MAINTENANCE
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9.8.1 Check
You can press the sliders into the seat of the check valves with your finger. If the slider can no longer
seal the seat of the check valves properly (stroke length of the slider is significantly shorter), the check
valves must be cleaned.
9.8.2 Cleaning
By removing a retaining ring on the outside of the system, you can remove the affected slider, clean
the slider housing (see also 9.3, Cleaning agents) and insert the slider again.
9.9 Separating/ventilation cylinders
The seals of the separating cylinder, and those of the ventilation cylinder for blower operation, must be
replaced if there are leaks.
9.9.1 Replacing the seals on the separating/ventilation cylinders
Depressurize the system.
Open both end covers.
Unscrew 4x fastening screws on the separating cylinder (ventilation cylinder).
Remove the pneumatic hoses from the cylinder.
Remove the cylinder opposite the valve unit from the system.
Remove the defective sealing gasket and adhesive residues from the slot (see also 9.3,
Cleaning agents).
Attach the replacement sealing gasket to the slot using special adhesive.
Install the cylinder again, connect it to the pneumatic hoses and close the end covers.
Afterwards, perform a leak test.
9.10 Checking the system for leaks
Read out the vacuum on the gauge during preliminary storage (in the storage chamber). (The
separating cylinder is extended and separating the storage chamber from the valve chamber). The
measured value must correspond to the maximum value of the relevant vacuum generator.
If the vacuum is not achieved, the system must be checked for leakage as follows.
1. Check the hose, hose connections, tubing and the cable screw union on the multi-pole plug for
damage and leaks, and replace them as necessary.
2. Check whether the vacuum filter is blocked or dirty; if necessary, clean the filter cartridge or
replace it.
3. Replace the seal on the separating cylinder/ventilation cylinder.
4. Check that the blower or pump is fully functional.
5. Check that the vacuum generator is fully functional.
