MAINTENANCE MAINTENANCE PROCEDURE Hydraulic Oil Filter Element - Replace 0. The parts and oil are at high temperature after the engine is stopped, and may cause burns.Wait for the temperature to go down before starting the work. When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it. NOTICE If the machine is equipped with a hydraulic breaker, the hydraulic oil will deteriorate much faster than dur- ing normal bucket operations. For details, see "MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER ( 4-14 )" when carrying out maintenance. 1. Open the cover at the right side of the machine. 2.
Remove the cap from oil filler (F), and release the internal pressure. 3. Loosen 3 bolts, then remove cover (1). When doing this, the cover may fly out under the force of spring (2), so hold the cover down when removing the bolts. 4. After removing spring (2) and valve (3), take out element (4). 5. Clean the removed parts in diesel oil. 6. Install the new element where the old element (4) was installed. Check the O-ring fitted to cover (1). If it is scratched or dam- aged, replace it with a new O-ring. 7. Set valve (3) and spring (2) on top of the element. 8. Set cover (1) in position, push it down by hand, and install the cover with the mounting bolts. 9.
Extend the boom, arm, and bucket cylinder fully as shown in the diagram on the right, remove the oil filler cap, then install the cap and pressurize the inside of the tank. 10.Close mud cover at the right side of the machine. 4-45 WARNING