1, always check the oil level and oil quality of hydraulic oil, oil quality should be light and transparent, no emulsion or turbidity phenomenon, otherwise it should be replaced.

  2. Fill the tank with grease, empty the tank, and then fill it up.

  3, check the piston of concrete pump, the piston should be well sealed, no mortar infiltration into the water tank.

  4. Check the cut-off ring and eyeglass plate. The clearance should not be more than 2L.

  5, check the lubrication system work, should be able to see the progressive oil separator indicator rod back and forth movement, s pipe swing arm end bearing position and stir bearing position, etc. 

  6, check the function of the electrical components is normal.

  7, check the distribution valve reversing, agitator positive and negative rotation is normal work.

  8, check the outside of the cooler, if there is dirt should be cleaned immediately, otherwise easy to cause the oil temperature overheating.

  9. Check the indication of the vacuum meter, it should be in the green area, no more than 0.04. The vacuum degree of oil absorption should be less than 0.02 MPA and the vacuum value of return pressure should be less than 0.35 MPA.

  10. Check the abrasion degree of the concrete pipe by percussion, and check whether the pipe joints are sealed and good.

  11. Check the hydraulic system whether there is oil leakage, oil leakage phenomenon.