TM 10-4320-321-13&P FORM 5S2583 MODELS 2P121 THRU 2P128 & WP373 THRU 2P380 01615 Troubleshooting Chart SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION Pump will not prime or retain 1.  Air leak in suction line 1.  Repair or replace. prime after operating 2.  Suction line inlet above liquid 2.  Submerge suction line in liquid. level Pump will not start or run 1.  Improperly wired 1.  Check voltage supply outlet and rewire motor connections, if necessary. 2.  Blown fuse or open circuit 2.  Replace fuse or close circuit breaker breaker. 3.  Loose, broken, or incorrect 3.  Rewire any incorrect circuits. wiring Tighten connections, replace defective wires. 4.  Defective pressure switch 4.  Adjust switch setting. Clean contacts with emery cloth, if dirty.  Replace if necessary. 5.  Piping to pressure switch plugged 5.  Clean or replace piping. 6.  Motor shorted out 6.  Replace motor. Pump runs, but no fluid 1.  Faulty suction piping 1.  Replace. 2.  Pump located too far from fluid 2.  Relocate. 3.  Gate valve closed 3.  Open. 4.  Clogged strainer 4.  Clean or replace. 5.  Fouled foot valve 5.  Clean or replace 6.  Suction line inlet above liquid 6.  Submerge suction line in liquid. level Liquid drips from point where Damaged mechanical seal Replace. shaft enters the pump housing, (See MECHANICAL SEAL when pump is full of liquid REPLACEMENT) Pump starts and stops too often 1.  Faulty pressure switch 1.  Repair or replace 2.  Leak in suction valve 2.  Repair. 3.  Leak in foot-valve 3.  Repair or replace. Excessive noise while pump is in 1.  Pump not secured to firm 1.  Secure properly. Operation foundation 2.  Piping not supported to relieve 2.  Make necessary adjustments. any strain on pump assembly 3.  Motor improperly connected. 3.  Rewire electrical connections. -8-