Maintenance 5 5.7.3. Maintenance after the first 50 operating hours Hydraulic system, replacing the filter insert Frequent contact between used hydraulic oil and skin may cause skin lesions and other physical damage! Wear rubber gloves when changing the filter. Thoroughly wash off any hydraulic oil adhering to your skin. Use only the prescribed supporting prop to support the work unit. Never use other objects as supports 1. Lower the work unit onto the floor. 2. Raise the boom and tilt out the bucket. 3. Put the parking brake on. Danger of injury caused by boom! It is only permitted to step into the area below the boom if the boom is supported. 1 4.
Position the supporting prop underneath the boom. 5. With the engine switched off, lower the boom slowly until it rests safely on the supporting prop. 6. Turn the venting filter (1) several revolutions to let the pres sure escape. 7. Clean the surface of the filter cap (2) and the area around the filter cap. 8. Unscrew the filter cap. 2 9. Pull out the filter element (3) at the handle (4) . 10. Pull the filter element off the handle and dispose of the filter element. 11. Clean the inner surface of the filter housing. Before you start cleaning, check that there is no undesired material in the filter housing. 12. Put the handle onto the new filter element. 13.
Insert the new filter element into the housing. 14. Screw on the filter cap and tighten it with 20 Nm. GK100913 15. Loosen the venting filter by turning it a couple of rotations. 16. Start up the engine. 17. Bring the boom into its highest position. 18. Bring bucket into its tip-in position (up to its limit stop). 19. Re-tighten the venting filter. 20. Perform a test run and check that the system is tight. WA90-5 – VEAM270100 5-37 WARNING WARNING WARNING WARNING