Lukas Hydraulic cylinder - Manual (Page 23)

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10.2.2 Function and load test
Perform a stress test if there is doubt about safety or reliability.
10.2.3 Replacing the hydraulic fluid
- After approx. 200 deployments, but after three years at the latest, replace the hydraulic fluid
CAUTION!
Always carry out the hydraulic fluid change using a fluid collection vessel and
dispose of the fluid collected in a proper manner!
CAUTION!
The hydraulic fluid must be completely replaced if the deployment
conditions (ambient temperatures) change considerably. When selecting the
appropriate hydraulic fluid, please bear in mind the Chapter “Hydraulic Fluid
Recommendations”.
Procedure:
1. Retract the cylinder completely and depressurise the hydraulic system.
2. Remove the couplings from the cylinder.
3. Allow the hydraulic fluid to run out
4. Flush
5. Refit the couplings
6. Connect the pump with new hydraulic fluid.
7. Bleed as described in chapter “Initial Commissioning”.
8. Disconnect the pump again.
10.3 Repairs
10.3.1 Changing the seals
The seals must be replaced in the event of:
- Leaks,
- Externally visible damage (e.g. on the wiper),
WARNING / CAUTION!
Work on the internals of the cylinder, e.g. changing the seals, must only be
carried out by trained experts!
All parts must be replaced by genuine LUKAS parts!
NOTE:
Changing the seals is similar on all types of cylinder.
However, there are differences resulting from the type of cylinder and the size.
For this reason, it is absolutely imperative that you always have the appropriate
spare parts list for your cylinder to hand when carrying out a repair. All instructions
on the spare parts list must be taken into account as well as these operating
instructions!