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The measures of blockage

When the blockage, should take the following measures:


① repeated anti pumps and positive pumps running, gradually returned to suck out the concrete hopper, stirred and then re-pumped.


② with a mallet percussion and other methods to identify the blockage site, repeated anti-pump and pump operation after being hit song to be concrete, to exclude blockage.


③ When the above two methods are invalid, after the concrete relief should open blocked sites, pumping again after blockages to be discharged.