Mud pump before starting, check that the inlet and the outlet pipe is blocked, to the front and rear bearings add butter, check that the packing is charged. Mud pump should be equipped with a high pressure water pump, will be larger than the pump pressure of water lost to leakage prevention filler, filler protection shall not close the flushing pump mud pump, otherwise, the seal quickly wear. Clearance between the impeller and the boards is reasonable, life has a great influence on the mud pump. Clearance is not reasonable, vibration and noise generated during pump operation, flow very quickly damaged when replacing the impeller, shall take care that the clearances meet the drawings, the gap adjustment can be conducted via adjustment screws on the rear bearing. Allows suction of the mud pump is in the water when the determination of transmission, suction slurry should consider the impact of mud on the suction capacity.