24. SERVICE PROCEDURE 24.9 EVERY 4000 HOURS SERVICE Maintenance for every 50,250,500,1000 and 2000 hours should be carried out at the same time. 24.9.1 CHECK WATER PUMP Check that there is no play in the pulley, water leakage, or clogging of the drain hole. If any abnormality is found, contact your Komatsu distributor for disassembly and repair or replacement. 3-63