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| To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin, or injury |
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| from moving parts, always follow the Pressure Relief Procedure Warning as given on page 2 or 8 before |
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| troubleshooting or repairing your sprayer. |
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Check everything in the Troubleshooting Chart before disassembling the sprayer.
TROUBLESHOOTING
PROBLEM | CAUSE | SOLUTION | |
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Gas engine doesn'twork properly. |
| Consult engine manual, supplied. | |
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Gas engine operates, but displace- | Hydraulic motor stalled. | See "Starting the Sprayer;'page 8. | |
ment pump doesn'toperate. | Pressure setting too low. | Increase pressure. See page 9. | |
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| Displacement pump outlet filter (if | Clean the filter. | |
| used) dirty or clogged. |
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| Tip or tip filter (if used) clogged. | Remove tip and/or filter and clean. | |
| Hydraulic fluid too low. | Shut off sprayer and add fluid im- | |
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| mediately. * See page 5. | |
| Hydraulic pump worn or damaged. | Return sprayer for repair. | |
| Hydraulic motor worn or damaged. | Return sprayer for repair. | |
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| Displacement pump rod seized by | Service pump. See page 13. | |
| dried paint. |
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Displacement pump operates, but | Piston ball check not seating properly. | Service piston ball check. See page 13. | |
output is low on upstroke. | Piston packings worn or damaged. | Replace packings. See page 13. | |
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Displacement pump operates but out- | Piston packings worn or damaged. | Replace packings. See page 13. | |
put is low on downstroke and/or on | Intake valve ball check not seating | Service intake valve ball check. See | |
both strokes. | |||
properly. | page 13. | ||
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Paint leaks into | Loose | Tighten just enough to stop leakage. | |
| Throat packings worn or damaged. | Replace packings. See page 13. | |
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Excessive leakage around hydraulic | Piston rod or seal worn or damaged. | Replace these parts. See manual | |
motor piston rod wiper. |
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Fluid delivery is low. | Pressure setting too low. | Increase pressure. | |
| Displacement pump outlet filter (if | Clean filter. | |
| used) dirty or clogged. |
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| Hydraulic pump worn or damaged. | Return sprayer for repair. | |
| Hydraulic motor wom or damaged. | Return sprayer for repair. | |
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| Large pressure drop in fluid hose. | Use larger diameter hose. | |
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Spitting from gun. | Air entrained in fluid pump or hose. | Check for loose connections on suction | |
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| assembly, tighten, then reprime pump. | |
| Fluid supply is low or empty. | Refill supply container. | |
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*Check the hydraulic fluid level often. Do not allow it to become too low. Use only Graco approved hydraulic fluid; see page 5.
