Troubleshooting
LOW OR FLUCTUATING OUTPUT
TYPE OF PROBLEM | WHAT TO CHECK | WHAT TO DO | ||
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| If check is OK, go to next check | When check is not OK refer to this column | |
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Motor runs and pump strokes | 1. | Paint supply. | 1. | Refill and reprime pump. |
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| 2. | Intake strainer clogged. | 2. | Remove and clean, then reinstall. |
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| 3. | Suction tube or fittings loose. | 3. | Tighten; use thread sealant or sealing tape |
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| on threads if necessary. |
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| 4. | To see if intake valve ball and piston ball are | 4. | Remove intake valve and clean. Check |
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| seating properly. See page 26. |
| balls and seats for nicks; replace if neces- |
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| sary, page 26. Strain paint before using to |
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| remove particles that could clog pump. |
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| 5. | Leaking around throat packing nut which may | 5. | Replace packings, page 26. Also check |
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| indicate worn or damaged packings. See |
| piston valve seat for hardened paint or |
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| page 26. |
| nicks and replace if necessary. Tighten |
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| packing |
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| 6. | Pump rod damage. | 6. | Repair pump, page 26. |
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| 7. | Capacitor failure. Visually inspect capacitor | 7. | Replace capacitor. |
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| near terminals. Ensure that orange safety re- |
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| lief plug is intact. |
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Motor runs but pump does not | 1. | Displacement pump pin (9a) (damaged or | 1. | Replace pump pin if missing. Be sure re- |
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| missing), page 26. |
| tainer spring (9b) is fully in groove all |
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| around connecting rod, page 26. |
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| 2. | Connecting rod assembly (9) for damage, | 2. | Replace connecting rod assembly, |
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| page 24. |
| page 24. |
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| 3. Gears or drive housing, page 24. | 3. | Inspect drive housing assembly and gears | |
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| for damage and replace if necessary, |
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| page 24. |
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Motor is hot and runs intermit- | 1. | Be sure ambient temperature where sprayer | 1. | Move sprayer to shaded, cooler area if pos- |
tently |
| is located is not more than 115 _F (46 _C) and |
| sible. |
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| sprayer is not located in direct sun. |
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| 2. | Motor has burned windings indicated by re- | 2. | Replace motor. See page 25, Motor Re- |
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| moving positive (red) brush and seeing |
| placement. |
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| burned adjacent commutator bars. |
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| 3. | Tightness of pump packing nut. Overtighten- | 3. | Loosen packing nut. Check for leaking |
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| ing tightens packings on rod, restricts pump |
| around throat. Replace pump packings if |
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| action and damages packings. |
| necessary. See pump manual 309060. |
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