Troubleshooting
Troubleshooting
1. Follow Pressure Relief Procedure, page 5, before checking or repairing gun.
2. Check all possible problems and causes before dis- assembling gun.
Problem | Cause | Solution | |
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| Inadequate air supply pressure or | Increase air supply and/or clear | |
| restricted air lines | restriction | |
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| Closed or clogged valves | Open and/or clear | |
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Pump fails to operate | Clogged fluid lines, hoses, valves, | Relieve pressure. Clear obstruction | |
etc. | |||
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| Damaged air motor | Assess damage and 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 | Asses wear or damage and service | |
or seal | air motor | ||
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| Exhausted fluid supply | Refill and reprime or flush | |
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| Worn pump seals | Replace | |
Erratic pump operation |
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Damaged shovel tube | Replace | ||
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| Damaged check seat | replace pump piston or shovel rod | |
| (or other damaged part) | ||
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Pump operates, but output low on | Worn piston seal | Replace | |
upstroke | Damaged upper check seat | Replace pump piston | |
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Pump operates, but output low on | Worn fluid intake seal | Replace | |
downstroke | Damaged lower check seat | Replace shovel rod | |
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| Inadequate air supply or restricted | Increase air supply and /or clear | |
| air line | restriction | |
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Pump operates, but output low on | Closed or clogged valves | Open and/or clear | |
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Exhausted fluid supply | Refill fluid supply and reprime pump | ||
both strokes | |||
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| Clogged fluid lines, hoses, valves, | Relieve pressure. Clear obstruction | |
| etc. | ||
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| Worn seals | Replace | |
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Grease leaking from muffler plates | Worn throat seal | Replace | |
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308883S | 11 |
