MAINTENANCE 24.10 EVERY 4,000 HOURS SERVICE Perform the maintenance for every 50, 100, 250, 500, 1000 and 2000 hours at the same time. 24.10.1 CHECK WATER PUMP Check that no play exists in the pulley. Also, check that no grease or water leaks from the drain hole, or that it is clogged. If any problem is detected, contact your distributor. WA450-3MC 3-60