Subject to change · UM 045_14264401
· 0916 · EN
Page 10
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4. How to operate the filter unit
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The filter unit is equipped with a suction strainer on the suction side, which has to be maintained regularly
(see page 9, item 18).
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A defective or missing suction strainer can lead to pump damage.
WARNING
›
Wear safety gloves, safety shoes and protective goggles.
4.1 Filtering hydraulic fluids in the by-pass flow (note safety instructions)
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Connect and fix the filter unit as described under point 2 (with 3 phase motors please observe the rotating direction).
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Immerse the suction pipe and the delivery pipe into the hydraulic tank of the machine or plant.
Note:
The distance between intake side and delivery side should be kept apart as far as possible to avoid short-circuit of the oil
flow.
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Switch rotary valve to position II (filtering) (see illustration 6).
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Switch on the filter unit by using the on-off switch.
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Check the oil flow (the suction pipe may not be immersed to a sufficient depth in the oil tank).
Note:
When starting filtration, filling of the filter unit may take a few seconds.
›
Check the element for clogging, using the clogging indicator.
›
At the end of filtration, switch the rotary valve to position I (pumping). Pull the suction pipe out of the hydraulic tank of the
machine or plant and draw in air for max. 30 seconds. Residual oil from the filter unit will be returned via delivery pipe into the
hydraulic tank of the machine or plant.
›
Switch off the filter unit by using the on-off switch.
Illustration 6:
Switch settings of the rotary valve
