24. SERVICE PROCEDURE 6. Loosen 4 bolts, then remove cover y . When doing this, the cover may fly out under the force of spring x , so push the cover down when removing the bolts. 7. Pull up the top of rod c , and remove spring x and strainer v . 8. Remove the dirt stuck to strainer v , then wash it in clean diesel oil or flushing oil. If strainer v is damaged, replace it with a new one. 9. Refit strainer v by inserting it into tank projecting part e . 10. Install cover y with bolts. 11. Add the specified amount of engine oil through oil filler port F . Check that the oil level is between H and L on the sight gauge. For type of oil to be used, see 20.
“USE OF FUEL AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE”. NOTICE When the hydraulic breaker is installed, the hydraulic oil dete- riorates earlier than in normal bucket digging work. Therefore re- place the hydraulic oil according to the table at the right. Replacement interval for hydraulic oil 12. After replacing hydraulic oil and cleaning or replacing filter element and strainer, bleed air from the circuit according to the following pro- cedure. Replacement interval (H) (when using breaker only) (When not using breaker) Operating ratio of breaker (%) PC450-ENG 3-75