Disassembly and assembly sequence of explosion-proof self-priming sewage oil pump

Disassembly and assembly order of explosion-proof self-priming sewage oil pump:

1. Remove the motor or remove the coupling.

2. Remove the bearing assembly, check the radial clearance between the impeller and the front ring, and check whether the impeller nut is loose.

3. Remove the impeller nut, pull out the impeller, and check the radial clearance between the impeller and the rear sealing ring.

4. Loosen the tightening screws of the mechanical seal, pull out the moving ring part of the mechanical seal, check the fit of the end surfaces of 

the dynamic and static rings, and check the sealing condition of the "O"-shaped seal ring (or buffer pad).

5. Rotate out the tightening nut of the coupling and pull out the coupling.

6. Remove the bearing end cover and remove the pump shaft and bearing.

7. Assemble in reverse order during installation.