Failure three gauge water pressure but still reasons: 1. too much resistance outlet pipe 3. 2. Turn right direction outlet pipe valve is not open impeller clogged 4. Solution: 1. Check or cord short pipe 2. Check Motor two intermodulation 3. Open the outlet valve 4. remove dirt impeller failure to reach the design flow rate of four reasons: 1. There are air intake 2. Due to lower the water level inside the submerged deep enough impeller blockage 3. 4. rotor portion severe wear solutions: 1. Check the leak site and the exclusion 2. extend deeper water pipe flooded the depth 3. Remove and drops in addition to foreign bodies 4. Replace the seal ring inspection multistage pump tubing and junction with or without loosening. . Hand rotation multistage centrifugal MD155-30X7 wear multi-stage pump, and proved multistage centrifugal pump is flexible. ⑵, was added to the bearing body bearing lubrication oil MD155-30X3 wear multi-stage pump, observe the oil level should be the subject of the centerline of the oil, lubricating oil should be replaced or supplemented. ⑶, unscrew the multi-stage centrifugal pump diversion drain plug MD155-30X4 wear multi-stage pump, filling water (or lead slurry). ⑷, shut the valve outlet Road and outlet pressure gauge and imports vacuum table. ⑸, move the motor wear multi-stage pump, and proved the motor rotation is correct. ⑹, multi-stage pump for long periods, the need to pump all apart, dry water, the moving parts and the junction coated with grease installed. ⑺, try to control multistage pump flow and head on the label of the range to ensure a multi-stage pump at maximum efficiency point of operation to achieve maximum energy savings. ⑻, multi-stage pump during operation, the bearing temperature must not exceed the ambient temperature of 35C, the maximum temperature not exceed 80C. ⑼, multistage pump found abnormal sound should immediately stop checking reasons. MD155-30X6 wear multi-stage pump, wear multi-stage pump, pump wear by Anguo City-yuan Pump Company. Anguo Shi Yuan Pump Co., Ltd. (www.shiyuanbeng.com) strong, credible, in Baoding centrifugal pump industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shiyuan water pump into the brilliant and you work for a better future!