Operating Instructions and Parts Manual | 020598 and 020599 | |
Troubleshooting Chart (continued) | ||
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Symptom | Possible Cause(s) | Corrective Action |
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Loss of suction after | 4. Insufficient inlet pressure | 4. Increase inlet pressure by adding |
satisfactory operation | or suction head | more water to tank or increasing |
(continued) |
| back pressure by turning gate |
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| valve on discharge line to partial- |
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| ly closed position |
| 5. Clogged | 5. Unclog, clean or replace as neces- |
| strainer or pump | sary |
Pump overloads driver (gas engine shuts off before complete hose fill)
1.Total head lower than pump rating. Unit deliver- ing too much water
2.Specific gravity and vis- cosity of liquid being pumped different than the pump rating
3.Speed too high
1.Increase back pressure on pump by turning gate valve on dis- charge line to partially closed position that will not overload motor
2.Pump is designed for water, use only for liquids which have simi- lar characteristics.
3.Check and correct, lower speed
Pump vibrates and/or makes excessive noise
1.Mounting plate or foun- dation not rigid enough
2.Foreign matter in pump causing unbalance
3.Impeller bent
4.Cavitation present
1.Reinforce
2.Disassemble pump and remove
3.Replace impeller
4.Check suction line for proper size and check valve in suction line if completely open, remove any sharp bends before pump and shorten suction line
Pump runs but no fluid 1. Faulty suction piping (air leak)
2. Pump located too far from fluid source
3. Gate valve closed
4. Clogged strainer
5. Fouled
6. Discharge height too great
1.Replace
2.Relocate
3.Open
4.Clean or replace
5.Clean or replace
6.Lower the height
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