OPERATING INSTRUCTIONS Inspection and servicing Bypass valves (working circuit)
Read and observe the "Inspection and servicing – Safety instructions" chapter.
Cleaning the filter screens Ü Remove cover (10, Fig. 3-52:). Remove screws (12) and take out the bypass valve. Withdraw sieve (13) and clean in white spirit or paraffin oil. Replace, if required. Ü Check sealing ring (16) for damage and replace, if required.
Shut off the engine.
Ü Re-assemble the bypass valve.
Risk of scalding caused by hot hydraulic oil.
Ü Check sealing rings (14 and 15) for damage and replace, if required.
The hydraulic oil reservoir itself may also be hot. Avoid skin contact.
Ü Insert the bypass valve. Make sure the valve fits properly.
Skin contact with hydraulic oil may cause skin injury.
Ü Refit cover (10) with sealing ring (15).
Wear protective gloves and firm working clothing. Collect escaping hydraulic oil and discard without polluting the environment.
Fig. 3-52:
Replacing the bypass valves and the sealing rings Ü Remove the bypass valve as described under "Cleaning the sieve". Ü Re-assemble new bypass valve with sieve (13) and new sealing ring (16). Ü Insert bypass valve with new sealing ring (14). Ü Refit cover (10) with new sealing ring (15).
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BA RH30F(3 659 030.00)-EN
