probst HVZ-UNI-II Instructions D'emploi page 92

Operation
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Open the main grippers for 2 seconds. At first the hydraulic cylinder of the pushing off device will retract and
the first row of paving stones will obtain the accumulated elastic force. The opening sequence of the main
clamping happens after the complete extension of the ADV cylinder and the paving layer is laid in the grade.
The paving stones are pressed down from the ADV bar.
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Move the support point 5-10 cm in direction of the facing bedding sand side main clamping.
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When you lift the HVZ-UNI it will swing automatically in direction of the facing bedding sand (facing bedding
sand side main clamping), away from the already laid paving stones. So it is possible to lift the HVZ-UNI
without removing paving stones of the front row.
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Open the main clamping completely and close it immediately for 1 seconds while moving the installation
machine to the next paving layer. The closing sequence of the main clamping causes the hydraulic cylinder of
the ADV to extend and the spring pack is loaded.
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The installation clamp HVZ is ready for the next laying cycle.
If the packages are bad or instable, usually caused by bad pallets, paving stones at the side rows could
HINT:
fall over or fall down while shifting the paving layer direct on the package. In this case lift the paving layer
without shifting, set it down on a suitable ground and shift it there.
If the gripping quality is not good enough (layer is tending to break or paving stones in side rows tend to
HINT:
fall over) keep the side clamping closed until you reach the laying position and open it a short time
before you lay it down.
Don not try to „tip" the paving layers in side clamping direction with the already laid paving stones. This
HINT:
is not possible, because the paving layers in the clamp are compressed and the already laid paving stones
are unconsolidated. It is better to either remove the "key-stones" before laying and later bring it back or
lay additional paving stones after the complete laying process.
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