MAINTENANCE 4.13 EVERY 2000 OPERATING HOURS OR YEARLY HYDRAULIC SYSTEM - CHANGE OIL, REPLACE SUCTION STRAINERS AND PULSATION DAMPER FILLING THE HYDRAULIC SYSTEM 1. Make sure main shut-off valve is in open position and all con- nections are securely tightened. REMARK Select hydraulic oil viscosity grade according to ambient tem- peratures. If the new hydraulic oil has a different viscosity grade compared with the drained oil it is necessary to enter the new viscosity grade into the appropriate ”Excavator Components” group of the ECS Menu Control. 2. On machines equipped with Central Refilling System fill main hydraulic oil reservoir according to section "Central Refilling System" on page 256.
On machine without central refilling system fill main oil reser- voir through opening (4), illustration Z22878. Depending on type of attachment and the present oil temperature, select the applying oil level range on plate (3). Be sure to use the cor- rect marking on oil level plate (3). Legend for illustration Z22878 (1) Main hydraulic oil reservoir (2) Hydraulic oil level sight gauge (3) Oil level plate (4) Oil filler plug 447