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| Troubleshooting |
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Problem | Cause | Solution |
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Pump output is low | Strainer (82) is clogged | Clean strainer. |
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| Piston ball (206) is not seating | Service piston ball. Manual 310894. |
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| Piston packings are worn or damaged | Replace packings. Manual 310894. |
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| Replace | |
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| Intake valve ball is not seating properly | Clean intake valve. Manual 310894. |
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| Intake valve ball is packed with material | Clean intake valve. Manual 310894. |
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| Engine speed is too low | Increase throttle setting. Manual 310892. |
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| Tighten | |
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| bracket until it takes 15 lb of force to lock tension |
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| bar down |
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| Clutch is worn or damaged | Adjust or replace clutch. Page 10. |
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| Pressure setting is too low | Increase pressure. Manual 310892. |
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| Fluid filter (56), tip filter or tip is clogged or | Clean filter. Manual 310892 or 309639. |
| dirty |
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| Large pressure drop in hose with heavy | Use larger diameter hose and/or reduce |
| 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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Excessive paint leakage into throat | Throat packing nut is loose | Remove throat packing nut spacer. Tighten |
packing nut |
| throat packing nut just enough to stop leak- |
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| age. |
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| Throat packings are worn or damaged | Replace packings. Manual 310894. |
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| Displacement rod is worn or damaged | Replace rod. Manual 310894. |
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Fluid is spitting from gun | Air in pump or hose | Check and tighten all fluid connections. Rep- |
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| rime pump. Manual 310892. |
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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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| 310892. Check fluid supply often to prevent |
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| 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 as |
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| slowly as possible during priming. |
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| Intake valve is leaking | Clean intake valve. Be sure ball seat is not |
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| nicked or worn and that ball seats well. |
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| Reassemble valve. |
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| Pump packings are worn | Replace pump packings. Manual 310894. |
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| Paint is too thick | Thin the paint according to the supplier's |
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| recommendations |
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| Engine speed is too high | Decrease throttle setting before priming |
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| pump. Manual 310892. |
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Clutch squeaks each time clutch | Clutch surfaces are not matched to each other | Clutch surfaces need to wear into each other. |
engages | when new and may cause noise | Noise will dissipate after a day of run time. |
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High engine speed at no load | Misadjusted throttle setting | Reset throttle to 3700 engine rpm at no load |
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| Worn engine governor | Replace or service engine governor |
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Gallon counter not working | Bad sensor, broken or disconnected wire. | Check connections. Replace sensor or |
| Displaced or missing magnet. | wire. Reposition or replace magnet. |
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No display, sprayer operates | Display damaged or has bad connection | Check connections. Replace display. |
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311046H | 7 |