Troubleshooting
Problem | Cause | Solution |
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Engine will not start. | Various engine problems. | Refer to the engine manual accom- |
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| panying your unit. |
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| Unit components are frozen. | Allow to thaw. If any part of the unit |
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| becomes frozen; excessive pres- |
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| sure may build up in the unit which |
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| could cause the unit to burst result- |
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| ing in possible serious injury to the |
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| operator or bystanders. |
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No discharge at nozzle when trig- | Inadequate water supply. | Ensure hose is 3/4” (19.05mm) di- |
ger mechanism is squeezed. |
| ameter and incoming water supply |
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| is turned on. |
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Low or fluctuating pressure. | Kink in water inlet hose. | Remove kink. |
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| Kink in high pressure discharge | Replace hose. |
| hose. |
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| Water inlet screen obstructed. | Remove screen, clean or replace. |
| Pump sucking air. (Prime eliminated) | Tighten all water intake connec- |
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| tions. Eliminate leaks in intake line. |
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| Not in high pressure mode. | Insert a high pressure nozzle. |
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| Obstructed or worn spray nozzle. | Remove, clean or replace. |
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| Damaged or obstructed valve as- | Remove, inspect, clean or replace. |
| sembly on pump. |
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| Pump packing worn. | Replace packings. |
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| Bypass valve not operating correctly. | Repair or replace. |
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Water is leaking from the “Heat | Water temperature is too high. | Do not allow the unit to operate in |
Dump Valve”. |
| the bypass mode (with trigger gun |
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| closed) for more than 3 minutes. |
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| Defective valve. | Replace. |
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Oil appears milky or foamy. | Water in oil. | Change pump oil. Fill to proper |
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| level. |
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Oil leaking from unit. | Do Not Use. | Contact Customer Service. |
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Detergent will not siphon into Low | Detergent strainer is not completely | Check, submerge if necessary. |
Pressure Detergent mode. | submerged in detergent solution. |
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| Detergent strainer is obstructed. | Inspect, clean or replace. |
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| Detergent hose cut, obstructed. | Inspect, clean or replace. |
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| Detergent adjusting knob on pump | Open adjusting knob. Refer to |
| turned to closed position. (If appli- | “Cleaning with Detergents” pg.13. |
| cable.) |
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| Not in low pressure mode. | Insert 6540° (BLACK) nozzle. |
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| Nozzle assembly is plugged. | Clean or replace. |
| Too many high pressure hose exten- | Use one extension maximum. |
| sions attached to the water outlet. |
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| Ball and Spring in Venturi stuck. | Remove, clean or replace. |
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Water flows back into detergent | Ball and Spring in Venturi reversed, | Remove, clean or replace. |
container. | missing or corroded. |
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Water flows from the nozzle when | Gun is malfunctioning. | Repair or replace. |
the trigger gun is locked in the |
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“OFF” position. |
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