to relieve the spring tension. NOTE: Mark the position of the push rods as they are removed. Due to wear patterns on the cam follower sockets and adjusting screws, the push rods must be installed in the same position as from which they are removed. Hold the push rod with one hand to prevent it from falling into the engine. Loosen each adjusting screw and remove the push rod. NOTE: Do not remove the links from STC injectors. Rotate the injector and valve rocker levers up on each cylinder. Remove the crossheads. Mark the position and orientation of the crossheads as they are removed.
Due to wear patterns, they must be installed in the same locations from which they were removed. Loosen the injector hold down capscrew and remove the hold down. Use injector puller; Part No.3823024, to remove the injectors. Do not use anything metal to scrape the injector copper sleeves. Damage to the injector sleeve can occur. Use a clean wooden stick with a clean cloth wrapped around the end to remove all of the carbon from the injector copper sleeves in the cylinder head. PC450-ENG 3-81