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 | 1. | Spray tip worn | 1. | Follow Pressure Relief Procedure on |
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| page 8, then replace tip. See your sepa- |
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| rate gun or tip manual. |
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| 2. | Spray tip clogged | 2. | Relieve pressure. Check and clean spray |
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| tip. |
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| 3. | Paint supply | 3. | Refill and reprime pump. |
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| 4. | Intake strainer clogged | 4. | Remove and clean, then reinstall |
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| 5. | Intake valve ball and piston ball | 5. | Remove intake valve and clean. Check |
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| are not seating properly |
| balls and seats for nicks; replace if neces- |
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| sary; see pump manual 310643 or |
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| 310894. Strain paint before using to |
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| remove particles that could clog pump. |
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| 6. | Suction hose connections | 6. | Tighten any loose connections. Check for |
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| missing or damaged seals. |
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| 7. | Fluid filter, tip filter, or tip is | 7. | Clean filter; see operation manual. |
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| clogged or dirty. |
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| 8. | Prime valve leaking | 8. Relieve pressure. Repair prime valve. | |
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| 9. | Verify pump does not continue to | 9. | Service pump; see pump manual 310643 |
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| stroke when gun trigger is |
| or 310894. |
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| released. (Prime valve not leak- |
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| ing.) |
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| 10. | Leaking around throat packing | 10. | Replace packings; see pump manual. Also |
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| nut which may indicate worn or |
| check piston valve seat for hardened paint |
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| damaged packings. |
| or nicks and replace if necessary. Tighten |
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| packing |
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| 11. | Pump rod damage | 11. | Repair pump. See pump manual 310643 |
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| or 310894. |
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| 12. | Low stall pressure | 12. | Turn pressure knob fully clockwise. Make |
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| sure pressure control knob is properly |
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| installed to allow full clockwise position. If |
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| problem persists, replace pressure trans- |
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| ducer. |
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| 13. | Piston packings are worn or | 13. | Replace packings; see pump manual |
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| damaged |
| 310643 or 310894. |
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| 14. | 14. | Replace | |
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| aged |
| or 310894. |
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| 15. | Intake valve ball is packed with | 15. | Clean intake valve; see pump manual |
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| material |
| 310643 or 310894. |
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| 16. | Pressure setting is too low | 16. | Increase pressure; see pump manual |
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| 310643 or 310894. |
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| 17. | Large pressure drop in hose with | 17. | Use larger diameter hose and/or reduce |
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| heavy materials |
| overall length of hose. Use of more than |
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| 100 ft of 1/4 in. hose significantly reduces |
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| performance of sprayer. Use 3/8 in. hose |
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| for optimum performance (50 ft minimum). |
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3A0157A | 11 |
