MAINTENANCE 4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH FILTER SERVICE High Pressure Filters "HPF", illustration Z 21780 NOTICE G The filter reference numbers (1 - 6) correspond to the numbering of the main pumps. G If, for example, the fault message "High pressure filter #5 restricted" is being displayed on the ECS screen, the fil- ter number (5) in the illustration has to be serviced. The engine will be shifted automatically to low idle speed. The fault message can be generated either through a restricted high pressure filter or through the correspond- ing chip indicator mounted in the main pump sump. Stop work and inform Service staff about the fault message.
Legend for illustration Z 21780 (1) HPF for pump 1 (2) HPF for pump 2 (3) HPF for pump 3 (4) HPF for pump 4 (5) HPF for pump 5 (6) HPF for pump 6 (7) Drain plug (8) Filter case (9) Hexagon (10) Filter element (11) Packing ring (12) O-ring (13) Back-up ring (14) O-ring (15) Filter header Clean or replace high pressure filter elements: 1. Place working attachment on the ground and shut-off the engines. Relieve pressure in the hydraulic system with several move- ments of the control levers. 2. Place a suitable container below the filter in order to collect outflowing oil. 3. Remove plug (7) and drain the oil. 4. Screw off filter case (8). 423