MAINTENANCE PROCEDURE 4.9.4 EVERY 1000 HOURS MAINTENANCE Carry out the maintenance for EVERY 500 HOURS SERVICE at the same time. 4.9.4.a CHANGING THE HYDRAULIC OIL FILTER ELEMENT 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. Oils, filters, coolants and batteries are considered special waste and must be collected and disposed of according to the regulations in force.
IMPORTANT If the machine is equipped with a hydraulic breaker, the hydraulic oil will deteriorate much faster than during normal bucket operations. For details, see "4.8.2 MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER" when carrying out maintenance. On machines containing synthetic biodegradable oil type HEES , this must be changed for the first time after the first 50 hours of operation and successively every 1000 hours of operation. 1. Remove the tank cover (1). (For further details, see para- graph "3.2.11 TANK COVER"). 2. Loosen bolts (2), then remove plate (3) to the front. 3. Remove the cap from oil filler (F), and release the internal pressure. 4. Remove bolts (4), then remove cover (5).
When this is done, the cover may fly off under the force of spring (6), so keep the cover pushed down when removing the bolts. 5. After removing spring (6) and valve (7), take out element (8). 6. Clean the removed parts in diesel oil. 7. Install the new element where old element (8) was in- stalled. Inspect the O-ring set between the hydraulic tank and cover (5). If there are any scratches, replace the O-ring. 8. Set valve (7) and spring (6) on top of the element. 9. Set cover (5) in position, hold it down by hand, and tighten cover mounting bolts (4) to install cover (5). 201 WARNING