OPERATING INSTRUCTIONS RH 40 E Inspection and servicing Depressurizing " Park the excavator on a horizontal surface. " Set the working equipment on the ground. " Shut off the drive engine. Sections 1 and 2: servo control and working hydraulics - Shift both control levers repeatedly into all dIrections (Fig. 3-51:).
Fig. 3-52:
Topping up with hydraulic oil " Remove cover (20, Fig. 3-53:) and retaining disk (23). " One of the return-flow filters is now visible in the filter chamber.
Fig. 3-51:
Section 3: return-flow line After shutting down the engine, the precharging pressure decreases rapidly through the precharging valve. No measures are required before opening the return-flow line.
" Fill in hydraulic oil through this return-flow filter until the oil level lies between the ½ and ¾ marks of the inspection glass (oil grade cf. "Refilling quantities - Oil"). " Before fitting retaining disk (23) and cover (20), check sealing ring (26) and replace if damaged. " Fit cover together with sealing ring.
Checking the hydraulic oil level " Bring hydraulic oil to operating temperature (abt. 50 °C). " Park the machine on a horizontal surface. " Move all hydraulic cylinders to their central positions. The oil level must lie between the ½ and ¾ marks of the inspection glass (1, Fig. 3-52:).
Fig. 3-53:
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BA RH40E(3 664 930.00)-EN
