. MAINTENANCE MAINTENANCE PROCEDURE 4 - 71 EVERY 4000 HOURS MAINTENANCE Maintenance for every 100, 250, 500, 1000 and 2000 hours service should be carried out at the same time CHECK WATER PUMP Check that there is no play in the pulley, l eakage of oil or water, or clogging of the drain hole. If any problem is found, please contact your Komats u distributor for repairs or replacement.