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| Troubleshooting |
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| WHAT TO CHECK | WHAT TO DO |
TYPE OF PROBLEM | If check is OK, go to next check | When check is not OK, refer to this column |
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Pump output is low | Pump rod damage | Repair pump. See pump manual. |
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| Low stall pressure | Turn pressure knob fully clockwise. Make sure |
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| pressure control knob is properly installed to |
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| allow full clockwise position. If problem per- |
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| sists, replace pressure transducer. |
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| Piston packings are worn or dam- | Replace packings; see pump manual. |
| aged |
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| Replace | |
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| Intake valve ball is packed with mate- | Clean intake valve; see pump manual. |
| rial |
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| Pressure setting is too low | Increase pressure; see pump manual. |
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| Large pressure drop in hose with | Use larger diameter hose and/or reduce overall |
| heavy materials | length of hose. |
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| Check to see if Amp switch (10/16 or | Switch to 16A or 20A setting. Change to circuit |
| 15/20) is on low setting. Make sure | that provides 16A or 20A. Change to less |
| circuit is able to provide high setting. | loaded circuit. |
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Motor runs but pump does | Displacement pump pin damaged or | Replace pump pin if missing. Be sure retainer |
not stroke | missing; see pump manual. | spring is fully in groove all around connecting |
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| rod; see pump manual. |
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| Connecting rod assembly damaged; | Replace connecting rod assembly; see pump |
| see pump manual. | manual. |
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| Gears or drive housing damaged. | Inspect drive housing assembly and gears for |
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| damage and replace if necessary; see pump |
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| manual. |
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Excessive paint leakage | Throat packing nut is loose | Remove throat packing nut spacer. Tighten |
into throat packing nut |
| throat packing nut just enough to stop leakage. |
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| Throat packings are worn or dam- | Replace packings; see pump manual. |
| aged |
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| Displacement rod is worn or dam- | Replace rod; see pump manual. |
| aged |
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Fluid is spitting from gun | Air in pump or hose | Check and tighten all fluid connections. Cycle |
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| pump as slowly as possible during priming. |
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| Tip is partially clogged | Clear tip; see Operation manual. |
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| Fluid supply is low or empty | Refill fluid supply. Prime pump; see pump man- |
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| ual. Check fluid supply often to prevent running |
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| pump dry. |
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332916C | 25 |
