23. MAINTENANCE SCHEDULE CHART SERVICE ITEM PAGE EVERY 4000 HOURS SERVICE Replace injection pump screen filter 3-75 Clean injection pump oil inlet strainer 3-75 Check water pump 3-75 Replace critical parts for periodical replacement from service kit 3-75 Check, adjust air compressor 3-75 Check fan pulley and tension pulley 3-75 Check vibration damper 3-75 EVERY 3 YEARS SERVICE Replace seat belt 3-76 3-22