Troubleshooting
Troubleshooting
Check all other possible problems and solutions 
before disassembling the pump. Before you trouble- shoot problems using the table below, relieve the pressure and disconnect the pump fluid line. If the pump starts when the air is turned on again, the fluid line, dispensing valve, etc., is clogged.
Problem | Cause | Solution |
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Pump fails to operate | Inadequate air supply pressure or | Increase air supply; clear |
| restricted air lines |
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| Closed or clogged dispensing valve | Open; clear |
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| Clogged fluid lines, hoses, valve, etc. | Clear |
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| Damaged air motor | Service air motor |
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| Exhausted fluid supply | Refill and reprime or flush |
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Continuous air exhaust | Worn or damaged air motor gasket, | Service air motor |
| packing, seal, etc. |
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Erratic pump operation | Exhausted fluid supply | Refill and reprime or flush |
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Pump operates, but output low | Held open or worn intake valve or pis- | Clear; service |
on down stroke | ton packings |
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Pump operates, but output low | Held open or worn piston ball or piston | Clear; service |
on up stroke | packings |
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Pump operates, but output low | Inadequate air supply pressure or | Increase air supply; clear |
on both strokes | restricted air lines |
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| Closed or clogged valves | Open; clean |
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| Exhausted fluid supply | Refill and reprime or flush |
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| Clogged fluid lines, hoses, valves, etc. | Clear |
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309868D | 7 |
