Pressure Washer
Troubleshooting Chart - Gasoline Powered Pressure Washers Only
Symptom
Possible Cause(s)
Corrective Action
Engine will not start or is hard | 1. | No gasoline in fuel tank or carburetor | 1. | Fill the tank with gasoline, open fuel shut off valve.. Check fuel line |
to start |
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| and carburetor |
| 2. | Low oil | 2. | Check oil level.. Fill if necessary |
| 3. | Start/Stop switch in stop position | 3. | Move switch to start position |
| 4. | Water in gasoline or old fuel | 4. | Drain fuel tank and carburetor.. Use new fuel and dry spark plug |
| 5. | Dirty air cleaner filter | 5. | Remove and clean or replace |
| 6. | Spark plug dirty, wrong gap or wrong type | 6. | Clean, adjust the gap, or replace |
| 7. | Spray gun closed | 7. | Trigger spray gun |
| 8. | Other causes | 8. | See engine owner’s manual |
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Engine misses or lacks power | 1. | Partially plugged air cleaner filter | 1. | Remove and clean or replace |
| 2. | Spark plug dirty, wrong gap or wrong type | 2. | Clean, adjust the gap, or replace |
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Low pressure and/or pump runs | 1. | Worn or wrong size tip | 1. | Replace with tip of proper size |
rough | 2. | Inlet filter on pump clogged | 2. | Clean.. Check more frequently |
| 3. | Worn water seals, abrasives in water, or | 3. | Check filter.. Replace water seals.. See service center |
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| natural wear |
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| 4. | Fouled or dirty inlet or discharge valves | 4. | Clean inlet and discharge valve assemblies.. Check filter |
| 5. | Restricted inlet | 5. | Check garden hose, may be collapsed or kinked.. Check inlet water |
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| 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 crankcase | 1. | Change oil as specified in maintenance schedule |
(milky oil) | 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 |
| 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 plugged or | 5. | Clean or replace tip.. |
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| damaged tip |
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| 6. | Pump running too long without spraying | 6. | Never run pump more than 2 minutes without 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 valve or | Clean or replace valves.. See service center | ||
low pressure | worn inlet and/or 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 | 1. | Check and replace |
| 2. | Pump drawing in air | 2. | Ensure hoses and fittings are tight.. Purge air from 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 |
| 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 rough | 1. | Pump drawing in air/low water supply | 1. | Ensure fittings are tight.. Increase water pressure |
| 2. | Valves dirty or worn | 2. | Check, clean or replace |
| 3. | Worn bearings | 3. | Check and replace |
| 4. | Water too hot | 4. | Reduce temperature below 100° F |
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Pressure washer will not spray | 1. | Nozzle not pushed up far enough | 1. | Push nozzle forward as far as it will go.. |
detergent | 2. | Clog, kink, or hole in detergent suction hose | 2. | If clean, unkink or replace hose.. |
| 3. | Hose length too long | 3. | Use only hose length provided with initial purchase of pressure |
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| washer.. Detergent suction will not function if more than once section |
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| of hose is attached to unit.. |
| 4. | Lance not functioning properly | 4. | Remove lance from gun.. If detergent is dispensed through gun, the |
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| lance must be replaced.. If not detergent is dispensed through gun, |
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| remove 1 inch tapered detergent barb from pump.. Clean the barb, |
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| and make sure that ball and spring are properly aligned with tapered |
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| portion of the spring facing the ball.. The ball should be on top of the |
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| spring.. |
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www.chpower.com | 14 |
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