Troubleshooting
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7.
Relieve pressure before you check or service any system equipment.
WARNING
MOVING PARTS HAZARD Never operate the pump with the warning plate or the identification plate removed. These plates protect your
fingers from pinching or amputation by moving parts in the air motor.
Problem | Cause | Solution |
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Pump fails to operate | Inadequate air supply pressure or | Increase air supply and/or |
| restricted air lines | clear restriction. |
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| Closed or clogged pump valves | Open and/or clean. |
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| Clogged fluid line, hose, valve, or | Relieve pressure. |
| other accessory | Clear obstruction. |
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| Damaged air motor | Assess damage, and service |
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| 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 | Assess wear or damage, |
| gasket or seal | and service air motor. |
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Erratic pump operation | Exhausted fluid supply | Refill and reprime or flush |
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| Worn pump seals | Replace. |
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| Damaged shovel tube | Replace. |
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| Damaged check seat | Replace pump piston or |
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| shovel rod (or other dam- |
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| aged part). |
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Pump operates, but output low on | Worn piston seal | Replace. |
up stroke |
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| Damaged upper check seat | Replace pump piston. |
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Pump operates, but output low on | Worn fluid intake seal | Replace. |
down stroke |
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| Damaged lower check seat | Replace shovel rod. |
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Pump operates, but output low on | Inadequate air supply pressure or | Increase air supply and/or |
both strokes | restricted air lines | clear restriction. |
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| Closed or clogged pump valves | Open and/or clean. |
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| Exhausted fluid supply | Refill fluid supply, and |
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| reprime pump. |
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| Clogged fluid line, hose, valve, or | Relieve pressure. |
| other accessory | Clear obstruction. |
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| Worn seals | Replace. |
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Grease leaking from muffler plates | Worn throat seal | Replace. |
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