Operating Instructions and Parts Manual

020598 and 020599

Troubleshooting Chart

Symptom

Little or no discharge and unit will not prime

Possible Cause(s)

Corrective Action

1. Casing not filled with

1. Fill pump casing. Using a foot-

water

valve will extend pump life and

 

facilitate immediate priming.

2. Total head too high.

2.Shorten suction lift and/or dis- charge head

3.Suction head exceeds that for which pump is designed

3.Shorten suction line and/or ver- tical distance from liquid to pump, install foot-valve and prime

4.

Impeller partially or com- 4. Disassemble pump and clean out

 

pletely plugged

 

impeller

5.

Hole or air leak in suction

5.

Repair or replace suction line

 

line

 

 

6.

Foot-valve too small

6.

Match foot-valve to piping or

 

 

 

install one size larger foot-

 

 

 

valve

7.

Impeller damaged

7.

Disassemble pump and replace

 

 

 

impeller

8.Foot-valve or suction line not submerged deep enough in water, pulling air

9.Insufficient inlet pressure or suction head

8.Submerge lower in water

9.Increase outlet pressure by adding more water to tank or increasing back pressure by turning gate-valve on dis- charge line to partially closed position

10.

Suction piping too small

10.

Increase pipe size to pump

 

 

 

inlet size or larger

11.

Casing gasket leaking

11.

Replace

12.

Suction or discharge line

12.

Open

 

valves closed

 

 

Loss of suction after satisfactory operation

1.Air leak in suction line

2.When unit was last turned off, water syphoned out of pump casing

1.Repair or replace suction line

2.Refill (reprime) pump casing before restarting

3.Suction head exceeds that for which pump was designed

3.Shorten suction line and/or ver- tical distance from liquid to pump, install foot-valve and prime

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