For an easy access to the desired parts, the valve
support plate has to be flipped over.
Loosen and remove the two fixing screws (1).
If blow-off valves are mounted there are two
possibilities:
• Variant 1: loosen and remove the two valve
fixing screws (2).
• Variant 2: loosen and remove the three
fixing screws of the head bottom cover (3).
For the preventive maintenance, the head
bottom cover has not to be removed in case of
choosing variant 1.
For the corrective maintenance (Vacuum
Feedthrough Cleaning), the head bottom cover
has to be removed in any case.
Turn the valve support to the side.
Check Silicon Tube
Check the silicon tube, it may not be kinked, broken, tangled up etc. Untangle tangled up tube,
kinked or broken tube has to be replaced.
Move the ZT element up and down to control
the free movement of the silicon tube. Where
necessary, adjust the tube by slightly turning
them at the connections.
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