5
TROUBLESHOOTING GUIDE
The following are some common causes of problems that may arise.
SYMPTOMS
PROBABLE CAUSE
RECOMMENDED ACTION
Will Not Prime
No liquid
Fill tank with liquid.
Air leak in suction line
Tighten all joints or remake using new
compound.
Blocked suction line
Clean strainer or suction line.
Worn seal
Install new seal.
Suddenly Stops
Clogged strainer or impeller
Clean debris.
Pumping
Missing or broken impeller key
Replace.
Slowly Stops
Clogged impeller, diffuser, lines or loose
Clean debris and use strainer. Tighten filler
Pumping
filler plug
plug.
Excessive Leakage
Worn seal
Replace seal.
From Seal Well Vent
Will Not
Worn seal
Replace seal.
Hold Prime
Suction lift too high
Relocate pump closer to supply.
Air leak in suction line
Fix leak.
Performance Poor
Worn impeller or seal
Replace with new impeller or seal.
Suction lift too high
Relocate pump closer to supply.
Low Flow
Motor not up to speed, low voltage
Larger lead wires.
Or Pressure
Air leak
Tighten all joints or remake using new
compound.
Blocked line
Clean strainer or suction line.
Worn seal
Install new seal.
Incorrect rotation (three phase motor)
Interchange any two leads to reverse the
rotation.
Noisy Operation
Worn motor bearings
Replace.
Low discharge head
Throttle discharge.
Debris lodged in impeller
Disassemble pump and clean out.
Cavitation
Improve suction conditions.
