WQK Grinder Sewage Pump – Common Problems & Quick Solutions
The pump’s cutting mechanism ensures long fibers and soft solids are shredded before discharge, preventing pipe blockages and reducing maintenance costs.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump won’t start | Power not connected / phase loss / impeller stuck | Check wiring, adjust impeller gap to 0.2–0.5mm |
| Low flow or head | Impeller worn / reverse rotation / low voltage | Replace impeller, swap two phase wires, adjust voltage |
| Poor cutting performance | Gap too large / blades dull | Adjust gap, replace impeller and bottom plate |
| Protector trips repeatedly | Low insulation / motor overload / phase failure | Dry motor, check voltage, clean debris |
Maintenance Tips:
•
After pumping thick slurry, run pump in clean water for a few minutes
•
Change oil every 300–500 hours (use #10 machine oil)
•
Check insulation resistance regularly (min 0.5 MΩ)
•
Test seal integrity at 0.2 MPa after repair
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