Troubleshooting
Troubleshooting
1.Relieve the pressure, page 12, before checking or servicing the equipment.
2.Check all possible problems and causes before dis- assembling the pump.
Problem | Cause | Solution |
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Pump fails to operate. | Restricted line or inadequate air sup- | Clear line or increase air supply. |
| ply; closed or clogged valves. | Check that valves are open. |
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| Obstructed fluid hose or gun; fluid | Open, clear*; use hose with larger ID. |
| hose ID is too small. |
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| Fluid dried on the displacement rod. | Clean; always stop pump at the bot- |
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| tom of its stroke. Keep |
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| with compatible fluid. |
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| Dirty, worn, or damaged air motor | Clean or repair air motor. See man- |
| parts. | ual 309462. |
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Pump operates, but output is low on | Restricted line or inadequate air sup- | Clear line or increase air supply. |
both strokes. | ply; closed or clogged valves. | Check that valves are open. |
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| Obstructed fluid hose or gun; fluid | Open, clear*; use hose with larger ID. |
| hose ID is too small. |
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| Worn packings in displacement | Replace packings. |
| pump. |
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Pump operates, but output is low on | Held open or worn intake valve. | Clear valve, service; see manual |
downstroke. |
| 309462. |
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Pump operates, but output is low on | Held open or worn piston valve or | Clear valve; replace packings. See |
upstroke. | packings. | manual 309462. |
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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 | Clear valve; replace packings. See |
| packings. | manual 309462. |
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| Held open or worn intake valve. | Clear valve, service; see manual |
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| 309462. |
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Fluid being pumped is visible in the | Worn throat packings. | Replace throat packings; see manual |
level display. |
| 309462. Clean level display. |
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*To determine if the fluid hose or gun is obstructed, relieve the pressure. Disconnect the fluid hose and place a con- tainer at the pump fluid outlet to catch any fluid. Turn on the air just enough to start the pump. If the pump starts when the air is turned on, the obstruction is in the hose or gun.
16 | 309463N |
