Little or no discharge
- Casing not initially filled with water. (Fill pump casing---prime pump)
- Total head too high. (Shorten suction and/or head)
- Suction lift too high , or too long (Lower suction lift, install foot valve and prime, or shorten length of suction line)
- Impeller plugged (Clean impeller)
- Hole or air leak in suction line (Repair or replace; do not use Teflon tape;use pipe sealing compound)
- Foot valve too small (Match foot valve to piping or install one size larger foot valve)
- Foot valve or suction line not submerged deep enough in water (Submerge lower in water--at least 3 feet)
- Impeller damaged (Replace impeller)
- Insufficient inlet pressure or suction head ( Increase inlet pressure by adding more water to tank or increasing back pressure)
- Suction piping too small (Increase to pump inlet size or one size larger)
- Motor wired incorrectly (Check wiring diagram)
- Casing gasket or "O" ring leaking (Replace)
- Suction or discharge valve closed (Open)
- Pump flow is greater than well flow capacity (Match pump flow to well capacity)
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Loss of suction
- Air leak in suction line (Repair & replace)
- Suction lift too high (Lower suction lift, install foot valve and prime)
- Insufficient inlet pressure or suction head (Increase inlet pressure by adding more water to tank or increasing back pressure)
- Clogged foot valve check valve or strainer (Unclog)
- Defective foot valve or check valve (Replace)
- Defective priming hose bibb on suction pipe (Replace)
- Defective well (Repair or replace)
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Motor Overheats and Shuts Off (Overload) - Motor voltage does not match power supply voltage (Check motor connection against wiring diagram on the motor nameplate and against the power supply voltage)
- Improper wire size (Consult with a licensed electrician or refer to the National Electrical Code for definite guide to wire sizeand circuit protection devices)
- Impeller is rubbing against pump case or not turning freely (Dismantle pump, unclog or replace the impeller)
- Low voltage at the motor (Make sure electrical connections are tight)
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Pump leaks at shaft -
Worn mechanical seal (Replace mechanical seal)
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Pump vibrates and/or makes excessive noise - Mounting plate or foundation not rigid enough (Reinforce)
- Foreign material in pump (Dismantle pump and clean)
- Impeller damaged (Replace impeller)
- Worn motor bearings (Replace bearings)
- Suction lift too high ( Lower suction lift, install foot valve and prime)
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Pump will not deliver water or develop pressure
- No priming water in casing (Fill pump casing)
- Mechanical seal leaking (Replace mechanical seal)
- Leak in suction line (Repair or replace)
- Discharge line is closed and priming air has nowhere to go (Open)
- Suction line or valve is closed (Open)
- Pump is down (Replace worn parts)
- Foot valve or check valve is leaking ( Replace valve)
- Suction screen clogged (Clean or replace)
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Pump will not prime
- Worn mechanical seal (Replace mechanical seal)
- Not enough priming water (Stop motor, fill casing with water, re-prime)
- Pump wired incorrectly (Check the motor connection against the wiring diagram on the motor nameplate. Match the connection voltage to the voltage of the power supply)
- Plugged impeller, check valve, suction piping, well point, foot valve or check valve (Check and unclog as required)
- Foot valve is sitting in sand or mud, or is stuck shut or leaks (Reposition foot valve, unclog or replace)
- Leaks (Check all connections for airtightness. Repair or replace defective components)
- Leaky pump mechanical shaft seal (Replace shaft seal)
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Pump will not start or run
- Improperly wired (Check wiring against diagram on motor)
- Blown fuse or open circuit breaker (Replace fuse, reset circuit breaker)
- Loose or broken wiring (Tighten connections, replace broken wiring
- Stone or foreign object lodged in impeller (Dismantle pump and remove foreign object)
- Motor shorted out (Replace motor)
- Thermal overload has opened circuit (Allow unit to cool, restrart after reason for overload has been determined
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TIMES