SHB 803 en – Edition 2.4 * 803s314.fm 3-39
Maintenance
Changing hydraulic oil
Only change the hydraulic oil if it is warm (about 50 °C).
Retract all hydraulic cylinders before changing the oil.
☞Open the filler plug to release pressure
☞Open drain valve C on the lower side of the reservoir and install drain hose D (included
in the scope of delivery of the excavator) to drain the oil into a container
☞Check the hydraulic oil reservoir for contamination and clean it if necessary
☞Screw the drain plug back in correctly
☞Add clean hydraulic oil through a screen
–see“Adding hydraulic oil” on page 3-38
☞Close the hydraulic oil reservoir correctly
☞Close and lock the engine cover
☞Let the machine run at idling speed without load for some minutes
Replacing the filter cartridge
☞Open the engine cover
☞Remove the coolant reservoir
☞Unscrew the return line from the filler cap
☞Loosen the filler cap of the hydraulic oil reservoir
☞Remove the cover with the connection piece and the filter cartridge
☞Replace the filter
☞Reassemble in the reverse order
☞Check for tightness after a short test run
☞Check the fluid levels
☞Close and lock the engine cover
Fig. 36: Hydraulic oil reservoir drain valve
C
D
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