Lukas HP Cylinders - Manual (Page 15)

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7.2.2 Checking the pump unit
See separate operating instructions for the corresponding unit (or hand pump).
NOTE:
Before working on the pump unit or connecting/disconnecting hoses, always
make sure that the pump unit is switched off or disconnected from the supply
in the case of electric pumps, and that the control valves have been set to
depressurised recirculation.
7.3 Hydraulic cylinder control
Movement of the cylinder piston cannot be directly controlled by the cylinder. Extending
and retracting the cylinder must be controlled via a separate control unit or the connected
hydraulic unit.
7.2.1 Initial operation
Before commissioning and following repairs, the device must be de-aerated.
- Connect the equipment to the hydraulic pump (see chapter “Connecting the
equipment”).
- Fully extend and retract the device several times without load.
NOTE:
We recommend that during the de-aeration, the attached unit for the hydraulic
supply should stand on a higher level than the cylinder.
The connections on the hydraulic cylinder should face upwards.