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PROBLEM
Pump will not run
Pump runs but no fluid is
pumped
Pump will not prime or retain
prime after operating
Flow rate is low
Shaft seal leaks
Motor runs too hot
TROUBLESHOOTING
PROBABLE CAUSES
1. No power or incorrect voltage
2. Brushes worn out
3. Motor has open circuit
4. Motor overheated
1. Air leak or kink in hose
2. Defective cam or impeller
3. Suction lift too high
4. Inlet clogged
5. Pump too far from liquid
1. Air leak or kink in hose
2. Defective cam or impeller
3. Seal worn
4. Gasket leaking
5. Groove worn in shaft at seal area
6. Suction lift too high
1. Air leak or kink in hose
2. Defective cam or impeller
3. Incorrect voltage
4. Inlet clogged
1. Seal worn
2. Groove worn in shaft at seal area
3. Pump head loose on motor
1. Incorrect voltage
2. Excessive discharge pressure
3. Impeller swollen
4. Liquid too viscous
5. Obstruction or kink in hose
6. Insufficient air flow on motor
CORRECTIVE ACTION
1. Supply correct voltage
2. Replace defective part
3. Replace defective part
4. If motor has auto-resetting thermal protector,
wait 15 minutes for motor to cool
1. Repair or replace
2. Replace defective part
3. Lower pump
4. Clean inlet
5. Relocate pump
1. Repair or replace
2. Replace defective part
3. Replace defective part
4. Replace defective part
5. Replace defective part
6. Lower pump
1. Repair or replace
2. Replace defective part
3. Supply correct voltage
4. Clean inlet
1. Replace defective part
2. Replace defective part
3. Repair
1. Supply correct voltage
2. Reduce pressure
3. Replace defective part
4. Reduce viscosity of liquid
5. Repair or replace
6. Be sure ample fresh air is available at the motor
3
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