Operating Instructions and Parts Manual
Troubleshooting Guide
Symptom
cause
solution
Low pressure and/or pump runs rough
1. | Worn or wrong size tip | 1. | Replace with tip of proper size |
2. | Inlet filter on pump clogged | 2. | Clean. Check more frequently |
3. | Worn water seals, abrasives in water, | 3. | Check filter. Replace water seals. See service center |
| or natural wear |
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| 4. | Fouled or dirty inlet or discharge | 4. | Clean inlet and discharge valve assemblies. Check |
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| valves |
| filter |
| 5. | Restricted inlet | 5. | Check garden hose, may be collapsed or kinked. |
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| Check inlet water flow |
| 6. | Worn inlet or discharge valves | 6. | Replace worn valves |
| 7. | Leaking high pressure hose | 7. | Replace high pressure hose |
| 8. | Pump drawing in air | 8. | Ensure hoses and fittings are tight |
| 9. | Unloader valve seat faulty or worn | 9. | Check and replace |
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Water leakage from under | Worn water seals | Install new water seals. See service center | ||
pump manifold |
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Water in pump crankcase | 1. | Humid air condensing inside | 1. | Change oil as specified in maintenance schedule |
(milky oil) |
| crankcase |
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| 2. | Oil seals leaking | 2. | Install new oil seals. See service center |
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Frequent or premature failure | 1. | Scored damaged or worn plungers | 1. | Install new plungers. See service center |
of the pump water seals | 2. | Abrasive material in the fluid | 2. | Install proper filtration on pump inlet plumbing |
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| 3. | Inlet water temperature too high | 3. | Check water temperature; may not exceed 100° F. |
| 4. | Overpressurizing pump | 4. | Do not modify any factory set adjustments. |
| 5. | Excessive pressure due to partially | 5. | Clean or replace tip. |
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| plugged or damaged tip |
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| 6. | Pump running too long without | 6. | Never run pump more than 2 minutes without |
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| spraying |
| spraying |
| 7. | Pump running dry | 7. | Do not run pump without water |
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Strong surging at the inlet and | Foreign particles in the inlet or discharge | Clean or replace valves. See service center | ||
low pressure | valve or worn inlet and/or discharge |
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| valves |
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Oil leakage between the | Worn oil seals and/or | Replace oil seals and/or | ||
engine and the pump |
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Fluctuating pressure | 1. | Valve worn, dirty or stuck | 1. | Check and replace |
| 2. | Pump drawing in air | 2. | Ensure hoses and fittings are tight. Purge air from |
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| garden hose |
| 3. | Tip clogged | 3. | Check or replace |
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Pressure drops after period of | 1. | Worn pump water seals | 1. | Check and replace |
normal use | 2. | Nozzle worn | 2. | Check and replace |
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| 3. | Valve worn, dirty or stuck | 3. | Check, clean or replace |
| 4. | Unloader valve seat worn or dirty | 4. | Check, clean or replace |
| 5. | Nozzle in low psi position | 5. | Pull back nozzle to high pressure position |
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| Continued on next page |
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