Lukas Hydraulic cylinder - Manual (Page 19)

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7.3.2 Checking the pump unit
See the separate operating instructions for the relevant aggregate (or the
handpump).
NOTE:
Before working on the pump aggregate or connecting/disconnecting hoses,
always make sure that the pump aggregate or electric pump is switched off and
disconnected from the electricity supply and that the control valves have been
set to depressurised recirculation.
7.4 Hydraulic control of the cylinder
The operation of the cylinder piston cannot be controlled directly by the cylinder.
The retraction and extension of the cylinder must be controlled by a separate control unit or
by the connected hydraulic unit.
7.3.1 Initial start-up
The equipment must be de-aerated before commissioning and following repairs.
- Connect the equipment to the hydraulic pump (see chapter “Connecting the equipment”).
- Extend and retract the equipment several times under no load.
NOTE:
We recommend that during the de-aeration, the unit connected for the hydraulic
supply should stand on a higher level than the cylinder.
The connections on the hydraulic cylinder should point upwards.