How does the cement slurry solidify inside the concrete pump?
Suggested after the completion of each operation, the pump should be about to clean!
If the solidification is very serious, it is recommended to use ultra-high pressure water jet rinse, this water knife can be directly cut concrete, but the price is relatively large.
With a clean sponge ball for washing; if the relative to the outside, you can have a small shovel for processing, can only be visible outside the concrete.
Be sure to stop the pump, and then add water and detergent to the pump or detergent or other additives, or other chemical reagents, the first positive pump cleaning, and then anti-pump cleaning, repeated several times, and finally