Pressure Washer
Troubleshooting Chart - Gasoline Powered Pressure Washers Only
Symptom | Possible Cause(s) | Corrective Action | ||
Engine will not start or | 1. | No gasoline in fuel tank or | 1. | Fill the tank with gasoline, open fuel shut off valve.. |
is hard to start |
| carburetor |
| Check fuel line and carburetor |
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| 2. | Check oil level.. Fill if necessary |
| 2. | Low oil | 3. | Move switch to start position |
| 3. | Start/Stop switch in stop position | 4. | Drain fuel tank and carburetor.. Use new fuel and dry |
| 4. | Water in gasoline or old fuel |
| spark plug |
| 5. | Dirty air cleaner filter | 5. | Remove and clean or replace |
| 6. | Spark plug dirty, wrong gap or | 6. | Clean, adjust the gap, or replace |
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| wrong type | 7. | Trigger spray gun |
| 7. | Spray gun closed | 8. | See engine owner’s manual |
| 8. | Other causes |
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Engine misses or lacks | 1. | Partially plugged air cleaner filter | 1. | Remove and clean or replace |
power | 2. Spark plug dirty, wrong gap or | 2. | Clean, adjust the gap, or replace | |
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| wrong type |
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Low pressure and/or | 1. Worn or wrong size tip | 1. | Replace with tip of proper size | |
pump runs rough | 2. Inlet filter on pump clogged | 2. | Clean.. Check more frequently | |
| 3. | Worn water seals, abrasives in | 3. | Check filter.. Replace water seals.. See service center |
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| water, or natural wear | 4. | Clean inlet and discharge valve assemblies.. Check |
| 4. | Fouled or dirty inlet or discharge | ||
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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 | Worn water seals | Install new water seals.. See service center | ||
under pump manifold |
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Water in pump | 1. Humid air condensing inside | 1. | Change oil as specified in maintenance schedule | |
crankcase (milky oil) |
| crankcase | 2. | Install new oil seals.. See service center |
| 2. | Oil seals leaking |
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Frequent or premature | 1. Scored damaged or worn plungers | 1. | Install new plungers.. See service center | |
failure of the pump | 2. | Abrasive material in the fluid | 2. | Install proper filtration on pump inlet plumbing |
water seals | 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 | 6. | Never run pump more than 2 minutes without |
| 6. | Pump running too long 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 | Foreign particles in the inlet or | Clean or replace valves.. See service center | ||
inlet and low pressure | discharge valve or worn inlet and/or |
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| discharge 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 |
| 2. | Pump drawing in air |
| 3. | Tip clogged |
1.Check and replace
2.Ensure hoses and fittings are tight.. Purge air from garden hose
3.Check or replace
Pressure drops after | 1. Worn pump water seals | 1. | Check and replace | |
period of normal use | 2. Nozzle worn | 2. | Check and replace | |
| 3. | Valve worn, dirty or stuck | 3. | Check, clean or replace |
| 4. | Unloader valve seat worn or dirty | 4. | Check, clean or replace |
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Pump noisy / pump runs | 1. Pump drawing in air/low water | 1. | Ensure fittings are tight.. Increase water pressure | |
rough |
| supply | 2. | Check, clean or replace |
| 2. | Valves dirty or worn | 3. | Check and replace |
| 3. | Worn bearings | 4. | Reduce temperature below 100° F |
| 4. | Water too hot |
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www.chpower.com | 14 |
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