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OPERATING INSTRUCTIONS RH 120 E
Inspection and servicing
Bypass valves (hydraulic oil reservoir)
Read and observe the "Inspection and servicing – Safety instructions" chapter.
Switch off the electric motor. Risk of scalding caused by hot hydraulic oil. The hydraulic oil reservoir itself may also be hot. Avoid skin contact.
Skin contact with hydraulic oil may cause skin injury.
Wear protective gloves and firm working clothing. Collect escaping hydraulic oil and discard without polluting the environment.
Cleaning the filter screens
Fig. 3-44:
" Remove cover (3, Fig. 3-44:) together with sealing ring. Unscrew screws (25). Withdraw bypass valve. Take off screen (21) together with sealing ring and clean in white spirit or paraffin oil. Replace, if required.
Check sealing ring for damage and replace, if required.
Re-assemble the bypass valve.
" Check sealing ring (28) for damage and replace, if required.
" Insert bypass valve and fasten with screws (25).
Replacing the bypass valves and sealing rings
" Remove bypass valve as described under "Cleaning the screens".
" Re-assemble the bypass valve with a new screen (21, Fig. 3-44:) and a new sealing ring.
" Insert bypass valve with new sealing ring (243) and fasten with screws (25).
Operating Instructions
Inspection and servicing
Replacing the hydraulic oil return-flow filters (filter housing)
Read and observe the "Inspection and servicing – Safety instructions" chapter.
Switch off the electric motor.
Risk of scalding caused by hot hydraulic oil. The hydraulic oil reservoir itself may also be hot. Avoid skin contact.
Skin contact with hydraulic oil may cause skin injury.
Wear protective gloves and firm working clothing. Collect escaping hydraulic oil and discard without polluting the environment.
Replace the return-flow filters (15, Fig. 3-45:) together with the return-flow filters in the hydraulic oil reservoir.
Fig. 3-46:
" Detach cover (10, Fig. 3-46: resp. Fig. 3-45:) together with sealing ring (12).
" Withdraw filter element (15).
" Insert a new filter element.
If metal filings are detected, locate cause and rectify.
Contact the Terex|O&K Service, if required.
" Refit cover (10) with new sealing ring (12).
