1. When maintaining plastic submerged pumps, first remove the pump from the storage tank, remove the motor and machine base, remove the lower pump casing, remove the lower shaft sleeve and impeller (note the anti-corrosion layer on the pump shaft) and loosen the upper The bearing is seated with 6 hexagonal bolts, and then the positive pump shaft and bearing parts can be pulled out together for maintenance.

2. When the submerged pump is overhauled and reassembled after replacing the wearing parts, please install the bearing seat and the bearing together on the upper part of the pump shaft, seal the upper and lower bearing covers, install the coupling and tighten the round nut, and correct the pump shaft. For bending degree, insert the pump with bearing seat downwards into the pump body, then install the bearing seat on the middle seat, adjust the gap between the impeller and the upper and lower pump casings, and dip the impeller, the lower shaft sleeve and the impeller cap together with phenolic cement. On the pump shaft, wait until the phenolic cement is completely cured before installing the lower pump cover. After assembly, turn the pump shaft on the coupling by hand to see if it is normal. For example, when replacing the bearing and pump shaft, first remove the round nut and coupling at the upper end of the pump shaft, loosen the 12 screws of the upper and lower bearing covers, and drive the bearing seat upwards.