How to replace mechanical seal in ZX self-priming sanitary pump?

The ZX self-priming pump uses 104-22 or 108-25 mechanical seals depending on model size.

Common failure signs include fluid leakage, abnormal noise and reduced priming performance.

Replacement requires proper disassembly sequence using special puller tools to protect shaft surfaces.

New seals must be pressed in evenly with static ring facing pump chamber, using food-grade lubricant on O-rings.

Post-installation checks include manual rotation test and observing leakage during trial operation.