. MAINTENANCE SERVICE PROCEDURE 4 - 66 EVERY 8000 HOURS SERVICE Maintenance for every 50, 250, 500, 1000, 2000 and 4000 hours service should be carried out at the same time. REPLACE HIGH-PRESSURE PIPING CLAMP Ask your Komatsu distributor to carry out this work. REPLACE FUEL SPRAY PREVENTION CAP Ask your Komatsu distributor to carry out this work.