23.
MAINTENANCE SCHEDULE CHART SERVICE ITEM PAGE EVERY 1000 HOURS SERVICE Change oil in swing machinery case 3-65 Check oil level in damper case, add oil 3-66 Check and adjust valve and injector clearance (1 st 1000 hour only) 3-67 Change oil level in final drive case, add oil 3-73 EVERY 2000 HOURS SERVICE Change oil in hydraulic tank, clean strainer 3-74 Check alternator, starting motor 3-79 Check water pump 3-79 Check all tightening parts of turbocharger 3-79 Check and adjust valve clearance and injectors 3-79 Crankcase breather clean and check 3-79 Check play to turbocharger rotor 3-80 EVERY 4000 HOURS SERVICE Change antrifreeze 3-80 Check drive belt, idler and fan hub bearings 3-80 Check vibration damper 3-80 EVERY 6000 HOURS SERVICE Clean and rebuild or replace injectors 3-81 Clean and calibrate fuel pump 3-84 23.2 MAINTENANCE WHEN USING HYDRAULIC BREAKER For machines equipped with a hydraulic breaker, the hydraulic oil deteriorates faster than for normal bucket digging operations, so set the maintenance intervals as follows.
Replacement interval for hydraulic oil Replacing hydraulic filter element On new machines, replace the element after the first 100 to 150 hours, then carry out further replacement of the element according to the table on the right. Changing oil in hydraulic tank Change the oil according to the table on the right. Replacing additional filter element for breaker Use a guideline of 250 hours for use of the breaker operating ratio for the breaker: 50% or more) and replace the element accord- ing to the table on the right.
Replacement interval (H) Operating ratio of breaker (%) (When using breaker only) Additional filter element Hydraulic tank filter element PC450-ENG 3-22 When not us reaker) in g