24. SERVICE PROCEDURE 24.1.25 REPLACE ADDITIONAL BREAKER FILTER ELEMENT Prepare a container for draining off oil. 1. Place the container under the filter element. 2. Turn filter case y counterclockwise to remove it. Remove element x from the case. 3. Unscrew plug c from filter case y . 4. Clean the removed parts. Mount a new element x and O-ring v . 5. After the case reaches the filter holder, additionally tighten the case by more than 1/2 turn. NOTICE When the breaker is used, replace the element approx. Every 250 hours (when operating ratio is more than 50 %), referring to the chart at the right.
Replacement interval (H) Operating ratio of breaker (%) 24.1.26 CLEAN INLINE FILTER If the hydraulic system between the pump and jinline filter a has been opened, or if there is any abnormality in the hydraulic equipment, remove the dirt inside the circuit as follows: 1. Remove plug b . 2. Remove and clean filter d . n When cleaning the filter, remove all dirt stuck to the side of the filter. n When reassembling the filter replace O-rings c and e with backing ring f at the same time. n After reassembling the line filter, start the engine and run at low idle for 5 minutes to bleed the air. It is not necessary to operate the control levers to bleed the air.
PC450-ENG 3-44 WARNING Immediately after operating the engine, all parts still retain high temperature. never replace the filter in such condition, replace it only after each part has been sufficiently cooled.