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| Troubleshooting |
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Problem | Cause | Solution |
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Pump output is low | Strainer (16) is clogged | Clean strainer. |
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| Piston ball (206) is not seating | Service piston ball. Manual 309250. |
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| Piston packings are worn or damaged | Replace packings. Manual 309250. |
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| Replace | |
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| Intake valve ball is not seating properly | Clean intake valve. Manual 309250. |
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| Intake valve ball is packed with material | Clean intake valve. Manual 309250. |
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| Engine speed is too low | Increase throttle setting. Manual 310802. |
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| Clutch is worn or damaged | Adjust or replace clutch. Page 9. |
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| Pressure setting is too low | Increase pressure. Manual 310802. |
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| Fluid filter (29), tip filter or tip is | Clean filter. Manual 310802 or 309639. |
| clogged or dirty |
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| Large pressure drop in hose with | Use larger diameter hose and/or |
| heavy materials | reduce overall length of hose. Use of |
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| more than 100 ft of 1/4 in. hose signifi- |
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| cantly reduces performance of sprayer. |
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| Use 3/8 in. hose for optimum perfor- |
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| mance (50 ft minimum). |
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Excessive paint leakage into throat | Throat packing nut is loose | Remove throat packing nut spacer. |
packing nut |
| Tighten throat packing nut just enough |
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| to stop leakage. |
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| Throat packings are worn or damaged | Replace packings. Manual 309250. |
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| Displacement rod is worn or damaged | Replace rod. Manual 309250. |
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Fluid is spitting from gun | Air in pump or hose | Check and tighten all fluid connections. |
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| Prime pump. Manual 310802. |
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| Tip is partially clogged | Clear tip. Manual 309639. |
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| Fluid supply is low or empty | Refill fluid supply. Prime pump. Manual |
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| 310802. Check fluid supply often to |
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| prevent running pump dry. |
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Pump is difficult to prime | Air in pump or hose | Check and tighten all fluid connections. |
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| Reduce engine speed and cycle pump |
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| as slowly as possible during priming. |
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| Intake valve is leaking | Clean intake valve. Be sure ball seat is |
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| not nicked or worn and that ball seats |
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| well. Reassemble valve. |
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| Pump packings are worn | Replace pump packings. Manual 309250. |
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| Paint is too thick | Thin the paint according to the sup- |
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| plier's recommendations |
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| Engine speed is too high | Decrease throttle setting before prim- |
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| ing pump. Manual 310802. |
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Clutch squeaks each time clutch | Clutch surfaces are not matched to each | Clutch surfaces need to wear into each |
engages | other when new and may cause noise | other. Noise will dissipate after a day of |
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| run time. |
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High engine speed at no load | Misadjusted throttle setting | Reset throttle to 3300 engine rpm at no |
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| load |
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| Worn engine governor | Replace or service engine governor |
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310813 Rev C | 7 |
