Troubleshooting
Troubleshooting
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| 1. Relieve the pressure, page 9. | |
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| 2. Check all possible causes and problems before dis- | |
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| assembling the pump. | |
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| Problem |
| Cause | Solution | ||||
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| Pump fails to operate. | Restricted line or inadequate air supply; | Clear; increase air supply. Check that | ||||||
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| closed or clogged valves. | valves are open. | ||
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| Obstructed fluid hose or gun/valve; fluid | Open, clear*; use hose with larger ID. | ||
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| hose ID is too small. |
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| Fluid dried on displacement rod. | Clean; always stop pump at bottom of | ||
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| stroke; keep |
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| patible solvent. |
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| Dirty, worn, or damaged motor parts. | Clean or repair. See manual 311238. | ||
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| Pump operates, but output low on both | Restricted line or inadequate air supply; | Clear; increase air supply. Check that | ||||||
| strokes. | closed or clogged valves. | valves are open. | ||||||
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| Obstructed fluid hose or gun/valve; fluid | Open, clear*; use hose with larger ID. | ||
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| hose ID is too small. |
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| Bleeder valve open. | Close. | ||
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| Worn packings in displacement pump. | Replace packings. See displacement | ||
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| pump manual 311825 or 312745. |
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| Pump operates, but output low on down- | Held open or worn intake valve. | Clear valve; service. See displacement | ||||||
| stroke. |
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| pump manual 311825 or 312745. | ||||
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| Pump operates, but output low on | Held open or worn piston valve or pack- | Clear valve; replace packings. See dis- | ||||||
| upstroke. | ings. | placement pump manual 311825 or | ||||||
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| 312745. |
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| Erratic or accelerated pump speed. | Exhausted fluid supply. | Refill and prime. | ||||||
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| Held open or worn piston valve or pack- | Clear valve; replace packings. See dis- | ||
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| ings. | placement pump manual 311825 or | ||
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| 312745. |
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| Held open or worn intake valve. | Clear valve; service. See displacement | ||
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| pump manual 311825 or 312745. |
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*To determine if the fluid hose or gun is obstructed, relieve the pressure, page 9. Disconnect the fluid hose and place a container at the pump fluid outlet to catch any fluid. Turn on the air power just enough to start the pump. If the pump starts, the obstruction is in the fluid hose or gun.
12 | 312585E |
